***** 2026 JANUARY *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Thu Jan 01/Fri Jan 02 1042.7 7 02 11 16 25 18 05 5 33 7 13 1 06 12 36 ..... 6 50 98 5 35.6 27 58
Fri Jan 02/Sat Jan 03 1043.7 7 06 08 16 26 18 06 5 33 7 13 1 11 12 40 15 20 7 48 100 6 44.2 27 13
Sat Jan 03/Sun Jan 04 1044.7 7 10 05 16 27 18 06 5 34 7 13 1 15 12 45 16 36 8 33 99 7 49.9 24 28
Sun Jan 04/Mon Jan 05 1045.7 7 14 01 16 28 18 07 5 34 7 13 1 20 12 49 17 57 ..... 95 8 50.6 20 07
Mon Jan 05/Tue Jan 06 1046.7 7 17 58 16 29 18 08 5 34 7 13 1 25 12 52 19 14 ..... 89 9 46.0 14 43
Tue Jan 06/Wed Jan 07 1047.7 7 21 54 16 30 18 09 5 34 7 13 1 30 12 56 20 28 ..... 82 10 36.6 8 46
Wed Jan 07/Thu Jan 08 1048.7 7 25 51 16 31 18 10 5 34 7 13 1 35 13 00 21 37 ..... 73 11 23.8 2 37
Thu Jan 08/Fri Jan 09 1049.7 7 29 47 16 32 18 11 5 33 7 12 1 40 13 04 22 43 ..... 63 12 08.9 - 3 27
Fri Jan 09/Sat Jan 10 1050.7 7 33 44 16 33 18 12 5 33 7 12 1 44 13 08 23 47 ..... 54 12 53.1 - 9 12
Sat Jan 10/Sun Jan 11 1051.7 7 37 40 16 34 18 13 5 33 7 12 1 49 13 12 0 51 ..... 44 13 37.6 -14 30
Sun Jan 11/Mon Jan 12 1052.7 7 41 37 16 35 18 13 5 33 7 12 1 54 13 16 1 54 ..... 35 14 23.3 -19 11
Mon Jan 12/Tue Jan 13 1053.7 7 45 34 16 36 18 14 5 33 7 11 1 59 13 19 2 58 ..... 26 15 10.8 -23 05
Tue Jan 13/Wed Jan 14 1054.7 7 49 30 16 37 18 15 5 33 7 11 2 04 13 23 4 01 ..... 18 16 00.6 -26 04
Wed Jan 14/Thu Jan 15 1055.7 7 53 27 16 38 18 16 5 32 7 10 2 09 13 27 5 02 ..... 12 16 52.6 -27 56
Thu Jan 15/Fri Jan 16 1056.7 7 57 23 16 39 18 17 5 32 7 10 2 14 13 30 5 56 ..... 6 17 46.2 -28 34
Fri Jan 16/Sat Jan 17 1057.7 8 01 20 16 41 18 18 5 32 7 09 2 19 13 34 6 43 ..... 3 18 40.4 -27 52
Sat Jan 17/Sun Jan 18 1058.7 8 05 16 16 42 18 19 5 31 7 09 2 24 13 37 7 22 15 23 1 19 34.0 -25 52
Sun Jan 18/Mon Jan 19 1059.7 8 09 13 16 43 18 20 5 31 7 08 2 29 13 41 7 54 16 30 0 20 26.1 -22 37
Mon Jan 19/Tue Jan 20 1060.7 8 13 09 16 44 18 22 5 30 7 08 2 34 13 44 8 20 17 38 2 21 16.3 -18 19
Tue Jan 20/Wed Jan 21 1061.7 8 17 06 16 45 18 23 5 30 7 07 2 39 13 48 ..... 18 48 6 22 04.6 -13 10
Wed Jan 21/Thu Jan 22 1062.7 8 21 03 16 47 18 24 5 29 7 06 2 44 13 51 ..... 19 57 11 22 51.7 - 7 22
Thu Jan 22/Fri Jan 23 1063.7 8 24 59 16 48 18 25 5 29 7 05 2 49 13 55 ..... 21 06 19 23 38.3 - 1 11
Fri Jan 23/Sat Jan 24 1064.7 8 28 56 16 49 18 26 5 28 7 05 2 54 13 58 ..... 22 16 28 0 25.7 5 09
Sat Jan 24/Sun Jan 25 1065.7 8 32 52 16 50 18 27 5 28 7 04 2 59 14 01 ..... 23 28 38 1 14.8 11 21
Sun Jan 25/Mon Jan 26 1066.7 8 36 49 16 52 18 28 5 27 7 03 3 04 14 05 ..... 0 44 49 2 07.1 17 06
Mon Jan 26/Tue Jan 27 1067.7 8 40 45 16 53 18 29 5 26 7 02 3 09 14 08 ..... 2 01 61 3 03.4 22 02
Tue Jan 27/Wed Jan 28 1068.7 8 44 42 16 54 18 30 5 26 7 01 3 14 14 11 ..... 3 19 72 4 04.4 25 43
Wed Jan 28/Thu Jan 29 1069.7 8 48 38 16 56 18 31 5 25 7 00 3 19 14 14 ..... 4 32 82 5 09.1 27 43
Thu Jan 29/Fri Jan 30 1070.7 8 52 35 16 57 18 32 5 24 6 59 3 24 14 17 ..... 5 34 90 6 15.7 27 47
Fri Jan 30/Sat Jan 31 1071.7 8 56 32 16 58 18 34 5 23 6 58 3 29 14 21 ..... 6 24 96 7 21.2 25 51
Sat Jan 31/Sun Feb 01 1072.7 9 00 28 16 59 18 35 5 22 6 57 3 34 14 24 ..... 7 02 99 8 23.3 22 10
***** 2026 FEBRUARY *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Sun Feb 01/Mon Feb 02 1073.7 9 04 25 17 01 18 36 5 21 6 56 3 39 14 27 16 47 7 32 100 9 20.8 17 10
Mon Feb 02/Tue Feb 03 1074.7 9 08 21 17 02 18 37 5 21 6 55 3 44 14 30 18 03 7 56 98 10 13.8 11 20
Tue Feb 03/Wed Feb 04 1075.7 9 12 18 17 03 18 38 5 20 6 54 3 49 14 33 19 15 8 18 93 11 03.2 5 05
Wed Feb 04/Thu Feb 05 1076.7 9 16 14 17 05 18 39 5 19 6 53 3 55 14 36 20 24 ..... 87 11 50.1 - 1 12
Thu Feb 05/Fri Feb 06 1077.7 9 20 11 17 06 18 40 5 18 6 52 4 00 14 39 21 30 ..... 80 12 35.7 - 7 16
Fri Feb 06/Sat Feb 07 1078.7 9 24 07 17 07 18 42 5 17 6 51 4 05 14 42 22 36 ..... 71 13 21.1 -12 54
Sat Feb 07/Sun Feb 08 1079.7 9 28 04 17 09 18 43 5 16 6 49 4 10 14 44 23 41 ..... 62 14 07.2 -17 55
Sun Feb 08/Mon Feb 09 1080.7 9 32 01 17 10 18 44 5 14 6 48 4 15 14 47 0 45 ..... 52 14 54.8 -22 10
Mon Feb 09/Tue Feb 10 1081.7 9 35 57 17 11 18 45 5 13 6 47 4 20 14 50 1 49 ..... 43 15 44.4 -25 29
Tue Feb 10/Wed Feb 11 1082.7 9 39 54 17 12 18 46 5 12 6 46 4 25 14 53 2 51 ..... 34 16 36.0 -27 42
Wed Feb 11/Thu Feb 12 1083.7 9 43 50 17 14 18 47 5 11 6 44 4 30 14 56 3 48 ..... 25 17 29.3 -28 43
Thu Feb 12/Fri Feb 13 1084.7 9 47 47 17 15 18 48 5 10 6 43 4 35 14 58 4 37 ..... 18 18 23.5 -28 26
Fri Feb 13/Sat Feb 14 1085.7 9 51 43 17 16 18 50 5 09 6 42 4 40 15 01 5 19 ..... 11 19 17.4 -26 48
Sat Feb 14/Sun Feb 15 1086.7 9 55 40 17 18 18 51 5 07 6 40 4 46 15 04 5 54 ..... 6 20 10.3 -23 54
Sun Feb 15/Mon Feb 16 1087.7 9 59 36 17 19 18 52 5 06 6 39 4 51 15 07 6 23 ..... 2 21 01.5 -19 50
Mon Feb 16/Tue Feb 17 1088.7 10 03 33 17 20 18 53 5 05 6 38 4 56 15 09 6 47 16 33 0 21 51.0 -14 50
Tue Feb 17/Wed Feb 18 1089.7 10 07 30 17 21 18 54 5 03 6 36 5 01 15 12 7 09 17 43 1 22 39.1 - 9 05
