KECK OBSERVATORY CALENDAR FOR 2023 -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 2023 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 WED MAR 01 18 37 19 15 19 40 03 53 05 28 05 54 06 32 05 57 10 18 15 47 9.8 1.6 16 0707 2716 44 THU MAR 02 18 37 19 15 19 41 14 29 04 39 05 28 05 53 06 31 06 02 10 22 15 51 9.8 0.8 8 0800 2539 33 FRI MAR 03 18 38 19 15 19 41 15 22 05 21 05 27 05 52 06 30 06 06 10 26 15 54 9.8 0.1 1 0851 2251 22 SAT MAR 04 18 38 19 16 19 41 16 15 05 59 05 26 05 52 06 29 06 10 10 30 15 57 9.8 0.0 0 0940 1904 12 SUN MAR 05 18 38 19 16 19 41 17 08 06 34 05 25 05 51 06 28 06 14 10 34 16 00 9.7 0.0 0 1027 1427 06 MON MAR 06 18 39 19 16 19 42 17 58 05 25 05 50 06 28 06 19 10 38 16 03 9.7 0.0 0 1112 0913 14 TUE MAR 07 18 39 19 17 19 42 18 48 05 24 05 49 06 27 06 23 10 41 16 06 9.7 0.0 0 1157 0333 25 WED MAR 08 18 39 19 17 19 42 19 38 05 23 05 49 06 26 06 27 10 45 16 09 9.7 0.0 0 1242-0219 36 THU MAR 09 18 40 19 17 19 43 20 29 05 22 05 48 06 25 06 32 10 49 16 12 9.6 0.8 7 1327-0811 48 FRI MAR 10 18 40 19 17 19 43 21 22 05 21 05 47 06 24 06 36 10 53 16 15 9.6 1.6 17 1415-1348 60 SAT MAR 11 18 40 19 18 19 43 22 18 05 21 05 46 06 24 06 40 10 57 16 19 9.6 2.6 26 1505-1853 72 SUN MAR 12 18 40 19 18 19 44 23 17 05 20 05 45 06 23 06 45 11 01 16 22 9.6 3.5 36 1558-2304 84 MON MAR 13 18 41 19 18 19 44 00 18 05 19 05 44 06 22 06 48 11 05 16 25 9.6 4.6 47 1657-2613 >90 TUE MAR 14 18 41 19 19 19 44 01 21 05 18 05 44 06 21 06 52 11 09 16 28 9.6 5.6 58 1758-2749 >90 WED MAR 15 18 41 19 19 19 44 02 24 05 17 05 43 06 20 06 56 11 13 16 31 9.5 6.7 69 1902-2742 >90 THU MAR 16 18 42 19 19 19 45 03 22 05 16 05 42 06 19 07 01 11 17 16 34 9.5 7.6 80 2005-2545 >90 FRI MAR 17 18 42 19 19 19 45 04 15 14 55 05 15 05 41 06 19 07 05 11 21 16 37 9.5 8.5 89 2106-2208 >90 SAT MAR 18 18 42 19 20 19 45 05 03 16 01 05 15 05 40 06 18 07 09 11 25 16 41 9.5 9.3 97 2204-1708 >90 SUN MAR 19 18 42 19 20 19 46 05 46 17 05 05 14 05 39 06 17 07 14 11 29 16 44 9.5 9.5 100 2259-1109 >90 MON MAR 20 18 43 19 20 19 46 06 26 18 07 05 13 05 38 06 16 07 18 11 33 16 47 9.5 9.5 100 2351-0438 >90 TUE MAR 21 18 43 19 21 19 46 19 07 05 12 05 38 06 15 07 22 11 37 16 50 9.4 9.4 100 0042 0202 >90 WED MAR 22 18 43 19 21 19 47 20 06 05 11 05 37 06 14 07 27 11 41 16 52 9.4 9.1 96 0132 0827 >90 THU MAR 23 18 44 19 21 19 47 21 05 05 10 05 36 06 13 07 31 11 45 16 55 9.4 8.1 86 0222 1419 >90 FRI MAR 24 18 44 19 21 19 47 22 03 05 09 05 35 06 12 07 35 11 49 16 58 9.4 7.1 75 0314 1921 >90 SAT MAR 25 18 44 19 22 19 47 23 02 05 08 05 34 06 12 07 39 11 52 17 01 9.4 6.1 65 0406 2319 >90 SUN MAR 26 18 44 19 22 19 48 00 00 05 07 05 33 06 11 07 44 11 56 17 04 9.3 5.1 54 0500 2603 >90 MON MAR 27 18 45 19 22 19 48 00 55 05 06 05 32 06 10 07 48 12 00 17 07 9.3 4.2 44 0556 2725 82 TUE MAR 28 18 45 19 23 19 48 01 48 05 05 05 31 06 09 07 52 12 04 17 10 9.3 3.3 35 0650 2730 71 WED MAR 29 18 45 19 23 19 49 02 35 05 05 05 30 06 08 07 57 12 08 17 14 9.3 2.5 26 0743 2616 61 THU MAR 30 18 45 19 23 19 49 03 18 05 04 05 29 06 07 08 00 12 12 17 17 9.2 1.8 19 0835 2350 50 FRI MAR 31 18 46 19 24 19 49 14 08 03 57 05 03 05 29 06 06 08 04 12 16 17 20 9.2 1.1 11 0924 2020 40 ONE LINE REFERS TO EVENING DATE FULL MOON Mar 07 12:43 UT AND FOLLOWING MORNING. LAST QUARTER Mar 15 02:10 UT All dates and times are zone HST NEW MOON Mar 21 17:23 UT in upper table (except sid time). FIRST QUARTER Mar 29 02:32 UT