KECK OBSERVATORY CALENDAR FOR 2026 -ASTRONOMICAL (computed for altitude 4160.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) Zenith 2026 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 18 18 h h % h m d m deg SUN NOV 01 17 58 18 37 19 03 00 21 05 09 05 35 06 13 21 27 02 25 07 35 10.1 5.3 52 0923 1607 >90 MON NOV 02 17 58 18 36 19 02 01 20 05 09 05 35 06 13 21 30 02 29 07 39 10.1 6.3 62 1014 1028 >90 TUE NOV 03 17 57 18 36 19 02 02 15 14 29 05 09 05 35 06 14 21 34 02 33 07 43 10.1 7.2 71 1102 0427 >90 WED NOV 04 17 57 18 36 19 02 03 09 15 04 05 10 05 36 06 14 21 38 02 37 07 48 10.1 8.1 80 1149-0138 >90 THU NOV 05 17 56 18 35 19 01 04 02 15 39 05 10 05 36 06 15 21 41 02 41 07 51 10.2 9.0 88 1235-0733 >90 FRI NOV 06 17 56 18 35 19 01 04 55 16 14 05 11 05 37 06 15 21 45 02 45 07 56 10.2 9.9 97 1321-1303 >90 SAT NOV 07 17 56 18 34 19 01 05 48 16 51 05 11 05 37 06 16 21 49 02 49 08 00 10.2 10.2 100 1409-1757 >90 SUN NOV 08 17 55 18 34 19 00 06 43 17 31 05 11 05 38 06 16 21 52 02 52 08 04 10.2 10.2 100 1458-2201 >90 MON NOV 09 17 55 18 34 19 00 18 14 05 12 05 38 06 17 21 56 02 56 08 09 10.2 10.2 100 1549-2505 >90 TUE NOV 10 17 55 18 34 19 00 19 01 05 12 05 38 06 17 22 00 03 00 08 13 10.2 10.2 99 1641-2659 >90 WED NOV 11 17 54 18 33 18 59 19 51 05 13 05 39 06 18 22 02 03 04 08 18 10.2 9.4 91 1734-2739 >90 THU NOV 12 17 54 18 33 18 59 20 43 05 13 05 39 06 18 22 06 03 08 08 22 10.2 8.5 83 1827-2703 >90 FRI NOV 13 17 54 18 33 18 59 21 36 05 14 05 40 06 19 22 10 03 12 08 27 10.2 7.6 74 1918-2515 >90 SAT NOV 14 17 53 18 33 18 59 22 29 05 14 05 40 06 20 22 14 03 16 08 31 10.2 6.7 65 2008-2221 >90 SUN NOV 15 17 53 18 32 18 59 23 21 05 14 05 41 06 20 22 18 03 20 08 35 10.2 5.9 57 2056-1831 >90 MON NOV 16 17 53 18 32 18 59 00 12 05 15 05 41 06 21 22 22 03 24 08 40 10.3 5.0 49 2145-1337 90 TUE NOV 17 17 53 18 32 18 59 01 03 05 15 05 42 06 21 22 26 03 28 08 44 10.3 4.2 40 2228-0831 79 WED NOV 18 17 53 18 32 18 58 01 55 05 16 05 42 06 22 22 29 03 32 08 49 10.3 3.4 32 2314-0245 67 THU NOV 19 17 52 18 32 18 58 02 48 05 16 05 43 06 22 22 33 03 36 08 53 10.3 2.5 23 0001 0324 55 FRI NOV 20 17 52 18 32 18 58 14 34 03 45 05 17 05 43 06 23 22 37 03 40 08 58 10.3 1.5 14 0050 0937 42 SAT NOV 21 17 52 18 32 18 58 15 13 04 45 05 17 05 44 06 24 22 41 03 44 09 02 10.3 0.5 5 0143 1535 29 SUN NOV 22 17 52 18 32 18 58 15 56 05 51 05 18 05 45 06 24 22 45 03 48 09 07 10.3 0.0 0 0240 2051 16 MON NOV 23 17 52 18 32 18 58 16 47 05 18 05 45 06 25 22 49 03 52 09 10 10.3 0.0 0 0343 2456 05 TUE NOV 24 17 52 18 32 18 58 17 44 05 19 05 46 06 25 22 53 03 56 09 15 10.3 0.0 0 0450 2718 15 WED NOV 25 17 52 18 32 18 58 18 50 05 19 05 46 06 26 22 57 03 59 09 19 10.3 0.0 0 0559 2737 28 THU NOV 26 17 52 18 32 18 59 19 59 05 20 05 47 06 27 23 02 04 03 09 24 10.3 1.0 9 0707 2551 43 FRI NOV 27 17 52 18 32 18 59 21 07 05 21 05 47 06 27 23 06 04 07 09 29 10.4 2.1 20 0810 2217 56 SAT NOV 28 17 52 18 32 18 59 22 13 05 21 05 48 06 28 23 09 04 11 09 33 10.4 3.2 31 0909 1724 70 SUN NOV 29 17 52 18 32 18 59 23 14 05 22 05 48 06 28 23 13 04 15 09 38 10.4 4.2 40 1002 1140 83 MON NOV 30 17 52 18 32 18 59 00 11 05 22 05 49 06 29 23 17 04 19 09 42 10.4 5.2 50 1052 0538 >90 ONE LINE REFERS TO EVENING DATE LAST QUARTER Nov 01 20:28 UT AND FOLLOWING MORNING. NEW MOON Nov 09 06:59 UT All dates and times are zone HST FIRST QUARTER Nov 17 11:48 UT in upper table (except sid time). FULL MOON Nov 24 14:55 UT