Wed Feb 18/Thu Feb 19 1090.7 10 11 26 17 23 18 55 5 02 6 35 5 06 15 14 7 30 18 54 3 23 26.6 - 2 51
Thu Feb 19/Fri Feb 20 1091.7 10 15 23 17 24 18 57 5 01 6 33 5 11 15 17 7 52 20 05 8 0 14.5 3 36
Fri Feb 20/Sat Feb 21 1092.7 10 19 19 17 25 18 58 4 59 6 32 5 16 15 19 ..... 21 18 15 1 03.7 9 56
Sat Feb 21/Sun Feb 22 1093.7 10 23 16 17 26 18 59 4 58 6 30 5 21 15 22 ..... 22 33 24 1 55.4 15 52
Sun Feb 22/Mon Feb 23 1094.7 10 27 12 17 28 19 00 4 56 6 29 5 27 15 24 ..... 23 51 34 2 50.6 20 59
Mon Feb 23/Tue Feb 24 1095.7 10 31 09 17 29 19 01 4 55 6 27 5 32 15 27 ..... 1 09 46 3 49.6 24 56
Tue Feb 24/Wed Feb 25 1096.7 10 35 05 17 30 19 02 4 54 6 26 5 37 15 29 ..... 2 22 57 4 52.0 27 19
Wed Feb 25/Thu Feb 26 1097.7 10 39 02 17 31 19 04 4 52 6 24 5 42 15 32 ..... 3 27 68 5 56.4 27 54
Thu Feb 26/Fri Feb 27 1098.7 10 42 59 17 33 19 05 4 50 6 23 5 47 15 34 ..... 4 19 79 7 00.3 26 36
Fri Feb 27/Sat Feb 28 1099.7 10 46 55 17 34 19 06 4 49 6 21 5 52 15 37 ..... 5 00 87 8 01.7 23 33
Sat Feb 28/Sun Mar 01 1100.7 10 50 52 17 35 19 07 4 47 6 19 5 57 15 39 ..... 5 32 94 8 59.2 19 05
***** 2026 MARCH *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Sun Mar 01/Mon Mar 02 1101.7 10 54 48 17 36 19 08 4 46 6 18 6 02 15 41 ..... 5 58 98 9 52.8 13 37
Mon Mar 02/Tue Mar 03 1102.7 10 58 45 17 38 19 10 4 44 6 16 6 08 15 44 16 54 6 20 100 10 43.0 7 33
Tue Mar 03/Wed Mar 04 1103.7 11 02 41 17 39 19 11 4 43 6 14 6 13 15 46 18 04 6 40 99 11 30.6 1 15
Wed Mar 04/Thu Mar 05 1104.7 11 06 38 17 40 19 12 4 41 6 13 6 18 15 48 19 12 7 00 97 12 16.9 - 4 59
Thu Mar 05/Fri Mar 06 1105.7 11 10 34 17 41 19 13 4 39 6 11 6 23 15 51 20 18 7 20 92 13 02.9 -10 54
Fri Mar 06/Sat Mar 07 1106.7 11 14 31 17 42 19 14 4 38 6 10 6 28 15 53 21 24 7 43 86 13 49.3 -16 15
Sat Mar 07/Sun Mar 08* 1107.7 11 18 28 17 44 19 16 5 36 7 08 6 33 15 55 22 30 ..... 78 14 37.1 -20 53
Sun Mar 08/Mon Mar 09 1108.7 10 22 14 18 45 20 17 5 34 7 06 6 39 15 57 0 35 ..... 70 15 24.8 -24 23
Mon Mar 09/Tue Mar 10 1109.7 10 26 11 18 46 20 18 5 32 7 04 6 44 15 59 1 38 ..... 61 16 16.0 -27 04
Tue Mar 10/Wed Mar 11 1110.7 10 30 07 18 47 20 19 5 31 7 03 6 49 16 02 2 37 ..... 52 17 08.8 -28 34
Wed Mar 11/Thu Mar 12 1111.7 10 34 04 18 48 20 21 5 29 7 01 6 54 16 04 3 29 ..... 42 18 02.6 -28 46
Thu Mar 12/Fri Mar 13 1112.7 10 38 00 18 49 20 22 5 27 6 59 6 59 16 06 4 14 ..... 33 18 56.4 -27 40
Fri Mar 13/Sat Mar 14 1113.7 10 41 57 18 51 20 23 5 25 6 58 7 04 16 08 4 51 ..... 24 19 49.3 -25 16
Sat Mar 14/Sun Mar 15 1114.7 10 45 54 18 52 20 24 5 24 6 56 7 10 16 10 5 22 ..... 16 20 40.9 -21 41
Sun Mar 15/Mon Mar 16 1115.7 10 49 50 18 53 20 26 5 22 6 54 7 15 16 12 5 49 ..... 10 21 30.9 -17 04
Mon Mar 16/Tue Mar 17 1116.7 10 53 47 18 54 20 27 5 20 6 53 7 20 16 15 6 12 ..... 4 22 19.6 -11 34
Tue Mar 17/Wed Mar 18 1117.7 10 57 43 18 55 20 28 5 18 6 51 7 25 16 17 6 33 17 34 1 23 07.8 - 5 27
Wed Mar 18/Thu Mar 19 1118.7 11 01 40 18 56 20 29 5 16 6 49 7 30 16 19 6 55 18 47 0 23 56.2 1 03
Thu Mar 19/Fri Mar 20 1119.7 11 05 36 18 57 20 31 5 14 6 47 7 36 16 21 7 18 20 01 2 0 45.9 7 36
Fri Mar 20/Sat Mar 21 1120.7 11 09 33 18 59 20 32 5 12 6 46 7 41 16 23 ..... 21 17 6 1 38.0 13 52
Sat Mar 21/Sun Mar 22 1121.7 11 13 29 19 00 20 33 5 11 6 44 7 46 16 25 ..... 22 36 12 2 33.4 19 25
Sun Mar 22/Mon Mar 23 1122.7 11 17 26 19 01 20 35 5 09 6 42 7 51 16 27 ..... 23 56 21 3 32.5 23 50
Mon Mar 23/Tue Mar 24 1123.7 11 21 23 19 02 20 36 5 07 6 40 7 57 16 29 ..... 1 13 31 4 34.9 26 43
Tue Mar 24/Wed Mar 25 1124.7 11 25 19 19 03 20 37 5 05 6 39 8 02 16 31 ..... 2 21 42 5 39.1 27 48
Wed Mar 25/Thu Mar 26 1125.7 11 29 16 19 04 20 39 5 03 6 37 8 07 16 33 ..... 3 17 54 6 43.0 27 01
Thu Mar 26/Fri Mar 27 1126.7 11 33 12 19 05 20 40 5 01 6 35 8 12 16 35 ..... 4 00 65 7 44.4 24 28
Fri Mar 27/Sat Mar 28 1127.7 11 37 09 19 07 20 41 4 59 6 33 8 18 16 37 ..... 4 34 75 8 42.0 20 28
Sat Mar 28/Sun Mar 29 1128.7 11 41 05 19 08 20 43 4 57 6 32 8 23 16 39 ..... 5 01 84 9 35.5 15 24
Sun Mar 29/Mon Mar 30 1129.7 11 45 02 19 09 20 44 4 55 6 30 8 28 16 41 ..... 5 24 91 10 25.6 9 38
Mon Mar 30/Tue Mar 31 1130.7 11 48 58 19 10 20 45 4 53 6 28 8 34 16 43 ..... 5 45 96 11 13.2 3 31
Tue Mar 31/Wed Apr 01 1131.7 11 52 55 19 11 20 47 4 51 6 27 8 39 16 45 17 57 6 04 99 11 59.3 - 2 41
***** 2026 APRIL *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Wed Apr 01/Thu Apr 02 1132.7 11 56 52 19 12 20 48 4 49 6 25 8 44 16 47 19 03 6 24 100 12 44.9 - 8 41
Thu Apr 02/Fri Apr 03 1133.7 12 00 48 19 13 20 49 4 47 6 23 8 50 16 49 20 09 6 45 99 13 31.0 -14 15
Fri Apr 03/Sat Apr 04 1134.7 12 04 45 19 14 20 51 4 45 6 21 8 55 16 51 21 15 ..... 95 14 18.4 -19 11
Sat Apr 04/Sun Apr 05 1135.7 12 08 41 19 16 20 52 4 43 6 20 9 00 16 53 22 20 ..... 91 15 07.5 -23 16
Sun Apr 05/Mon Apr 06 1136.7 12 12 38 19 17 20 54 4 41 6 18 9 06 16 55 23 25 ..... 84 15 58.6 -26 20
Mon Apr 06/Tue Apr 07 1137.7 12 16 34 19 18 20 55 4 39 6 16 9 11 16 57 0 25 ..... 77 16 51.2 -28 14
