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 THU JUN 01 19 08 19 50 20 20 16 45 04 34 04 19 04 49 05 31 12 40 16 21 20 40 8.0 0.0 0 1504-1925 44 FRI JUN 02 19 08 19 51 20 20 17 46 05 22 04 19 04 49 05 31 12 44 16 25 20 44 8.0 0.0 0 1601-2354 44 SAT JUN 03 19 09 19 51 20 21 18 50 06 18 04 19 04 49 05 31 12 49 16 28 20 48 8.0 0.0 0 1703-2703 48 SUN JUN 04 19 09 19 51 20 21 19 56 04 19 04 49 05 31 12 53 16 32 20 52 8.0 0.0 0 1808-2830 54 MON JUN 05 19 10 19 52 20 22 21 01 04 19 04 49 05 31 12 58 16 36 20 56 7.9 0.6 8 1915-2758 61 TUE JUN 06 19 10 19 52 20 22 22 00 04 19 04 49 05 31 13 02 16 40 21 00 7.9 1.6 20 2020-2532 70 WED JUN 07 19 10 19 53 20 23 22 53 04 19 04 49 05 31 13 07 16 44 21 04 7.9 2.5 31 2121-2124 79 THU JUN 08 19 11 19 53 20 23 23 39 04 19 04 49 05 31 13 11 16 48 21 08 7.9 3.3 41 2217-1602 89 FRI JUN 09 19 11 19 53 20 23 00 21 04 19 04 49 05 31 13 15 16 52 21 12 7.9 4.0 50 2311-1009 >90 SAT JUN 10 19 11 19 54 20 24 00 58 04 19 04 49 05 31 13 19 16 56 21 16 7.9 4.6 57 2401-0347 >90 SUN JUN 11 19 12 19 54 20 24 01 35 04 19 04 49 05 31 13 23 17 00 21 20 7.9 5.2 65 0049 0236 >90 MON JUN 12 19 12 19 55 20 25 02 11 14 32 04 19 04 49 05 31 13 28 17 04 21 24 7.9 5.8 72 0138 0843 >90 TUE JUN 13 19 12 19 55 20 25 02 48 15 28 04 19 04 49 05 31 13 32 17 08 21 28 7.9 6.4 80 0226 1419 >90 WED JUN 14 19 13 19 55 20 25 03 29 16 25 04 19 04 49 05 31 13 36 17 12 21 32 7.9 7.1 89 0317 1909 >90 THU JUN 15 19 13 19 56 20 26 04 12 17 23 04 19 04 49 05 32 13 41 17 16 21 35 7.9 7.8 98 0409 2300 >90 FRI JUN 16 19 13 19 56 20 26 05 00 18 21 04 19 04 49 05 32 13 45 17 20 21 39 7.9 7.9 100 0502 2540 >90 SAT JUN 17 19 13 19 56 20 26 05 51 19 18 04 19 04 49 05 32 13 49 17 24 21 43 7.9 7.9 100 0557 2700 >90 SUN JUN 18 19 14 19 56 20 27 06 45 20 12 04 19 04 49 05 32 13 54 17 28 21 47 7.9 7.9 100 0652 2659 >90 MON JUN 19 19 14 19 57 20 27 21 02 04 19 04 50 05 32 13 58 17 32 21 51 7.9 7.3 92 0745 2539 >90 TUE JUN 20 19 14 19 57 20 27 21 46 04 20 04 50 05 32 14 02 17 35 21 56 7.9 6.6 83 0836 2309 >90 WED JUN 21 19 14 19 57 20 27 22 26 04 20 04 50 05 33 14 06 17 39 22 00 7.9 5.9 74 0924 1939 >90 THU JUN 22 19 15 19 57 20 28 23 02 04 20 04 50 05 33 14 11 17 43 22 04 7.9 5.3 67 1010 1523 >90 FRI JUN 23 19 15 19 58 20 28 23 36 04 20 04 50 05 33 14 15 17 47 22 08 7.9 4.7 60 1054 1030 >90 SAT JUN 24 19 15 19 58 20 28 00 07 04 21 04 51 05 33 14 19 17 51 22 13 7.9 4.2 53 1142 0448 >90 SUN JUN 25 19 15 19 58 20 28 00 39 04 21 04 51 05 34 14 23 17 55 22 17 7.9 3.7 46 1221-0025 84 MON JUN 26 19 15 19 58 20 28 01 11 04 21 04 51 05 34 14 27 17 59 22 21 7.9 3.2 40 1305-0612 77 TUE JUN 27 19 16 19 58 20 28 01 46 04 21 04 52 05 34 14 30 18 03 22 25 7.9 2.6 32 1351-1159 70 WED JUN 28 19 16 19 58 20 28 14 30 02 25 04 22 04 52 05 34 14 34 18 07 22 30 7.9 2.0 24 1441-1724 63 THU JUN 29 19 16 19 58 20 28 15 28 03 09 04 22 04 52 05 35 14 38 18 11 22 34 7.9 1.2 15 1535-2213 57 FRI JUN 30 19 16 19 58 20 29 16 30 04 01 04 22 04 53 05 35 14 43 18 15 22 38 7.9 0.3 4 1635-2557 52 ONE LINE REFERS TO EVENING DATE FULL MOON Jun 04 03:41 UT AND FOLLOWING MORNING. LAST QUARTER Jun 10 19:31 UT All dates and times are zone HST NEW MOON Jun 18 04:34 UT in upper table (except sid time). FIRST QUARTER Jun 26 07:48 UT