KECK OBSERVATORY CALENDAR FOR 2027 -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 2027 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 WED DEC 01 17 52 18 32 18 59 21 14 05 23 05 50 06 30 23 20 04 22 09 46 10.4 8.1 78 2001-2056 >90 THU DEC 02 17 53 18 33 19 00 22 06 05 23 05 50 06 30 23 25 04 26 09 50 10.4 7.3 70 2048-1709 >90 FRI DEC 03 17 53 18 33 19 00 22 56 05 24 05 51 06 31 23 29 04 30 09 55 10.4 6.5 62 2133-1243 >90 SAT DEC 04 17 53 18 33 19 00 23 45 05 24 05 51 06 32 23 33 04 34 09 59 10.4 5.7 54 2217-0748 >90 SUN DEC 05 17 53 18 33 19 00 00 33 05 25 05 52 06 32 23 37 04 38 10 04 10.4 4.9 46 2301-0231 86 MON DEC 06 17 53 18 34 19 01 01 21 05 25 05 52 06 33 23 42 04 42 10 08 10.4 4.1 39 2343 0248 75 TUE DEC 07 17 53 18 34 19 01 02 12 05 26 05 53 06 33 23 46 04 46 10 13 10.4 3.2 31 0028 0815 63 WED DEC 08 17 54 18 34 19 01 03 05 05 27 05 54 06 34 23 50 04 50 10 18 10.4 2.4 22 0115 1331 52 THU DEC 09 17 54 18 34 19 01 14 21 04 02 05 27 05 54 06 35 23 54 04 54 10 22 10.4 1.4 13 0206 1821 40 FRI DEC 10 17 54 18 35 19 02 15 04 05 02 05 28 05 55 06 35 23 59 04 58 10 27 10.4 0.4 4 0301 2224 27 SAT DEC 11 17 55 18 35 19 02 15 53 06 06 05 28 05 55 06 36 00 03 05 02 10 31 10.4 0.0 0 0401 2518 15 SUN DEC 12 17 55 18 35 19 03 16 50 05 29 05 56 06 36 00 08 05 06 10 35 10.4 0.0 0 0505 2639 07 MON DEC 13 17 55 18 36 19 03 17 53 05 29 05 56 06 37 00 12 05 09 10 39 10.4 0.0 0 0611 2610 15 TUE DEC 14 17 56 18 36 19 03 18 59 05 30 05 57 06 38 00 16 05 13 10 44 10.5 0.0 0 0715 2351 29 WED DEC 15 17 56 18 37 19 04 20 06 05 30 05 58 06 38 00 21 05 17 10 48 10.4 1.0 9 0817 1954 42 THU DEC 16 17 56 18 37 19 04 21 12 05 31 05 58 06 39 00 25 05 21 10 53 10.4 2.1 20 0915 1444 56 FRI DEC 17 17 57 18 37 19 05 22 14 05 32 05 59 06 39 00 29 05 25 10 58 10.4 3.1 30 1010 0848 69 SAT DEC 18 17 57 18 38 19 05 23 13 05 32 05 59 06 40 00 33 05 29 11 02 10.4 4.1 39 1101 0229 83 SUN DEC 19 17 58 18 38 19 05 00 11 05 33 06 00 06 40 00 37 05 33 11 07 10.5 5.1 48 1152-0345 >90 MON DEC 20 17 58 18 39 19 06 01 08 05 33 06 00 06 41 00 42 05 37 11 11 10.4 6.0 57 1242-0942 >90 TUE DEC 21 17 59 18 39 19 06 02 05 05 34 06 01 06 41 00 46 05 41 11 16 10.5 7.0 66 1332-1505 >90 WED DEC 22 17 59 18 40 19 07 03 02 05 34 06 01 06 42 00 51 05 45 11 20 10.4 7.9 75 1424-1938 >90 THU DEC 23 18 00 18 40 19 07 04 00 14 43 05 35 06 02 06 42 00 55 05 49 11 25 10.5 8.9 84 1517-2309 >90 FRI DEC 24 18 00 18 41 19 08 04 58 15 31 05 35 06 02 06 43 01 00 05 53 11 29 10.5 9.8 94 1612-2527 >90 SAT DEC 25 18 01 18 41 19 08 05 53 16 23 05 36 06 03 06 43 01 04 05 57 11 34 10.5 10.5 100 1708-2627 >90 SUN DEC 26 18 01 18 42 19 09 06 45 17 17 05 36 06 03 06 44 01 09 06 01 11 38 10.5 10.5 100 1803-2606 >90 MON DEC 27 18 02 18 42 19 10 18 11 05 36 06 04 06 44 01 14 06 05 11 42 10.4 10.4 100 1856-2430 >90 TUE DEC 28 18 02 18 43 19 10 19 06 05 37 06 04 06 44 01 18 06 09 11 47 10.5 10.5 100 1947-2148 >90 WED DEC 29 18 03 18 44 19 11 19 59 05 37 06 04 06 45 01 23 06 13 11 50 10.4 9.6 92 2035-1813 >90 THU DEC 30 18 04 18 44 19 11 20 49 05 38 06 05 06 45 01 27 06 17 11 55 10.5 8.8 84 2120-1357 >90 FRI DEC 31 18 04 18 45 19 12 21 38 05 38 06 05 06 46 01 32 06 20 11 59 10.4 8.0 76 2204-0911 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Dec 06 05:23 UT AND FOLLOWING MORNING. FULL MOON Dec 13 16:09 UT All dates and times are zone HST LAST QUARTER Dec 20 09:12 UT in upper table (except sid time). NEW MOON Dec 27 20:11 UT