Tue Apr 07/Wed Apr 08 1138.7 12 20 31 19 19 20 57 4 37 6 15 9 17 16 58 1 21 ..... 68 17 44.9 -28 52
Wed Apr 08/Thu Apr 09 1139.7 12 24 27 19 20 20 58 4 35 6 13 9 22 17 00 2 08 ..... 59 18 38.6 -28 12
Thu Apr 09/Fri Apr 10 1140.7 12 28 24 19 21 21 00 4 33 6 11 9 27 17 02 2 48 ..... 50 19 31.5 -26 14
Fri Apr 10/Sat Apr 11 1141.7 12 32 21 19 22 21 01 4 31 6 10 9 33 17 04 3 21 ..... 40 20 23.0 -23 06
Sat Apr 11/Sun Apr 12 1142.7 12 36 17 19 23 21 02 4 29 6 08 9 38 17 06 3 48 ..... 31 21 12.8 -18 54
Sun Apr 12/Mon Apr 13 1143.7 12 40 14 19 25 21 04 4 27 6 06 9 44 17 08 4 12 ..... 22 22 01.3 -13 48
Mon Apr 13/Tue Apr 14 1144.7 12 44 10 19 26 21 06 4 25 6 05 9 49 17 10 4 34 ..... 14 22 49.1 - 7 58
Tue Apr 14/Wed Apr 15 1145.7 12 48 07 19 27 21 07 4 23 6 03 9 55 17 12 4 56 ..... 7 23 37.1 - 1 39
Wed Apr 15/Thu Apr 16 1146.7 12 52 03 19 28 21 09 4 21 6 02 10 00 17 14 5 18 17 36 3 0 26.4 4 54
Thu Apr 16/Fri Apr 17 1147.7 12 56 00 19 29 21 10 4 19 6 00 10 06 17 16 5 43 18 52 0 1 18.1 11 22
Fri Apr 17/Sat Apr 18 1148.7 12 59 56 19 30 21 12 4 17 5 58 10 11 17 18 6 13 20 12 1 2 13.3 17 18
Sat Apr 18/Sun Apr 19 1149.7 13 03 53 19 31 21 13 4 15 5 57 10 17 17 20 ..... 21 34 4 3 12.5 22 14
Sun Apr 19/Mon Apr 20 1150.7 13 07 50 19 32 21 15 4 13 5 55 10 22 17 22 ..... 22 55 10 4 15.6 25 43
Mon Apr 20/Tue Apr 21 1151.7 13 11 46 19 34 21 16 4 11 5 54 10 28 17 24 ..... 0 09 18 5 21.2 27 22
Tue Apr 21/Wed Apr 22 1152.7 13 15 43 19 35 21 18 4 09 5 52 10 33 17 25 ..... 1 11 28 6 26.7 27 03
Wed Apr 22/Thu Apr 23 1153.7 13 19 39 19 36 21 20 4 07 5 51 10 39 17 27 ..... 2 00 39 7 29.6 24 54
Thu Apr 23/Fri Apr 24 1154.7 13 23 36 19 37 21 21 4 05 5 49 10 44 17 29 ..... 2 37 50 8 28.4 21 12
Fri Apr 24/Sat Apr 25 1155.7 13 27 32 19 38 21 23 4 03 5 48 10 50 17 31 ..... 3 06 61 9 22.7 16 23
Sat Apr 25/Sun Apr 26 1156.7 13 31 29 19 39 21 24 4 01 5 46 10 56 17 33 ..... 3 30 71 10 13.0 10 51
Sun Apr 26/Mon Apr 27 1157.7 13 35 25 19 40 21 26 3 59 5 45 11 01 17 35 ..... 3 50 80 11 00.5 4 54
Mon Apr 27/Tue Apr 28 1158.7 13 39 22 19 42 21 28 3 57 5 43 11 07 17 37 ..... 4 10 88 11 46.2 - 1 11
Tue Apr 28/Wed Apr 29 1159.7 13 43 19 19 43 21 29 3 55 5 42 11 12 17 39 ..... 4 29 94 12 31.2 - 7 08
Wed Apr 29/Thu Apr 30 1160.7 13 47 15 19 44 21 31 3 53 5 41 11 18 17 41 17 58 4 50 98 13 16.7 -12 46
Thu Apr 30/Fri May 01 1161.7 13 51 12 19 45 21 33 3 51 5 39 11 24 17 43 19 03 5 13 100 14 03.4 -17 50
***** 2026 MAY *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Fri May 01/Sat May 02 1162.7 13 55 08 19 46 21 34 3 50 5 38 11 29 17 45 20 09 5 40 100 14 51.9 -22 10
Sat May 02/Sun May 03 1163.7 13 59 05 19 47 21 36 3 48 5 37 11 35 17 47 21 13 6 13 98 15 42.4 -25 32
Sun May 03/Mon May 04 1164.7 14 03 01 19 48 21 38 3 46 5 35 11 40 17 49 22 15 ..... 94 16 34.9 -27 47
Mon May 04/Tue May 05 1165.7 14 06 58 19 49 21 40 3 44 5 34 11 46 17 51 23 13 ..... 89 17 28.6 -28 47
Tue May 05/Wed May 06 1166.7 14 10 54 19 50 21 41 3 42 5 33 11 52 17 54 0 03 ..... 82 18 22.5 -28 28
Wed May 06/Thu May 07 1167.7 14 14 51 19 51 21 43 3 40 5 32 11 57 17 56 0 45 ..... 75 19 15.6 -26 53
Thu May 07/Fri May 08 1168.7 14 18 48 19 53 21 45 3 38 5 30 12 03 17 58 1 20 ..... 66 20 07.1 -24 06
Fri May 08/Sat May 09 1169.7 14 22 44 19 54 21 46 3 37 5 29 12 09 18 00 1 49 ..... 57 20 56.8 -20 16
Sat May 09/Sun May 10 1170.7 14 26 41 19 55 21 48 3 35 5 28 12 14 18 02 2 13 ..... 47 21 44.8 -15 32
Sun May 10/Mon May 11 1171.7 14 30 37 19 56 21 50 3 33 5 27 12 20 18 04 2 36 ..... 37 22 31.9 -10 04
Mon May 11/Tue May 12 1172.7 14 34 34 19 57 21 51 3 31 5 26 12 26 18 06 2 57 ..... 27 23 18.7 - 4 04
Tue May 12/Wed May 13 1173.7 14 38 30 19 58 21 53 3 30 5 25 12 31 18 09 3 18 ..... 18 0 06.5 2 17
Wed May 13/Thu May 14 1174.7 14 42 27 19 59 21 55 3 28 5 24 12 37 18 11 3 41 ..... 10 0 56.5 8 42
Thu May 14/Fri May 15 1175.7 14 46 23 20 00 21 57 3 26 5 23 12 43 18 13 4 08 17 42 4 1 49.9 14 49
Fri May 15/Sat May 16 1176.7 14 50 20 20 01 21 58 3 25 5 22 12 48 18 15 4 42 19 03 1 2 47.7 20 12
Sat May 16/Sun May 17 1177.7 14 54 17 20 02 22 00 3 23 5 21 12 54 18 18 5 26 20 27 0 3 50.2 24 19
Sun May 17/Mon May 18 1178.7 14 58 13 20 03 22 02 3 21 5 20 12 59 18 20 6 22 21 47 3 4 56.4 26 43
Mon May 18/Tue May 19 1179.7 15 02 10 20 04 22 03 3 20 5 19 13 05 18 23 ..... 22 57 8 6 03.9 27 04
Tue May 19/Wed May 20 1180.7 15 06 06 20 05 22 05 3 18 5 18 13 11 18 25 ..... 23 53 16 7 09.6 25 26
Wed May 20/Thu May 21 1181.7 15 10 03 20 06 22 06 3 17 5 17 13 16 18 27 ..... 0 35 25 8 11.3 22 04
Thu May 21/Fri May 22 1182.7 15 13 59 20 07 22 08 3 15 5 16 13 22 18 30 ..... 1 08 36 9 07.9 17 25
Fri May 22/Sat May 23 1183.7 15 17 56 20 08 22 10 3 14 5 16 13 27 18 32 ..... 1 34 46 10 00.0 11 58
Sat May 23/Sun May 24 1184.7 15 21 52 20 09 22 11 3 13 5 15 13 33 18 35 ..... 1 56 57 10 48.4 6 04
Sun May 24/Mon May 25 1185.7 15 25 49 20 10 22 13 3 11 5 14 13 38 18 38 ..... 2 16 67 11 34.5 0 01
Mon May 25/Tue May 26 1186.7 15 29 46 20 11 22 14 3 10 5 13 13 44 18 40 ..... 2 35 76 12 19.4 - 5 55
