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 MON MAY 01 18 55 19 35 20 03 15 23 04 11 04 35 05 03 05 42 10 21 14 18 18 54 8.5 0.4 4 1210 0129 36 TUE MAY 02 18 56 19 36 20 03 16 14 04 44 04 34 05 02 05 42 10 25 14 22 18 57 8.5 0.0 0 1255-0431 32 WED MAY 03 18 56 19 36 20 04 17 06 05 19 04 34 05 01 05 41 10 30 14 26 19 01 8.5 0.0 0 1342-1031 32 THU MAY 04 18 56 19 36 20 04 18 02 05 59 04 33 05 01 05 41 10 34 14 30 19 04 8.5 0.0 0 1432-1612 36 FRI MAY 05 18 57 19 37 20 05 19 00 06 43 04 32 05 00 05 40 10 38 14 34 19 07 8.4 0.0 0 1526-2114 43 SAT MAY 06 18 57 19 37 20 05 20 02 04 31 04 59 05 40 10 42 14 38 19 10 8.4 0.0 0 1625-2512 52 SUN MAY 07 18 58 19 38 20 06 21 06 04 31 04 59 05 39 10 47 14 42 19 14 8.4 1.0 11 1727-2743 62 MON MAY 08 18 58 19 38 20 06 22 10 04 30 04 58 05 39 10 51 14 46 19 17 8.4 2.1 24 1831-2829 73 TUE MAY 09 18 58 19 39 20 07 23 11 04 29 04 58 05 38 10 56 14 50 19 20 8.4 3.1 36 1935-2717 84 WED MAY 10 18 59 19 39 20 08 00 07 04 29 04 57 05 38 11 01 14 54 19 24 8.3 4.0 47 2038-2430 >90 THU MAY 11 18 59 19 40 20 08 00 56 04 28 04 57 05 37 11 05 14 58 19 26 8.3 4.8 57 2136-2012 >90 FRI MAY 12 19 00 19 40 20 09 01 40 04 28 04 56 05 37 11 10 15 02 19 30 8.3 5.5 66 2231-1451 >90 SAT MAY 13 19 00 19 41 20 09 02 20 04 27 04 55 05 36 11 14 15 06 19 33 8.3 6.2 74 2322-0849 >90 SUN MAY 14 19 00 19 41 20 10 02 57 14 44 04 26 04 55 05 36 11 19 15 10 19 36 8.3 6.8 82 0011-0226 >90 MON MAY 15 19 01 19 42 20 10 03 34 15 41 04 26 04 55 05 35 11 23 15 14 19 40 8.3 7.4 89 0100 0357 >90 TUE MAY 16 19 01 19 42 20 11 04 11 16 37 04 25 04 54 05 35 11 28 15 17 19 43 8.2 8.0 97 0148 1003 >90 WED MAY 17 19 02 19 43 20 12 04 50 17 35 04 25 04 54 05 35 11 33 15 21 19 47 8.2 8.2 100 0238 1535 >90 THU MAY 18 19 02 19 43 20 12 05 32 18 33 04 24 04 53 05 34 11 37 15 25 19 50 8.2 8.2 100 0329 2018 >90 FRI MAY 19 19 03 19 44 20 13 06 17 19 32 04 24 04 53 05 34 11 42 15 29 19 54 8.2 8.2 100 0423 2356 >90 SAT MAY 20 19 03 19 44 20 13 20 31 04 23 04 52 05 34 11 46 15 33 19 57 8.2 7.9 96 0517 2618 >90 SUN MAY 21 19 03 19 45 20 14 21 27 04 23 04 52 05 33 11 51 15 37 20 01 8.1 6.9 85 0613 2717 >90 MON MAY 22 19 04 19 45 20 14 22 20 04 23 04 52 05 33 11 55 15 41 20 05 8.1 6.0 74 0707 2654 >90 TUE MAY 23 19 04 19 46 20 15 23 08 04 22 04 51 05 33 11 59 15 45 20 08 8.1 5.2 64 0800 2514 >90 WED MAY 24 19 05 19 46 20 15 23 50 04 22 04 51 05 33 12 03 15 49 20 12 8.1 4.5 55 0851 2226 >90 THU MAY 25 19 05 19 47 20 16 00 29 04 21 04 51 05 32 12 08 15 53 20 15 8.1 3.9 47 0940 1836 87 FRI MAY 26 19 06 19 47 20 17 01 04 04 21 04 50 05 32 12 13 15 57 20 19 8.1 3.3 40 1025 1409 79 SAT MAY 27 19 06 19 48 20 17 01 37 04 21 04 50 05 32 12 17 16 01 20 23 8.1 2.7 33 1109 0903 71 SUN MAY 28 19 06 19 48 20 18 02 09 04 20 04 50 05 32 12 22 16 05 20 26 8.0 2.2 27 1153 0330 64 MON MAY 29 19 07 19 49 20 18 14 04 02 41 04 20 04 50 05 32 12 26 16 09 20 29 8.0 1.7 20 1237-0220 57 TUE MAY 30 19 07 19 49 20 19 14 55 03 15 04 20 04 49 05 31 12 31 16 13 20 33 8.0 1.1 13 1323-0817 50 WED MAY 31 19 08 19 50 20 19 15 48 03 52 04 20 04 49 05 31 12 35 16 17 20 37 8.0 0.5 5 1411-1404 46 ONE LINE REFERS TO EVENING DATE FULL MOON May 05 17:34 UT AND FOLLOWING MORNING. LAST QUARTER May 12 14:28 UT All dates and times are zone HST NEW MOON May 19 15:53 UT in upper table (except sid time). FIRST QUARTER May 27 15:21 UT