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 SAT JUL 01 19 16 19 58 20 29 17 36 05 01 04 23 04 53 05 35 14 47 18 19 22 43 7.9 0.0 0 1739-2809 49 SUN JUL 02 19 16 19 59 20 29 18 43 06 07 04 23 04 53 05 36 14 51 18 23 22 47 7.9 0.0 0 1847-2827 49 MON JUL 03 19 16 19 59 20 29 19 46 04 24 04 54 05 36 14 55 18 27 22 51 7.9 0.0 0 1954-2640 51 TUE JUL 04 19 16 19 59 20 29 20 43 04 24 04 54 05 36 14 59 18 31 22 55 7.9 0.2 2 2059-2301 56 WED JUL 05 19 16 19 59 20 28 21 33 04 24 04 54 05 37 15 02 18 35 22 59 7.9 1.1 13 2200-1754 63 THU JUL 06 19 16 19 58 20 28 22 18 04 25 04 55 05 37 15 06 18 39 23 04 7.9 1.8 23 2255-1150 71 FRI JUL 07 19 16 19 58 20 28 22 58 04 25 04 55 05 37 15 10 18 42 23 08 7.9 2.5 31 2348-0515 79 SAT JUL 08 19 16 19 58 20 28 23 36 04 26 04 56 05 38 15 14 18 46 23 13 8.0 3.1 39 0037 0113 88 SUN JUL 09 19 16 19 58 20 28 00 12 04 26 04 56 05 38 15 18 18 50 23 17 8.0 3.7 46 0127 0737 >90 MON JUL 10 19 16 19 58 20 28 00 49 04 27 04 56 05 39 15 22 18 54 23 22 8.0 4.3 54 0216 1323 >90 TUE JUL 11 19 16 19 58 20 28 01 28 14 20 04 27 04 57 05 39 15 26 18 58 23 26 8.0 5.0 62 0306 1823 >90 WED JUL 12 19 16 19 58 20 27 02 10 15 17 04 28 04 57 05 39 15 29 19 02 23 31 8.0 5.7 71 0357 2224 >90 THU JUL 13 19 16 19 58 20 27 02 57 16 15 04 28 04 58 05 40 15 33 19 06 23 35 8.0 6.5 81 0451 2517 >90 FRI JUL 14 19 15 19 57 20 27 03 46 17 12 04 29 04 58 05 40 15 37 19 10 23 40 8.0 7.3 91 0545 2652 >90 SAT JUL 15 19 15 19 57 20 27 04 39 18 07 04 29 04 59 05 40 15 40 19 14 23 44 8.0 8.0 100 0639 2706 >90 SUN JUL 16 19 15 19 57 20 26 05 34 18 57 04 30 04 59 05 41 15 43 19 18 23 49 8.1 8.1 100 0732 2603 >90 MON JUL 17 19 15 19 57 20 26 06 28 19 44 04 30 05 00 05 41 15 47 19 22 23 53 8.1 8.1 100 0824 2347 >90 TUE JUL 18 19 15 19 56 20 26 20 25 04 31 05 00 05 42 15 51 19 26 23 58 8.1 8.1 100 0912 2030 >90 WED JUL 19 19 14 19 56 20 25 21 02 04 31 05 00 05 42 15 54 19 30 00 02 8.1 7.5 92 0959 1624 >90 THU JUL 20 19 14 19 56 20 25 21 36 04 32 05 01 05 42 15 58 19 34 00 06 8.1 6.9 85 1043 1139 >90 FRI JUL 21 19 14 19 55 20 24 22 08 04 32 05 01 05 43 16 01 19 38 00 10 8.1 6.4 78 1126 0628 >90 SAT JUL 22 19 14 19 55 20 24 22 39 04 33 05 02 05 43 16 05 19 42 00 15 8.2 5.9 72 1208 0058 >90 SUN JUL 23 19 13 19 55 20 24 23 10 04 33 05 02 05 44 16 09 19 46 00 19 8.2 5.4 66 1250-0440 >90 MON JUL 24 19 13 19 54 20 23 23 43 04 34 05 03 05 44 16 12 19 50 00 24 8.2 4.8 59 1335-1016 >90 TUE JUL 25 19 13 19 54 20 23 00 19 04 34 05 03 05 44 16 16 19 53 00 28 8.2 4.2 51 1423-1531 89 WED JUL 26 19 12 19 53 20 22 01 00 04 35 05 04 05 45 16 19 19 57 00 33 8.2 3.6 43 1513-2031 81 THU JUL 27 19 12 19 53 20 21 14 13 01 47 04 35 05 04 05 45 16 22 20 01 00 37 8.2 2.8 34 1609-2440 72 FRI JUL 28 19 11 19 52 20 21 15 16 02 42 04 36 05 05 05 46 16 26 20 05 00 42 8.2 1.9 23 1710-2729 64 SAT JUL 29 19 11 19 52 20 20 16 21 03 44 04 37 05 05 05 46 16 29 20 09 00 47 8.3 0.9 10 1815-2837 56 SUN JUL 30 19 10 19 51 20 20 17 26 04 52 04 37 05 06 05 46 16 33 20 13 00 51 8.3 0.0 0 1923-2744 49 MON JUL 31 19 10 19 51 20 19 18 26 06 02 04 38 05 06 05 47 16 36 20 17 00 56 8.3 0.0 0 2030-2450 45 ONE LINE REFERS TO EVENING DATE FULL MOON Jul 03 11:37 UT AND FOLLOWING MORNING. LAST QUARTER Jul 10 01:47 UT All dates and times are zone HST NEW MOON Jul 17 18:28 UT in upper table (except sid time). FIRST QUARTER Jul 25 22:06 UT