Tue May 26/Wed May 27 1187.7 15 33 42 20 12 22 16 3 09 5 13 13 49 18 43 ..... 2 55 84 13 04.4 -11 34
Wed May 27/Thu May 28 1188.7 15 37 39 20 13 22 17 3 07 5 12 13 55 18 46 ..... 3 18 91 13 50.4 -16 43
Thu May 28/Fri May 29 1189.7 15 41 35 20 13 22 19 3 06 5 12 14 00 18 48 18 00 3 43 95 14 38.1 -21 12
Fri May 29/Sat May 30 1190.7 15 45 32 20 14 22 20 3 05 5 11 14 05 18 51 19 05 4 14 98 15 27.9 -24 47
Sat May 30/Sun May 31 1191.7 15 49 28 20 15 22 22 3 04 5 10 14 11 18 54 20 07 4 51 100 16 19.9 -27 19
Sun May 31/Mon Jun 01 1192.7 15 53 25 20 16 22 23 3 03 5 10 14 16 18 57 21 06 5 36 99 17 13.5 -28 38
***** 2026 JUNE *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Mon Jun 01/Tue Jun 02 1193.7 15 57 21 20 17 22 24 3 02 5 09 14 21 19 00 21 59 6 29 97 18 07.6 -28 39
Tue Jun 02/Wed Jun 03 1194.7 16 01 18 20 17 22 26 3 01 5 09 14 27 19 03 22 43 ..... 93 19 01.2 -27 21
Wed Jun 03/Thu Jun 04 1195.7 16 05 15 20 18 22 27 3 00 5 09 14 32 19 06 23 20 ..... 87 19 53.2 -24 51
Thu Jun 04/Fri Jun 05 1196.7 16 09 11 20 19 22 28 2 59 5 08 14 37 19 09 23 50 ..... 80 20 43.2 -21 16
Fri Jun 05/Sat Jun 06 1197.7 16 13 08 20 20 22 29 2 58 5 08 14 42 19 12 0 16 ..... 72 21 31.3 -16 47
Sat Jun 06/Sun Jun 07 1198.7 16 17 04 20 20 22 30 2 58 5 08 14 47 19 15 0 39 ..... 62 22 17.9 -11 34
Sun Jun 07/Mon Jun 08 1199.7 16 21 01 20 21 22 31 2 57 5 07 14 52 19 19 0 59 ..... 52 23 03.8 - 5 49
Mon Jun 08/Tue Jun 09 1200.7 16 24 57 20 21 22 32 2 56 5 07 14 57 19 22 1 20 ..... 42 23 50.0 0 17
Tue Jun 09/Wed Jun 10 1201.7 16 28 54 20 22 22 33 2 56 5 07 15 02 19 25 1 41 ..... 31 0 37.9 6 31
Wed Jun 10/Thu Jun 11 1202.7 16 32 50 20 23 22 34 2 55 5 07 15 07 19 29 2 06 ..... 21 1 28.6 12 36
Thu Jun 11/Fri Jun 12 1203.7 16 36 47 20 23 22 35 2 55 5 07 15 11 19 32 2 35 ..... 13 2 23.5 18 11
Fri Jun 12/Sat Jun 13 1204.7 16 40 44 20 24 22 36 2 55 5 07 15 16 19 36 3 13 17 56 6 3 23.4 22 46
Sat Jun 13/Sun Jun 14 1205.7 16 44 40 20 24 22 36 2 54 5 07 15 21 19 40 4 02 19 18 2 4 28.0 25 51
Sun Jun 14/Mon Jun 15 1206.7 16 48 37 20 25 22 37 2 54 5 07 15 25 19 43 5 06 20 34 0 5 35.6 27 02
Mon Jun 15/Tue Jun 16 1207.7 16 52 33 20 25 22 38 2 54 5 07 15 30 19 47 6 21 21 38 2 6 43.3 26 08
Tue Jun 16/Wed Jun 17 1208.7 16 56 30 20 25 22 38 2 54 5 07 15 34 19 51 ..... 22 27 6 7 48.0 23 17
Wed Jun 17/Thu Jun 18 1209.7 17 00 26 20 26 22 39 2 54 5 07 15 39 19 55 ..... 23 05 13 8 48.0 18 55
Thu Jun 18/Fri Jun 19 1210.7 17 04 23 20 26 22 39 2 54 5 07 15 43 19 59 ..... 23 35 22 9 42.9 13 32
Fri Jun 19/Sat Jun 20 1211.7 17 08 19 20 26 22 39 2 54 5 07 15 47 20 03 ..... 23 59 32 10 33.5 7 36
Sat Jun 20/Sun Jun 21 1212.7 17 12 16 20 27 22 40 2 54 5 07 15 52 20 07 ..... 0 20 42 11 21.1 1 27
Sun Jun 21/Mon Jun 22 1213.7 17 16 13 20 27 22 40 2 55 5 08 15 56 20 11 ..... 0 40 52 12 06.8 - 4 36
Mon Jun 22/Tue Jun 23 1214.7 17 20 09 20 27 22 40 2 55 5 08 16 00 20 15 ..... 1 00 62 12 52.0 -10 22
Tue Jun 23/Wed Jun 24 1215.7 17 24 06 20 27 22 40 2 55 5 08 16 04 20 20 ..... 1 22 72 13 37.8 -15 39
Wed Jun 24/Thu Jun 25 1216.7 17 28 02 20 27 22 40 2 56 5 09 16 08 20 24 ..... 1 46 80 14 24.9 -20 16
Thu Jun 25/Fri Jun 26 1217.7 17 31 59 20 27 22 40 2 56 5 09 16 12 20 29 ..... 2 15 87 15 14.0 -24 04
Fri Jun 26/Sat Jun 27 1218.7 17 35 55 20 27 22 40 2 57 5 09 16 16 20 33 18 00 2 50 93 16 05.4 -26 51
Sat Jun 27/Sun Jun 28 1219.7 17 39 52 20 27 22 40 2 57 5 10 16 19 20 38 19 01 3 33 97 16 58.5 -28 28
Sun Jun 28/Mon Jun 29 1220.7 17 43 48 20 27 22 39 2 58 5 10 16 23 20 42 19 55 4 24 99 17 52.7 -28 48
Mon Jun 29/Tue Jun 30 1221.7 17 47 45 20 27 22 39 2 59 5 11 16 27 20 47 20 42 5 22 100 18 46.8 -27 48
Tue Jun 30/Wed Jul 01 1222.7 17 51 42 20 27 22 39 3 00 5 11 16 30 20 52 21 21 6 25 99 19 39.6 -25 33
***** 2026 JULY *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Wed Jul 01/Thu Jul 02 1223.7 17 55 38 20 27 22 38 3 00 5 12 16 34 20 57 21 53 ..... 96 20 30.5 -22 11
Thu Jul 02/Fri Jul 03 1224.7 17 59 35 20 27 22 38 3 01 5 12 16 37 21 01 22 20 ..... 91 21 19.2 -17 51
Fri Jul 03/Sat Jul 04 1225.7 18 03 31 20 27 22 37 3 02 5 13 16 40 21 06 22 43 ..... 84 22 06.1 -12 46
Sat Jul 04/Sun Jul 05 1226.7 18 07 28 20 26 22 36 3 03 5 13 16 44 21 11 23 04 ..... 76 22 51.9 - 7 08
Sun Jul 05/Mon Jul 06 1227.7 18 11 24 20 26 22 36 3 04 5 14 16 47 21 16 23 24 ..... 67 23 37.4 - 1 09
Mon Jul 06/Tue Jul 07 1228.7 18 15 21 20 26 22 35 3 06 5 15 16 50 21 21 23 45 ..... 57 0 23.9 4 58
Tue Jul 07/Wed Jul 08 1229.7 18 19 17 20 25 22 34 3 07 5 15 16 53 21 26 0 07 ..... 46 1 12.6 11 00
Wed Jul 08/Thu Jul 09 1230.7 18 23 14 20 25 22 33 3 08 5 16 16 56 21 32 0 33 ..... 35 2 04.7 16 36
Thu Jul 09/Fri Jul 10 1231.7 18 27 11 20 25 22 32 3 09 5 17 16 59 21 37 1 06 ..... 24 3 01.2 21 25
Fri Jul 10/Sat Jul 11 1232.7 18 31 07 20 24 22 31 3 10 5 18 17 02 21 42 1 48 ..... 15 4 02.6 25 00
Sat Jul 11/Sun Jul 12 1233.7 18 35 04 20 24 22 30 3 12 5 18 17 05 21 47 2 44 18 10 7 5 08.0 26 53
