KECK OBSERVATORY CALENDAR FOR 2021 -NAUTICAL (computed for altitude 4160.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) Zenith 2021 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 12 12 h h % h m d m deg MON MAR 01 18 37 19 15 19 40 21 04 05 28 05 54 06 32 05 34 10 20 16 15 10.7 1.8 17 1336-0551 55 TUE MAR 02 18 37 19 15 19 41 22 05 05 28 05 53 06 31 05 38 10 24 16 18 10.6 2.8 26 1430-1143 68 WED MAR 03 18 38 19 15 19 41 23 07 05 27 05 52 06 30 05 42 10 28 16 21 10.6 3.9 36 1525-1648 82 THU MAR 04 18 38 19 16 19 41 00 09 05 26 05 52 06 29 05 47 10 32 16 25 10.6 4.9 46 1624-2058 >90 FRI MAR 05 18 38 19 16 19 41 01 12 05 25 05 51 06 28 05 51 10 36 16 27 10.6 5.9 56 1723-2347 >90 SAT MAR 06 18 39 19 16 19 42 02 13 05 25 05 50 06 28 05 55 10 39 16 30 10.6 7.0 65 1823-2508 >90 SUN MAR 07 18 39 19 17 19 42 03 11 05 24 05 49 06 27 06 00 10 43 16 33 10.5 7.9 75 1922-2458 >90 MON MAR 08 18 39 19 17 19 42 04 04 14 42 05 23 05 49 06 26 06 04 10 47 16 37 10.5 8.8 83 2020-2324 >90 TUE MAR 09 18 40 19 17 19 43 04 51 15 41 05 22 05 48 06 25 06 08 10 51 16 40 10.5 9.6 90 2115-2037 >90 WED MAR 10 18 40 19 17 19 43 05 34 16 38 05 21 05 47 06 24 06 11 10 55 16 43 10.5 10.3 97 2206-1653 >90 THU MAR 11 18 40 19 18 19 43 06 13 17 33 05 21 05 46 06 24 06 16 10 59 16 46 10.5 10.5 100 2255-1227 >90 FRI MAR 12 18 40 19 18 19 44 06 49 18 26 05 20 05 45 06 23 06 20 11 03 16 49 10.5 10.5 100 2341-0734 >90 SAT MAR 13 18 41 19 18 19 44 19 16 05 19 05 44 06 22 06 24 11 07 16 52 10.4 10.4 100 0026-0229 >90 SUN MAR 14 18 41 19 19 19 44 20 06 05 18 05 44 06 21 06 29 11 11 16 56 10.4 9.6 92 0109 0238 >90 MON MAR 15 18 41 19 19 19 44 20 55 05 17 05 43 06 20 06 33 11 15 16 59 10.4 8.8 84 0153 0736 >90 TUE MAR 16 18 42 19 19 19 45 21 44 05 16 05 42 06 19 06 37 11 19 17 02 10.4 8.0 76 0237 1215 >90 WED MAR 17 18 42 19 19 19 45 22 34 05 15 05 41 06 19 06 41 11 23 17 05 10.4 7.1 68 0322 1626 >90 THU MAR 18 18 42 19 20 19 45 23 26 05 15 05 40 06 18 06 46 11 27 17 08 10.3 6.2 60 0409 1959 >90 FRI MAR 19 18 42 19 20 19 46 00 18 05 14 05 39 06 17 06 50 11 31 17 11 10.3 5.4 51 0501 2234 89 SAT MAR 20 18 43 19 20 19 46 01 12 05 13 05 38 06 16 06 54 11 35 17 14 10.3 4.4 43 0551 2428 78 SUN MAR 21 18 43 19 21 19 46 02 04 05 12 05 38 06 15 06 59 11 39 17 18 10.3 3.6 34 0645 2507 67 MON MAR 22 18 43 19 21 19 47 02 56 05 11 05 37 06 14 07 03 11 43 17 20 10.3 2.7 26 0741 2429 56 TUE MAR 23 18 44 19 21 19 47 03 45 05 10 05 36 06 13 07 07 11 46 17 23 10.2 1.8 18 0837 2229 44 WED MAR 24 18 44 19 21 19 47 14 44 04 32 05 09 05 35 06 12 07 11 11 50 17 26 10.2 1.1 10 0934 1910 32 THU MAR 25 18 44 19 22 19 47 15 44 05 17 05 08 05 34 06 12 07 16 11 54 17 29 10.2 0.3 2 1029 1438 21 FRI MAR 26 18 44 19 22 19 48 16 45 05 59 05 07 05 33 06 11 07 20 11 58 17 32 10.2 0.0 0 1124 0907 14 SAT MAR 27 18 45 19 22 19 48 17 46 06 41 05 06 05 32 06 10 07 23 12 02 17 35 10.2 0.0 0 1218 0256 17 SUN MAR 28 18 45 19 23 19 48 18 48 05 05 05 31 06 09 07 28 12 06 17 38 10.1 0.0 0 1313-0331 29 MON MAR 29 18 45 19 23 19 49 19 50 05 05 05 30 06 08 07 32 12 10 17 41 10.1 0.5 4 1409-0950 42 TUE MAR 30 18 45 19 23 19 49 20 54 05 04 05 29 06 07 07 36 12 14 17 44 10.1 1.5 15 1506-1533 55 WED MAR 31 18 46 19 24 19 49 21 59 05 03 05 29 06 06 07 41 12 18 17 48 10.1 2.6 25 1605-2015 69 ONE LINE REFERS TO EVENING DATE LAST QUARTER Mar 06 01:31 UT AND FOLLOWING MORNING. NEW MOON Mar 13 10:20 UT All dates and times are zone HST FIRST QUARTER Mar 21 14:40 UT in upper table (except sid time). FULL MOON Mar 28 18:47 UT