KECK OBSERVATORY CALENDAR FOR 2024 -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 2024 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 MON APR 01 18 46 19 24 19 50 01 28 05 01 05 27 06 05 08 12 12 23 17 25 9.2 5.6 61 1919-2751 >90 TUE APR 02 18 47 19 24 19 51 02 22 05 00 05 26 06 04 08 17 12 27 17 28 9.1 6.5 71 2019-2510 >90 WED APR 03 18 47 19 25 19 51 03 11 04 59 05 25 06 03 08 21 12 31 17 31 9.1 7.3 80 2117-2056 >90 THU APR 04 18 47 19 25 19 51 03 56 15 00 04 58 05 24 06 02 08 25 12 35 17 34 9.1 8.1 88 2213-1526 >90 FRI APR 05 18 47 19 25 19 52 04 38 16 03 04 57 05 23 06 01 08 30 12 39 17 37 9.1 8.8 96 2307-0859 >90 SAT APR 06 18 48 19 26 19 52 05 18 17 05 04 56 05 22 06 00 08 34 12 43 17 40 9.1 9.1 100 2400-0200 >90 SUN APR 07 18 48 19 26 19 52 05 58 18 08 04 55 05 21 06 00 08 38 12 47 17 43 9.0 9.0 100 0052 0505 >90 MON APR 08 18 48 19 26 19 53 06 39 19 11 04 54 05 20 05 59 08 43 12 51 17 45 9.0 9.0 100 0146 1151 >90 TUE APR 09 18 48 19 27 19 53 20 15 04 53 05 20 05 58 08 47 12 55 17 48 9.0 8.6 95 0241 1751 >90 WED APR 10 18 49 19 27 19 53 21 21 04 52 05 19 05 57 08 51 12 59 17 51 9.0 7.5 83 0338 2243 >90 THU APR 11 18 49 19 27 19 54 22 26 04 51 05 18 05 56 08 56 13 02 17 54 9.0 6.4 71 0437 2608 >90 FRI APR 12 18 49 19 28 19 54 23 29 04 50 05 17 05 55 09 00 13 06 17 57 8.9 5.3 59 0537 2755 >90 SAT APR 13 18 50 19 28 19 55 00 26 04 50 05 16 05 55 09 05 13 10 18 01 8.9 4.4 49 0637 2756 88 SUN APR 14 18 50 19 29 19 55 01 18 04 49 05 15 05 54 09 09 13 14 18 04 8.9 3.5 39 0733 2638 77 MON APR 15 18 50 19 29 19 56 02 03 04 48 05 14 05 53 09 14 13 18 18 07 8.9 2.8 31 0826 2358 67 TUE APR 16 18 51 19 29 19 56 02 42 04 47 05 14 05 52 09 18 13 22 18 10 8.9 2.1 23 0916 2014 57 WED APR 17 18 51 19 30 19 56 03 18 04 46 05 13 05 51 09 21 13 26 18 13 8.8 1.5 16 1003 1542 48 THU APR 18 18 51 19 30 19 57 14 35 03 50 04 45 05 12 05 51 09 26 13 30 18 16 8.8 0.9 10 1048 1035 40 FRI APR 19 18 52 19 30 19 57 15 24 04 21 04 44 05 11 05 50 09 30 13 34 18 19 8.8 0.4 4 1131 0505 33 SAT APR 20 18 52 19 31 19 58 16 12 04 51 04 43 05 10 05 49 09 35 13 38 18 22 8.7 0.0 0 1213-0039 29 SUN APR 21 18 52 19 31 19 58 16 59 05 22 04 42 05 09 05 49 09 39 13 42 18 25 8.7 0.0 0 1256-0624 29 MON APR 22 18 53 19 32 19 59 17 48 05 55 04 42 05 09 05 48 09 44 13 46 18 29 8.7 0.0 0 1340-1201 32 TUE APR 23 18 53 19 32 19 59 18 39 06 30 04 41 05 08 05 47 09 48 13 50 18 32 8.7 0.0 0 1426-1715 38 WED APR 24 18 53 19 32 20 00 19 32 04 40 05 07 05 46 09 53 13 54 18 34 8.7 0.0 0 1515-2151 46 THU APR 25 18 54 19 33 20 00 20 28 04 39 05 06 05 46 09 57 13 58 18 37 8.7 0.5 5 1609-2532 55 FRI APR 26 18 54 19 33 20 01 21 26 04 38 05 06 05 45 10 02 14 02 18 40 8.6 1.4 16 1705-2801 65 SAT APR 27 18 54 19 34 20 01 22 26 04 37 05 05 05 44 10 06 14 06 18 43 8.6 2.4 28 1804-2858 75 SUN APR 28 18 55 19 34 20 02 23 23 04 37 05 04 05 44 10 11 14 10 18 47 8.6 3.4 39 1904-2817 86 MON APR 29 18 55 19 35 20 02 00 17 04 36 05 03 05 43 10 15 14 13 18 50 8.6 4.3 49 2004-2607 >90 TUE APR 30 18 55 19 35 20 03 01 06 04 35 05 03 05 42 10 20 14 17 18 53 8.5 5.1 59 2102-2220 >90 ONE LINE REFERS TO EVENING DATE LAST QUARTER Apr 02 03:16 UT AND FOLLOWING MORNING. NEW MOON Apr 08 18:20 UT All dates and times are zone HST FIRST QUARTER Apr 15 19:13 UT in upper table (except sid time). FULL MOON Apr 23 23:51 UT