Sun Jul 12/Mon Jul 13 1234.7 18 39 00 20 23 22 29 3 13 5 19 17 08 21 53 3 53 19 19 2 6 15.2 26 47
Mon Jul 13/Tue Jul 14 1235.7 18 42 57 20 22 22 28 3 14 5 20 17 11 21 58 5 12 20 15 0 7 21.2 24 40
Tue Jul 14/Wed Jul 15 1236.7 18 46 53 20 22 22 27 3 16 5 21 17 13 22 03 ..... 20 58 1 8 23.6 20 49
Wed Jul 15/Thu Jul 16 1237.7 18 50 50 20 21 22 26 3 17 5 22 17 16 22 09 ..... 21 32 4 9 21.3 15 40
Thu Jul 16/Fri Jul 17 1238.7 18 54 46 20 21 22 24 3 19 5 23 17 19 22 14 ..... 21 59 10 10 14.5 9 45
Fri Jul 17/Sat Jul 18 1239.7 18 58 43 20 20 22 23 3 20 5 23 17 21 22 19 ..... 22 22 18 11 04.1 3 30
Sat Jul 18/Sun Jul 19 1240.7 19 02 40 20 19 22 22 3 22 5 24 17 24 22 25 ..... 22 43 27 11 51.3 - 2 46
Sun Jul 19/Mon Jul 20 1241.7 19 06 36 20 18 22 20 3 23 5 25 17 27 22 30 ..... 23 03 37 12 37.5 - 8 45
Mon Jul 20/Tue Jul 21 1242.7 19 10 33 20 18 22 19 3 25 5 26 17 29 22 36 ..... 23 25 47 13 23.6 -14 16
Tue Jul 21/Wed Jul 22 1243.7 19 14 29 20 17 22 17 3 26 5 27 17 32 22 41 ..... 23 49 57 14 10.7 -19 08
Wed Jul 22/Thu Jul 23 1244.7 19 18 26 20 16 22 16 3 28 5 28 17 34 22 47 ..... 0 16 66 14 59.5 -23 11
Thu Jul 23/Fri Jul 24 1245.7 19 22 22 20 15 22 14 3 30 5 29 17 36 22 52 ..... 0 49 75 15 50.2 -26 16
Fri Jul 24/Sat Jul 25 1246.7 19 26 19 20 14 22 13 3 31 5 30 17 39 22 58 ..... 1 29 82 16 42.8 -28 12
Sat Jul 25/Sun Jul 26 1247.7 19 30 15 20 13 22 11 3 33 5 31 17 41 23 04 17 50 2 18 89 17 36.8 -28 53
Sun Jul 26/Mon Jul 27 1248.7 19 34 12 20 12 22 10 3 34 5 32 17 43 23 09 18 40 3 14 94 18 31.0 -28 15
Mon Jul 27/Tue Jul 28 1249.7 19 38 09 20 11 22 08 3 36 5 33 17 46 23 15 19 21 4 15 98 19 24.4 -26 19
Tue Jul 28/Wed Jul 29 1250.7 19 42 05 20 10 22 06 3 38 5 34 17 48 23 20 19 56 5 21 100 20 16.2 -23 11
Wed Jul 29/Thu Jul 30 1251.7 19 46 02 20 09 22 05 3 39 5 35 17 50 23 26 20 24 6 27 100 21 06.0 -19 02
Thu Jul 30/Fri Jul 31 1252.7 19 49 58 20 08 22 03 3 41 5 36 17 52 23 31 20 49 ..... 98 21 53.9 -14 03
Fri Jul 31/Sat Aug 01 1253.7 19 53 55 20 07 22 01 3 43 5 37 17 55 23 37 21 10 ..... 94 22 40.3 - 8 27
***** 2026 AUGUST *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Sat Aug 01/Sun Aug 02 1254.7 19 57 51 20 06 21 59 3 44 5 38 17 57 23 43 21 30 ..... 88 23 26.2 - 2 27
Sun Aug 02/Mon Aug 03 1255.7 20 01 48 20 04 21 57 3 46 5 39 17 59 23 48 21 50 ..... 80 0 12.6 3 42
Mon Aug 03/Tue Aug 04 1256.7 20 05 44 20 03 21 56 3 47 5 40 18 01 23 54 22 12 ..... 70 1 00.4 9 46
Tue Aug 04/Wed Aug 05 1257.7 20 09 41 20 02 21 54 3 49 5 41 18 03 23 59 22 36 ..... 60 1 51.0 15 27
Wed Aug 05/Thu Aug 06 1258.7 20 13 38 20 01 21 52 3 51 5 42 18 05 0 05 23 05 ..... 49 2 45.3 20 25
Thu Aug 06/Fri Aug 07 1259.7 20 17 34 20 00 21 50 3 52 5 43 18 07 0 11 23 42 ..... 37 3 43.9 24 17
Fri Aug 07/Sat Aug 08 1260.7 20 21 31 19 58 21 48 3 54 5 44 18 09 0 16 0 30 ..... 27 4 46.6 26 40
Sat Aug 08/Sun Aug 09 1261.7 20 25 27 19 57 21 46 3 56 5 45 18 11 0 22 1 32 ..... 17 5 51.7 27 13
Sun Aug 09/Mon Aug 10 1262.7 20 29 24 19 56 21 44 3 57 5 46 18 13 0 27 2 45 18 03 9 6 56.9 25 49
Mon Aug 10/Tue Aug 11 1263.7 20 33 20 19 54 21 43 3 59 5 47 18 15 0 33 4 06 18 51 3 7 59.7 22 37
Tue Aug 11/Wed Aug 12 1264.7 20 37 17 19 53 21 41 4 01 5 48 18 17 0 38 5 27 19 28 0 8 58.7 17 57
Wed Aug 12/Thu Aug 13 1265.7 20 41 13 19 51 21 39 4 02 5 49 18 19 0 44 ..... 19 58 0 9 53.5 12 16
Thu Aug 13/Fri Aug 14 1266.7 20 45 10 19 50 21 37 4 04 5 50 18 21 0 50 ..... 20 23 3 10 44.7 6 03
Fri Aug 14/Sat Aug 15 1267.7 20 49 07 19 49 21 35 4 05 5 51 18 23 0 55 ..... 20 45 7 11 33.3 - 0 21
Sat Aug 15/Sun Aug 16 1268.7 20 53 03 19 47 21 33 4 07 5 53 18 25 1 01 ..... 21 06 14 12 20.5 - 6 34
Sun Aug 16/Mon Aug 17 1269.7 20 57 00 19 46 21 31 4 08 5 54 18 27 1 06 ..... 21 27 22 13 07.3 -12 23
Mon Aug 17/Tue Aug 18 1270.7 21 00 56 19 44 21 29 4 10 5 55 18 29 1 12 ..... 21 50 31 13 54.6 -17 34
Tue Aug 18/Wed Aug 19 1271.7 21 04 53 19 43 21 27 4 12 5 56 18 31 1 17 ..... 22 16 40 14 43.3 -21 57
Wed Aug 19/Thu Aug 20 1272.7 21 08 49 19 41 21 25 4 13 5 57 18 33 1 23 ..... 22 48 50 15 33.7 -25 23
Thu Aug 20/Fri Aug 21 1273.7 21 12 46 19 40 21 23 4 15 5 58 18 35 1 28 ..... 23 25 60 16 25.9 -27 41
Fri Aug 21/Sat Aug 22 1274.7 21 16 42 19 38 21 21 4 16 5 59 18 37 1 34 ..... 0 10 69 17 19.4 -28 46
Sat Aug 22/Sun Aug 23 1275.7 21 20 39 19 37 21 19 4 18 6 00 18 39 1 39 ..... 1 04 77 18 13.5 -28 33
Sun Aug 23/Mon Aug 24 1276.7 21 24 36 19 35 21 17 4 19 6 01 18 41 1 45 17 19 2 04 85 19 07.1 -27 01
Mon Aug 24/Tue Aug 25 1277.7 21 28 32 19 33 21 15 4 21 6 02 18 43 1 50 17 56 3 08 91 19 59.4 -24 16
Tue Aug 25/Wed Aug 26 1278.7 21 32 29 19 32 21 13 4 22 6 03 18 45 1 55 18 27 4 15 96 20 50.0 -20 24
Wed Aug 26/Thu Aug 27 1279.7 21 36 25 19 30 21 11 4 24 6 04 18 46 2 01 18 52 5 22 99 21 38.8 -15 36
Thu Aug 27/Fri Aug 28 1280.7 21 40 22 19 28 21 08 4 25 6 05 18 48 2 06 19 15 6 29 100 22 26.2 -10 05
Fri Aug 28/Sat Aug 29 1281.7 21 44 18 19 27 21 06 4 27 6 06 18 50 2 12 19 36 ..... 99 23 13.0 - 4 05
Sat Aug 29/Sun Aug 30 1282.7 21 48 15 19 25 21 04 4 28 6 07 18 52 2 17 19 56 ..... 96 24 00.0 2 11
