KECK OBSERVATORY CALENDAR FOR 2025 -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 2025 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 TUE JUL 01 19 16 19 58 20 29 00 04 04 23 04 53 05 35 14 49 18 21 22 45 7.9 4.3 54 1223-0338 >90 WED JUL 02 19 16 19 59 20 29 00 36 04 23 04 53 05 36 14 53 18 25 22 49 7.9 3.8 47 1301-0938 85 THU JUL 03 19 16 19 59 20 29 01 09 04 24 04 54 05 36 14 57 18 29 22 53 7.9 3.3 41 1345-1454 78 FRI JUL 04 19 16 19 59 20 29 01 44 04 24 04 54 05 36 15 01 18 33 22 57 7.9 2.7 33 1430-1940 71 SAT JUL 05 19 16 19 59 20 28 14 50 02 24 04 24 04 54 05 37 15 04 18 37 23 01 7.9 2.0 25 1519-2340 65 SUN JUL 06 19 16 19 58 20 28 15 43 03 08 04 25 04 55 05 37 15 08 18 41 23 06 7.9 1.3 16 1610-2644 59 MON JUL 07 19 16 19 58 20 28 16 38 03 57 04 25 04 55 05 37 15 12 18 45 23 10 7.9 0.5 5 1705-2838 54 TUE JUL 08 19 16 19 58 20 28 17 33 04 51 04 26 04 56 05 38 15 16 18 48 23 15 8.0 0.0 0 1802-2908 50 WED JUL 09 19 16 19 58 20 28 18 27 05 48 04 26 04 56 05 38 15 20 18 52 23 19 8.0 0.0 0 1859-2809 48 THU JUL 10 19 16 19 58 20 28 19 17 06 47 04 27 04 56 05 39 15 24 18 56 23 24 8.0 0.0 0 1956-2539 48 FRI JUL 11 19 16 19 58 20 28 20 04 04 27 04 57 05 39 15 28 19 00 23 28 8.0 0.0 0 2051-2148 50 SAT JUL 12 19 16 19 58 20 27 20 46 04 28 04 57 05 39 15 31 19 04 23 33 8.0 0.3 3 2144-1649 54 SUN JUL 13 19 16 19 58 20 27 21 25 04 28 04 58 05 40 15 35 19 08 23 37 8.0 1.0 12 2235-1059 59 MON JUL 14 19 15 19 57 20 27 22 02 04 29 04 58 05 40 15 39 19 12 23 42 8.0 1.6 19 2324-0437 67 TUE JUL 15 19 15 19 57 20 27 22 38 04 29 04 59 05 40 15 42 19 16 23 46 8.0 2.2 27 0013 0200 75 WED JUL 16 19 15 19 57 20 26 23 15 04 30 04 59 05 41 15 45 19 20 23 51 8.1 2.8 34 0102 0832 83 THU JUL 17 19 15 19 57 20 26 23 55 04 30 05 00 05 41 15 49 19 24 23 55 8.1 3.5 43 0150 1414 >90 FRI JUL 18 19 15 19 56 20 26 00 39 04 31 05 00 05 42 15 53 19 28 00 00 8.1 4.2 52 0250 2005 >90 SAT JUL 19 19 14 19 56 20 25 01 28 14 38 04 31 05 00 05 42 15 56 19 32 00 04 8.1 5.1 62 0349 2417 >90 SUN JUL 20 19 14 19 56 20 25 02 24 15 44 04 32 05 01 05 42 16 00 19 36 00 09 8.1 6.0 73 0451 2657 >90 MON JUL 21 19 14 19 55 20 24 03 26 16 51 04 32 05 01 05 43 16 03 19 40 00 12 8.1 7.0 86 0555 2749 >90 TUE JUL 22 19 14 19 55 20 24 04 31 17 53 04 33 05 02 05 43 16 07 19 44 00 17 8.2 8.1 99 0658 2649 >90 WED JUL 23 19 13 19 55 20 24 05 36 18 49 04 33 05 02 05 44 16 11 19 48 00 21 8.2 8.2 100 0759 2407 >90 THU JUL 24 19 13 19 54 20 23 06 39 19 38 04 34 05 03 05 44 16 14 19 52 00 26 8.2 8.2 100 0855 2004 >90 FRI JUL 25 19 13 19 54 20 23 20 20 04 34 05 03 05 44 16 18 19 55 00 30 8.2 8.2 100 0947 1504 >90 SAT JUL 26 19 12 19 53 20 22 20 57 04 35 05 04 05 45 16 21 19 59 00 35 8.2 7.6 92 1034 0929 >90 SUN JUL 27 19 12 19 53 20 21 21 31 04 35 05 04 05 45 16 24 20 03 00 39 8.2 7.1 85 1120 0338 >90 MON JUL 28 19 11 19 52 20 21 22 03 04 36 05 05 05 46 16 28 20 07 00 44 8.2 6.6 79 1203-0215 >90 TUE JUL 29 19 11 19 52 20 20 22 34 04 37 05 05 05 46 16 31 20 11 00 49 8.3 6.0 73 1246-0758 >90 WED JUL 30 19 10 19 51 20 20 23 07 04 37 05 06 05 46 16 35 20 15 00 53 8.3 5.5 66 1329-1321 >90 THU JUL 31 19 10 19 51 20 19 23 42 04 38 05 06 05 47 16 38 20 19 00 58 8.3 4.9 59 1414-1814 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Jul 02 19:32 UT AND FOLLOWING MORNING. FULL MOON Jul 10 20:38 UT All dates and times are zone HST LAST QUARTER Jul 18 00:38 UT in upper table (except sid time). NEW MOON Jul 24 19:10 UT