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 MAR 01 18 37 19 15 19 40 17 00 06 23 05 28 05 54 06 32 05 58 10 19 15 48 9.8 0.0 0 1004 1245 08 MON MAR 02 18 37 19 15 19 41 17 57 06 59 05 28 05 53 06 31 06 03 10 23 15 52 9.8 0.0 0 1054 0635 15 TUE MAR 03 18 38 19 15 19 41 18 51 05 27 05 52 06 30 06 07 10 27 15 55 9.8 0.0 0 1141 0015 27 WED MAR 04 18 38 19 16 19 41 19 44 05 26 05 52 06 29 06 11 10 31 15 58 9.8 0.1 0 1227-0558 39 THU MAR 05 18 38 19 16 19 41 20 36 05 25 05 51 06 28 06 15 10 35 16 01 9.7 0.9 9 1313-1148 50 FRI MAR 06 18 39 19 16 19 42 21 27 05 25 05 50 06 28 06 20 10 39 16 05 9.7 1.8 18 1400-1702 62 SAT MAR 07 18 39 19 17 19 42 22 20 05 24 05 49 06 27 06 24 10 43 16 07 9.7 2.6 27 1448-2130 73 SUN MAR 08 18 39 19 17 19 42 23 13 05 23 05 49 06 26 06 28 10 47 16 10 9.7 3.5 36 1538-2454 84 MON MAR 09 18 40 19 17 19 43 00 07 05 22 05 48 06 25 06 33 10 50 16 13 9.6 4.4 45 1630-2720 >90 TUE MAR 10 18 40 19 17 19 43 01 00 05 21 05 47 06 24 06 37 10 54 16 16 9.6 5.3 54 1723-2830 >90 WED MAR 11 18 40 19 18 19 43 01 52 05 21 05 46 06 24 06 41 10 58 16 20 9.6 6.1 63 1817-2822 >90 THU MAR 12 18 40 19 18 19 44 02 41 05 20 05 45 06 23 06 46 11 02 16 23 9.6 6.9 72 1911-2654 >90 FRI MAR 13 18 41 19 18 19 44 03 27 14 05 05 19 05 44 06 22 06 50 11 06 16 26 9.6 7.7 80 2003-2411 >90 SAT MAR 14 18 41 19 19 19 44 04 09 15 01 05 18 05 44 06 21 06 53 11 10 16 29 9.6 8.4 87 2054-2018 >90 SUN MAR 15 18 41 19 19 19 44 04 48 15 57 05 17 05 43 06 20 06 57 11 14 16 32 9.5 9.1 94 2144-1526 >90 MON MAR 16 18 42 19 19 19 45 05 25 16 53 05 16 05 42 06 19 07 02 11 18 16 35 9.5 9.5 100 2232-0945 >90 TUE MAR 17 18 42 19 19 19 45 06 02 17 48 05 15 05 41 06 19 07 06 11 22 16 38 9.5 9.5 100 2320-0330 >90 WED MAR 18 18 42 19 20 19 45 06 39 18 45 05 15 05 40 06 18 07 10 11 26 16 42 9.5 9.5 100 0009 0301 >90 THU MAR 19 18 42 19 20 19 46 19 44 05 14 05 39 06 17 07 15 11 30 16 45 9.5 9.5 100 0059 0931 >90 FRI MAR 20 18 43 19 20 19 46 20 45 05 13 05 38 06 16 07 19 11 34 16 48 9.5 8.5 89 0151 1536 >90 SAT MAR 21 18 43 19 21 19 46 21 49 05 12 05 38 06 15 07 23 11 38 16 51 9.4 7.4 78 0247 2053 >90 SUN MAR 22 18 43 19 21 19 47 22 56 05 11 05 37 06 14 07 28 11 42 16 54 9.4 6.3 66 0347 2457 >90 MON MAR 23 18 44 19 21 19 47 00 03 05 10 05 36 06 13 07 32 11 46 16 57 9.4 5.1 54 0456 2649 >90 TUE MAR 24 18 44 19 21 19 47 01 07 05 09 05 35 06 12 07 36 11 50 16 59 9.4 4.0 43 0555 2802 80 WED MAR 25 18 44 19 22 19 47 02 05 05 08 05 34 06 12 07 40 11 54 17 02 9.4 3.0 32 0658 2649 67 THU MAR 26 18 44 19 22 19 48 02 57 05 07 05 33 06 11 07 45 11 57 17 05 9.3 2.2 23 0758 2354 55 FRI MAR 27 18 45 19 22 19 48 03 42 05 06 05 32 06 10 07 49 12 01 17 08 9.3 1.4 15 0855 1938 44 SAT MAR 28 18 45 19 23 19 48 14 52 04 22 05 05 05 31 06 09 07 53 12 05 17 11 9.3 0.7 7 0948 1422 33 SUN MAR 29 18 45 19 23 19 49 15 48 04 58 05 05 05 30 06 08 07 58 12 09 17 15 9.3 0.1 1 1037 0829 25 MON MAR 30 18 45 19 23 19 49 16 43 05 32 05 04 05 29 06 07 08 02 12 13 17 18 9.2 0.0 0 1124 0217 21 TUE MAR 31 18 46 19 24 19 49 17 35 06 06 05 03 05 29 06 06 08 06 12 17 17 21 9.2 0.0 0 1210-0355 24 ONE LINE REFERS TO EVENING DATE FULL MOON Mar 03 11:40 UT AND FOLLOWING MORNING. LAST QUARTER Mar 11 09:39 UT All dates and times are zone HST NEW MOON Mar 19 01:23 UT in upper table (except sid time). FIRST QUARTER Mar 25 19:18 UT