Sun Aug 30/Mon Aug 31 1283.7 21 52 11 19 23 21 02 4 29 6 08 18 54 2 22 20 17 ..... 90 0 48.2 8 24
Mon Aug 31/Tue Sep 01 1284.7 21 56 08 19 22 21 00 4 31 6 09 18 56 2 28 20 41 ..... 83 1 38.7 14 18
***** 2026 SEPTEMBER *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Tue Sep 01/Wed Sep 02 1285.7 22 00 05 19 20 20 58 4 32 6 10 18 58 2 33 21 08 ..... 73 2 32.5 19 30
Wed Sep 02/Thu Sep 03 1286.7 22 04 01 19 18 20 56 4 34 6 12 19 00 2 38 21 42 ..... 63 3 30.1 23 40
Thu Sep 03/Fri Sep 04 1287.7 22 07 58 19 17 20 54 4 35 6 13 19 02 2 44 22 26 ..... 51 4 31.3 26 23
Fri Sep 04/Sat Sep 05 1288.7 22 11 54 19 15 20 52 4 36 6 14 19 04 2 49 23 22 ..... 40 5 34.9 27 24
Sat Sep 05/Sun Sep 06 1289.7 22 15 51 19 13 20 50 4 38 6 15 19 05 2 54 0 29 ..... 29 6 38.8 26 33
Sun Sep 06/Mon Sep 07 1290.7 22 19 47 19 12 20 48 4 39 6 16 19 07 3 00 1 45 ..... 19 7 40.9 23 55
Mon Sep 07/Tue Sep 08 1291.7 22 23 44 19 10 20 46 4 40 6 17 19 09 3 05 3 04 17 26 11 8 39.7 19 46
Tue Sep 08/Wed Sep 09 1292.7 22 27 40 19 08 20 44 4 42 6 18 19 11 3 10 4 22 17 58 5 9 34.8 14 30
Wed Sep 09/Thu Sep 10 1293.7 22 31 37 19 06 20 42 4 43 6 19 19 13 3 15 5 37 18 24 1 10 26.4 8 31
Thu Sep 10/Fri Sep 11 1294.7 22 35 34 19 05 20 40 4 44 6 20 19 15 3 21 6 49 18 47 0 11 15.4 2 12
Fri Sep 11/Sat Sep 12 1295.7 22 39 30 19 03 20 38 4 46 6 21 19 17 3 26 ..... 19 08 1 12 03.0 - 4 07
Sat Sep 12/Sun Sep 13 1296.7 22 43 27 19 01 20 36 4 47 6 22 19 19 3 31 ..... 19 29 5 12 50.1 -10 08
Sun Sep 13/Mon Sep 14 1297.7 22 47 23 18 59 20 34 4 48 6 23 19 21 3 36 ..... 19 52 10 13 37.5 -15 37
Mon Sep 14/Tue Sep 15 1298.7 22 51 20 18 58 20 32 4 50 6 24 19 23 3 42 ..... 20 17 17 14 26.2 -20 20
Tue Sep 15/Wed Sep 16 1299.7 22 55 16 18 56 20 30 4 51 6 25 19 25 3 47 ..... 20 46 25 15 16.3 -24 08
Wed Sep 16/Thu Sep 17 1300.7 22 59 13 18 54 20 28 4 52 6 26 19 27 3 52 ..... 21 21 34 16 08.2 -26 51
Thu Sep 17/Fri Sep 18 1301.7 23 03 09 18 52 20 26 4 53 6 27 19 29 3 57 ..... 22 04 43 17 01.3 -28 21
Fri Sep 18/Sat Sep 19 1302.7 23 07 06 18 51 20 24 4 55 6 28 19 31 4 02 ..... 22 54 52 17 55.0 -28 34
Sat Sep 19/Sun Sep 20 1303.7 23 11 03 18 49 20 22 4 56 6 29 19 33 4 08 ..... 23 51 62 18 48.4 -27 30
Sun Sep 20/Mon Sep 21 1304.7 23 14 59 18 47 20 20 4 57 6 30 19 35 4 13 ..... 0 53 71 19 40.7 -25 11
Mon Sep 21/Tue Sep 22 1305.7 23 18 56 18 45 20 18 4 58 6 32 19 37 4 18 ..... 1 59 79 20 31.5 -21 44
Tue Sep 22/Wed Sep 23 1306.7 23 22 52 18 43 20 17 4 59 6 33 19 39 4 23 16 54 3 05 87 21 20.7 -17 18
Wed Sep 23/Thu Sep 24 1307.7 23 26 49 18 42 20 15 5 01 6 34 19 41 4 28 17 18 4 13 93 22 08.5 -12 03
Thu Sep 24/Fri Sep 25 1308.7 23 30 45 18 40 20 13 5 02 6 35 19 43 4 33 17 40 5 20 97 22 55.8 - 6 10
Fri Sep 25/Sat Sep 26 1309.7 23 34 42 18 38 20 11 5 03 6 36 19 45 4 39 18 00 6 30 100 23 43.3 0 06
Sat Sep 26/Sun Sep 27 1310.7 23 38 38 18 36 20 09 5 04 6 37 19 47 4 44 18 21 ..... 100 0 32.0 6 29
Sun Sep 27/Mon Sep 28 1311.7 23 42 35 18 35 20 07 5 05 6 38 19 49 4 49 18 44 ..... 97 1 23.0 12 39
Mon Sep 28/Tue Sep 29 1312.7 23 46 32 18 33 20 05 5 07 6 39 19 51 4 54 19 11 ..... 92 2 17.2 18 13
Tue Sep 29/Wed Sep 30 1313.7 23 50 28 18 31 20 03 5 08 6 40 19 53 4 59 19 44 ..... 85 3 15.1 22 47
Wed Sep 30/Thu Oct 01 1314.7 23 54 25 18 29 20 02 5 09 6 41 19 55 5 04 20 25 ..... 76 4 16.7 25 57
***** 2026 OCTOBER *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Thu Oct 01/Fri Oct 02 1315.7 23 58 21 18 28 20 00 5 10 6 42 19 58 5 09 21 17 ..... 65 5 20.7 27 22
Fri Oct 02/Sat Oct 03 1316.7 0 02 18 18 26 19 58 5 11 6 43 20 00 5 14 22 21 ..... 54 6 24.9 26 56
Sat Oct 03/Sun Oct 04 1317.7 0 06 14 18 24 19 56 5 12 6 45 20 02 5 19 23 34 ..... 42 7 27.1 24 42
Sun Oct 04/Mon Oct 05 1318.7 0 10 11 18 23 19 55 5 13 6 46 20 04 5 24 0 50 ..... 31 8 25.9 20 57
Mon Oct 05/Tue Oct 06 1319.7 0 14 07 18 21 19 53 5 15 6 47 20 06 5 30 2 07 ..... 22 9 20.8 16 03
Tue Oct 06/Wed Oct 07 1320.7 0 18 04 18 19 19 51 5 16 6 48 20 08 5 35 3 21 16 27 13 10 12.1 10 22
Wed Oct 07/Thu Oct 08 1321.7 0 22 01 18 17 19 49 5 17 6 49 20 11 5 40 4 32 16 50 7 11 00.9 4 16
Thu Oct 08/Fri Oct 09 1322.7 0 25 57 18 16 19 48 5 18 6 50 20 13 5 45 5 42 17 11 2 11 48.0 - 1 57
Fri Oct 09/Sat Oct 10 1323.7 0 29 54 18 14 19 46 5 19 6 51 20 15 5 50 6 50 17 32 0 12 34.7 - 8 00
Sat Oct 10/Sun Oct 11 1324.7 0 33 50 18 12 19 44 5 20 6 52 20 17 5 55 ..... 17 54 0 13 21.7 -13 38
Sun Oct 11/Mon Oct 12 1325.7 0 37 47 18 11 19 43 5 21 6 54 20 20 6 00 ..... 18 18 3 14 09.8 -18 36
Mon Oct 12/Tue Oct 13 1326.7 0 41 43 18 09 19 41 5 22 6 55 20 22 6 05 ..... 18 46 7 14 59.5 -22 43
Tue Oct 13/Wed Oct 14 1327.7 0 45 40 18 07 19 40 5 24 6 56 20 24 6 10 ..... 19 19 12 15 50.9 -25 48
Wed Oct 14/Thu Oct 15 1328.7 0 49 36 18 06 19 38 5 25 6 57 20 27 6 15 ..... 19 58 19 16 43.7 -27 41
Thu Oct 15/Fri Oct 16 1329.7 0 53 33 18 04 19 36 5 26 6 58 20 29 6 20 ..... 20 46 27 17 37.2 -28 19
