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 SAT MAR 01 18 37 19 15 19 40 20 44 05 28 05 54 06 32 05 59 10 20 15 49 9.8 8.7 89 0050 0655 >90 SUN MAR 02 18 37 19 15 19 41 21 46 05 28 05 53 06 31 06 04 10 24 15 53 9.8 7.7 78 0143 1331 >90 MON MAR 03 18 38 19 15 19 41 22 50 05 27 05 52 06 30 06 08 10 28 15 56 9.8 6.6 67 0239 1920 >90 TUE MAR 04 18 38 19 16 19 41 23 56 05 26 05 52 06 29 06 12 10 32 15 59 9.8 5.5 56 0337 2358 >90 WED MAR 05 18 38 19 16 19 41 01 02 05 25 05 51 06 28 06 16 10 36 16 02 9.7 4.4 45 0438 2704 81 THU MAR 06 18 39 19 16 19 42 02 05 05 25 05 50 06 28 06 21 10 40 16 05 9.7 3.3 34 0540 2830 68 FRI MAR 07 18 39 19 17 19 42 03 03 05 24 05 49 06 27 06 25 10 44 16 08 9.7 2.4 24 0641 2809 56 SAT MAR 08 18 39 19 17 19 42 03 54 05 23 05 49 06 26 06 29 10 47 16 11 9.7 1.5 15 0740 2610 43 SUN MAR 09 18 40 19 17 19 43 14 39 04 39 05 22 05 48 06 25 06 34 10 51 16 14 9.6 0.7 7 0835 2248 32 MON MAR 10 18 40 19 17 19 43 15 36 05 18 05 21 05 47 06 24 06 38 10 55 16 17 9.6 0.0 0 0927 1822 21 TUE MAR 11 18 40 19 18 19 43 16 31 05 54 05 21 05 46 06 24 06 42 10 59 16 21 9.6 0.0 0 1015 1311 12 WED MAR 12 18 40 19 18 19 44 17 23 06 26 05 20 05 45 06 23 06 47 11 03 16 24 9.6 0.0 0 1101 0732 12 THU MAR 13 18 41 19 18 19 44 18 12 06 57 05 19 05 44 06 22 06 50 11 07 16 27 9.6 0.0 0 1144 0140 20 FRI MAR 14 18 41 19 19 19 44 19 01 05 18 05 44 06 21 06 54 11 11 16 30 9.6 0.0 0 1227-0413 30 SAT MAR 15 18 41 19 19 19 44 19 49 05 17 05 43 06 20 06 58 11 15 16 33 9.5 0.1 0 1310-0953 41 SUN MAR 16 18 42 19 19 19 45 20 38 05 16 05 42 06 19 07 03 11 19 16 36 9.5 0.9 9 1354-1510 52 MON MAR 17 18 42 19 19 19 45 21 28 05 15 05 41 06 19 07 07 11 23 16 39 9.5 1.7 18 1440-1953 63 TUE MAR 18 18 42 19 20 19 45 22 20 05 15 05 40 06 18 07 11 11 27 16 43 9.5 2.6 27 1529-2349 73 WED MAR 19 18 42 19 20 19 46 23 14 05 14 05 39 06 17 07 16 11 31 16 46 9.5 3.5 36 1620-2641 84 THU MAR 20 18 43 19 20 19 46 00 09 05 13 05 38 06 16 07 20 11 35 16 49 9.5 4.4 46 1714-2831 >90 FRI MAR 21 18 43 19 21 19 46 01 04 05 12 05 38 06 15 07 24 11 39 16 52 9.4 5.3 56 1810-2856 >90 SAT MAR 22 18 43 19 21 19 47 01 57 05 11 05 37 06 14 07 29 11 43 16 55 9.4 6.2 65 1907-2754 >90 SUN MAR 23 18 44 19 21 19 47 02 47 05 10 05 36 06 13 07 33 11 47 16 57 9.4 7.0 74 2003-2522 >90 MON MAR 24 18 44 19 21 19 47 03 34 14 19 05 09 05 35 06 12 07 37 11 51 17 00 9.4 7.8 83 2059-2125 >90 TUE MAR 25 18 44 19 22 19 47 04 17 15 20 05 08 05 34 06 12 07 41 11 54 17 03 9.4 8.5 90 2152-1613 >90 WED MAR 26 18 44 19 22 19 48 04 58 16 21 05 07 05 33 06 11 07 46 11 58 17 06 9.3 9.2 98 2245-1003 >90 THU MAR 27 18 45 19 22 19 48 05 38 17 22 05 06 05 32 06 10 07 50 12 02 17 09 9.3 9.3 100 2337-0313 >90 FRI MAR 28 18 45 19 23 19 48 06 17 18 24 05 05 05 31 06 09 07 54 12 06 17 12 9.3 9.3 100 0029 0353 >90 SAT MAR 29 18 45 19 23 19 49 06 59 19 27 05 05 05 30 06 08 07 59 12 10 17 16 9.3 9.3 100 0122 1050 >90 SUN MAR 30 18 45 19 23 19 49 20 33 05 04 05 29 06 07 08 03 12 14 17 19 9.2 8.5 92 0218 1709 >90 MON MAR 31 18 46 19 24 19 49 21 41 05 03 05 29 06 06 08 06 12 18 17 22 9.2 7.4 79 0317 2223 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Mar 06 16:32 UT AND FOLLOWING MORNING. FULL MOON Mar 14 06:55 UT All dates and times are zone HST LAST QUARTER Mar 22 11:31 UT in upper table (except sid time). NEW MOON Mar 29 10:56 UT