Fri Oct 16/Sat Oct 17 1330.7 0 57 30 18 03 19 35 5 27 6 59 20 32 6 25 ..... 21 40 35 18 30.3 -27 40
Sat Oct 17/Sun Oct 18 1331.7 1 01 26 18 01 19 33 5 28 7 00 20 34 6 30 ..... 22 40 45 19 22.4 -25 48
Sun Oct 18/Mon Oct 19 1332.7 1 05 23 18 00 19 32 5 29 7 02 20 36 6 35 ..... 23 43 54 20 13.0 -22 48
Mon Oct 19/Tue Oct 20 1333.7 1 09 19 17 58 19 30 5 30 7 03 20 39 6 41 ..... 0 49 64 21 01.8 -18 47
Tue Oct 20/Wed Oct 21 1334.7 1 13 16 17 57 19 29 5 31 7 04 20 41 6 46 ..... 1 54 73 21 49.3 -13 56
Wed Oct 21/Thu Oct 22 1335.7 1 17 12 17 55 19 27 5 32 7 05 20 44 6 51 ..... 3 01 81 22 36.0 - 8 23
Thu Oct 22/Fri Oct 23 1336.7 1 21 09 17 54 19 26 5 34 7 06 20 46 6 56 16 02 4 09 89 23 23.0 - 2 20
Fri Oct 23/Sat Oct 24 1337.7 1 25 05 17 52 19 25 5 35 7 08 20 49 7 01 16 23 5 19 95 0 11.1 4 00
Sat Oct 24/Sun Oct 25 1338.7 1 29 02 17 51 19 23 5 36 7 09 20 52 7 06 16 45 6 33 99 1 01.6 10 19
Sun Oct 25/Mon Oct 26 1339.7 1 32 59 17 49 19 22 5 37 7 10 20 54 7 11 17 11 7 50 100 1 55.5 16 15
Mon Oct 26/Tue Oct 27 1340.7 1 36 55 17 48 19 21 5 38 7 11 20 57 7 16 17 42 ..... 98 2 53.8 21 20
Tue Oct 27/Wed Oct 28 1341.7 1 40 52 17 46 19 19 5 39 7 12 21 00 7 21 18 21 ..... 94 3 56.3 25 06
Wed Oct 28/Thu Oct 29 1342.7 1 44 48 17 45 19 18 5 40 7 14 21 02 7 26 19 10 ..... 87 5 01.9 27 07
Thu Oct 29/Fri Oct 30 1343.7 1 48 45 17 44 19 17 5 41 7 15 21 05 7 31 20 12 ..... 79 6 08.2 27 10
Fri Oct 30/Sat Oct 31 1344.7 1 52 41 17 42 19 16 5 42 7 16 21 08 7 36 21 24 ..... 68 7 12.7 25 18
Sat Oct 31/Sun Nov 01* 1345.7 1 56 38 17 41 19 15 4 43 6 17 21 10 7 41 22 41 ..... 57 8 13.2 21 49
***** 2026 NOVEMBER *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Sun Nov 01/Mon Nov 02 1346.7 3 00 44 16 40 18 13 4 45 6 19 21 13 7 46 22 57 ..... 45 9 11.7 16 57
Mon Nov 02/Tue Nov 03 1347.7 3 04 41 16 38 18 12 4 46 6 20 21 16 7 51 0 11 ..... 34 10 03.6 11 23
Tue Nov 03/Wed Nov 04 1348.7 3 08 37 16 37 18 11 4 47 6 21 21 19 7 56 1 22 ..... 25 10 52.4 5 24
Wed Nov 04/Thu Nov 05 1349.7 3 12 34 16 36 18 10 4 48 6 22 21 22 8 01 2 31 ..... 16 11 39.2 - 0 42
Thu Nov 05/Fri Nov 06 1350.7 3 16 30 16 35 18 09 4 49 6 24 21 25 8 06 3 38 ..... 9 12 25.3 - 6 41
Fri Nov 06/Sat Nov 07 1351.7 3 20 27 16 34 18 08 4 50 6 25 21 28 8 11 4 46 ..... 4 13 11.6 -12 18
Sat Nov 07/Sun Nov 08 1352.7 3 24 24 16 33 18 07 4 51 6 26 21 31 8 16 5 53 ..... 1 13 58.9 -17 21
Sun Nov 08/Mon Nov 09 1353.7 3 28 20 16 31 18 06 4 52 6 27 21 34 8 21 7 00 15 47 0 14 47.9 -21 36
Mon Nov 09/Tue Nov 10 1354.7 3 32 17 16 30 18 05 4 53 6 29 21 37 8 26 8 05 16 18 1 15 38.7 -24 53
Tue Nov 10/Wed Nov 11 1355.7 3 36 13 16 29 18 04 4 54 6 30 21 40 8 31 ..... 16 55 4 16 31.0 -27 01
Wed Nov 11/Thu Nov 12 1356.7 3 40 10 16 28 18 04 4 55 6 31 21 43 8 36 ..... 17 40 8 17 24.1 -27 56
Thu Nov 12/Fri Nov 13 1357.7 3 44 06 16 27 18 03 4 56 6 32 21 46 8 41 ..... 18 32 14 18 17.1 -27 34
Fri Nov 13/Sat Nov 14 1358.7 3 48 03 16 26 18 02 4 58 6 33 21 49 8 46 ..... 19 30 20 19 09.0 -25 59
Sat Nov 14/Sun Nov 15 1359.7 3 51 59 16 25 18 01 4 59 6 35 21 52 8 51 ..... 20 32 28 19 59.1 -23 18
Sun Nov 15/Mon Nov 16 1360.7 3 55 56 16 25 18 01 5 00 6 36 21 56 8 56 ..... 21 35 37 20 47.3 -19 38
Mon Nov 16/Tue Nov 17 1361.7 3 59 53 16 24 18 00 5 01 6 37 21 59 9 01 ..... 22 39 47 21 33.9 -15 08
Tue Nov 17/Wed Nov 18 1362.7 4 03 49 16 23 17 59 5 02 6 38 22 02 9 06 ..... 23 44 56 22 19.5 - 9 57
Wed Nov 18/Thu Nov 19 1363.7 4 07 46 16 22 17 59 5 03 6 40 22 05 9 11 ..... 0 49 66 23 04.8 - 4 15
Thu Nov 19/Fri Nov 20 1364.7 4 11 42 16 21 17 58 5 04 6 41 22 09 9 16 ..... 1 57 76 23 51.1 1 48
Fri Nov 20/Sat Nov 21 1365.7 4 15 39 16 21 17 58 5 05 6 42 22 12 9 21 ..... 3 07 84 0 39.5 7 59
Sat Nov 21/Sun Nov 22 1366.7 4 19 35 16 20 17 57 5 06 6 43 22 16 9 26 ..... 4 22 92 1 31.4 14 00
Sun Nov 22/Mon Nov 23 1367.7 4 23 32 16 19 17 57 5 07 6 44 22 19 9 31 ..... 5 41 97 2 27.8 19 27
Mon Nov 23/Tue Nov 24 1368.7 4 27 28 16 19 17 56 5 08 6 46 22 23 9 36 ..... 7 01 100 3 29.4 23 49
Tue Nov 24/Wed Nov 25 1369.7 4 31 25 16 18 17 56 5 09 6 47 22 26 9 41 15 57 8 19 99 4 35.7 26 35
Wed Nov 25/Thu Nov 26 1370.7 4 35 22 16 17 17 55 5 10 6 48 22 30 9 46 16 55 ..... 96 5 44.4 27 21
Thu Nov 26/Fri Nov 27 1371.7 4 39 18 16 17 17 55 5 11 6 49 22 33 9 51 18 06 ..... 90 6 52.5 26 01
Fri Nov 27/Sat Nov 28 1372.7 4 43 15 16 16 17 55 5 12 6 50 22 37 9 56 19 25 ..... 82 7 56.9 22 48
Sat Nov 28/Sun Nov 29 1373.7 4 47 11 16 16 17 54 5 13 6 51 22 41 10 01 20 44 ..... 72 8 56.3 18 10
Sun Nov 29/Mon Nov 30 1374.7 4 51 08 16 16 17 54 5 14 6 52 22 44 10 06 22 01 ..... 61 9 50.7 12 37
Mon Nov 30/Tue Dec 01 1375.7 4 55 04 16 15 17 54 5 15 6 53 22 48 10 10 23 14 ..... 50 10 41.1 6 36
***** 2026 DECEMBER *****
Calendar for Whitin Observatory at Wellesley College, west longitude (h.m.s) = 4 45 13, latitude (d.m) = 42 17.7
Note that each line lists events of one night, spanning two calendar dates. Rise/set times are given
in Eastern time ( 5 hr W), for 40 m above surroundings, DAYLIGHT time used, * shows night clocks are reset.
Moon coords. and illum. are for local midnight, even if moon is down. Program: John Thorstensen, Dartmouth College.
Date (eve/morn) JDmid LMSTmidn ---------- Sun: --------- LST twilight: ------------- Moon: --------------
(2026 at start) (-2460000) set twi.end twi.beg rise eve morn rise set %illum RA Dec
Tue Dec 01/Wed Dec 02 1376.7 4 59 01 16 15 17 54 5 15 6 54 22 52 10 15 0 24 ..... 39 11 28.8 0 27
Wed Dec 02/Thu Dec 03 1377.7 5 02 57 16 15 17 54 5 16 6 55 22 56 10 20 1 31 ..... 29 12 15.1 - 5 34
Thu Dec 03/Fri Dec 04 1378.7 5 06 54 16 14 17 54 5 17 6 56 22 59 10 25 2 38 ..... 20 13 01.2 -11 14
Fri Dec 04/Sat Dec 05 1379.7 5 10 51 16 14 17 53 5 18 6 57 23 03 10 30 3 44 ..... 13 13 47.9 -16 21
Sat Dec 05/Sun Dec 06 1380.7 5 14 47 16 14 17 53 5 19 6 58 23 07 10 35 4 50 ..... 7 14 36.2 -20 43
Sun Dec 06/Mon Dec 07 1381.7 5 18 44 16 14 17 53 5 20 6 59 23 11 10 39 5 55 ..... 3 15 26.2 -24 10
Mon Dec 07/Tue Dec 08 1382.7 5 22 40 16 14 17 53 5 21 7 00 23 15 10 44 6 57 ..... 1 16 17.9 -26 32
Tue Dec 08/Wed Dec 09 1383.7 5 26 37 16 14 17 54 5 21 7 01 23 19 10 49 7 53 15 36 0 17 10.7 -27 43
Wed Dec 09/Thu Dec 10 1384.7 5 30 33 16 14 17 54 5 22 7 02 23 23 10 54 8 41 16 25 1 18 03.7 -27 37
Thu Dec 10/Fri Dec 11 1385.7 5 34 30 16 14 17 54 5 23 7 03 23 27 10 58 ..... 17 22 4 18 55.8 -26 18
Fri Dec 11/Sat Dec 12 1386.7 5 38 26 16 14 17 54 5 24 7 04 23 31 11 03 ..... 18 23 9 19 46.2 -23 52
Sat Dec 12/Sun Dec 13 1387.7 5 42 23 16 14 17 54 5 24 7 04 23 36 11 08 ..... 19 26 14 20 34.5 -20 26
Sun Dec 13/Mon Dec 14 1388.7 5 46 20 16 14 17 54 5 25 7 05 23 40 11 12 ..... 20 29 22 21 20.8 -16 11
Mon Dec 14/Tue Dec 15 1389.7 5 50 16 16 15 17 55 5 26 7 06 23 44 11 17 ..... 21 33 30 22 05.6 -11 16
Tue Dec 15/Wed Dec 16 1390.7 5 54 13 16 15 17 55 5 26 7 07 23 48 11 21 ..... 22 36 39 22 49.8 - 5 52
Wed Dec 16/Thu Dec 17 1391.7 5 58 09 16 15 17 55 5 27 7 07 23 53 11 26 ..... 23 40 49 23 34.2 - 0 06
Thu Dec 17/Fri Dec 18 1392.7 6 02 06 16 15 17 56 5 28 7 08 23 57 11 31 ..... 0 47 59 0 20.0 5 50
Fri Dec 18/Sat Dec 19 1393.7 6 06 02 16 16 17 56 5 28 7 09 0 01 11 35 ..... 1 57 69 1 08.5 11 43
Sat Dec 19/Sun Dec 20 1394.7 6 09 59 16 16 17 57 5 29 7 09 0 06 11 40 ..... 3 12 79 2 01.1 17 15
Sun Dec 20/Mon Dec 21 1395.7 6 13 55 16 17 17 57 5 29 7 10 0 10 11 44 ..... 4 30 88 2 59.0 22 01
Mon Dec 21/Tue Dec 22 1396.7 6 17 52 16 17 17 57 5 30 7 10 0 14 11 49 ..... 5 49 94 4 02.3 25 31
Tue Dec 22/Wed Dec 23 1397.7 6 21 49 16 18 17 58 5 30 7 11 0 19 11 53 ..... 7 02 99 5 10.3 27 15
Wed Dec 23/Thu Dec 24 1398.7 6 25 45 16 18 17 59 5 31 7 11 0 23 11 57 15 39 8 04 100 6 20.0 26 51
Thu Dec 24/Fri Dec 25 1399.7 6 29 42 16 19 17 59 5 31 7 11 0 28 12 02 16 56 8 52 98 7 28.1 24 20
Fri Dec 25/Sat Dec 26 1400.7 6 33 38 16 19 18 00 5 31 7 12 0 32 12 06 18 19 ..... 93 8 32.0 20 03
Sat Dec 26/Sun Dec 27 1401.7 6 37 35 16 20 18 00 5 32 7 12 0 37 12 10 19 40 ..... 85 9 30.6 14 34
Sun Dec 27/Mon Dec 28 1402.7 6 41 31 16 21 18 01 5 32 7 12 0 42 12 15 20 58 ..... 76 10 24.4 8 23
Mon Dec 28/Tue Dec 29 1403.7 6 45 28 16 22 18 02 5 32 7 13 0 46 12 19 22 11 ..... 66 11 14.7 2 00
Tue Dec 29/Wed Dec 30 1404.7 6 49 24 16 22 18 02 5 33 7 13 0 51 12 23 23 21 ..... 55 12 02.7 - 4 16
Wed Dec 30/Thu Dec 31 1405.7 6 53 21 16 23 18 03 5 33 7 13 0 55 12 27 0 29 ..... 45 12 49.7 -10 09
Thu Dec 31/Fri Jan 01 1406.7 6 57 18 16 24 18 04 5 33 7 13 1 00 12 31 1 36 ..... 35 13 36.9 -15 27
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