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 FEB 01 18 24 19 03 19 29 22 14 05 42 06 08 06 47 03 32 08 29 14 38 11.1 3.2 28 1259-0120 69 TUE FEB 02 18 25 19 04 19 30 23 13 05 41 06 08 06 46 03 36 08 33 14 42 11.1 4.1 37 1351-0711 83 WED FEB 03 18 25 19 04 19 30 00 12 05 41 06 07 06 46 03 40 08 37 14 45 11.0 5.1 46 1444-1243 >90 THU FEB 04 18 26 19 05 19 31 01 13 05 41 06 07 06 46 03 45 08 41 14 49 11.0 6.1 55 1539-1731 >90 FRI FEB 05 18 26 19 05 19 31 02 15 05 41 06 07 06 45 03 49 08 45 14 53 11.0 7.2 64 1636-2119 >90 SAT FEB 06 18 27 19 06 19 32 03 18 05 40 06 06 06 45 03 54 08 49 14 56 11.0 8.2 74 1735-2350 >90 SUN FEB 07 18 27 19 06 19 32 04 18 14 51 05 40 06 06 06 45 03 58 08 53 15 00 11.0 9.2 83 1836-2453 >90 MON FEB 08 18 28 19 07 19 32 05 16 15 50 05 40 06 06 06 44 04 03 08 57 15 04 11.0 10.2 92 1935-2427 >90 TUE FEB 09 18 28 19 07 19 33 06 08 16 50 05 39 06 05 06 44 04 07 09 01 15 07 11.0 11.0 100 2033-2235 >90 WED FEB 10 18 29 19 07 19 33 06 55 17 50 05 39 06 05 06 43 04 11 09 05 15 11 11.0 11.0 100 2128-1932 >90 THU FEB 11 18 29 19 08 19 34 18 47 05 39 06 04 06 43 04 16 09 09 15 14 10.9 10.9 100 2220-1534 >90 FRI FEB 12 18 30 19 08 19 34 19 42 05 38 06 04 06 42 04 20 09 13 15 18 10.9 10.4 94 2308-1059 >90 SAT FEB 13 18 30 19 09 19 35 20 34 05 38 06 04 06 42 04 25 09 17 15 22 10.9 9.5 87 2354-0601 >90 SUN FEB 14 18 31 19 09 19 35 21 24 05 37 06 03 06 41 04 29 09 21 15 25 10.9 8.7 79 0039-0055 >90 MON FEB 15 18 31 19 10 19 35 22 13 05 37 06 03 06 41 04 34 09 25 15 29 10.9 7.8 71 0122 0408 >90 TUE FEB 16 18 32 19 10 19 36 23 02 05 36 06 02 06 40 04 38 09 28 15 31 10.9 7.0 64 0206 0900 >90 WED FEB 17 18 32 19 10 19 36 23 51 05 36 06 01 06 40 04 42 09 32 15 34 10.9 6.2 56 0251 1331 >90 THU FEB 18 18 33 19 11 19 36 00 42 05 35 06 01 06 39 04 47 09 36 15 38 10.8 5.3 49 0337 1728 84 FRI FEB 19 18 33 19 11 19 37 01 34 05 35 06 00 06 38 04 51 09 40 15 41 10.8 4.4 40 0426 2050 73 SAT FEB 20 18 33 19 11 19 37 02 28 05 34 06 00 06 38 04 54 09 44 15 45 10.8 3.5 32 0517 2320 62 SUN FEB 21 18 34 19 12 19 38 03 22 05 34 05 59 06 37 04 59 09 48 15 48 10.8 2.6 24 0611 2445 50 MON FEB 22 18 34 19 12 19 38 14 06 04 15 05 33 05 59 06 36 05 03 09 52 15 52 10.8 1.7 16 0707 2456 38 TUE FEB 23 18 35 19 13 19 38 15 02 05 07 05 32 05 58 06 36 05 08 09 56 15 55 10.7 0.8 7 0804 2345 26 WED FEB 24 18 35 19 13 19 39 16 01 05 57 05 32 05 57 06 35 05 12 10 00 15 58 10.7 0.0 0 0902 2110 14 THU FEB 25 18 35 19 13 19 39 17 02 06 43 05 31 05 57 06 34 05 16 10 04 16 02 10.7 0.0 0 0959 1716 03 FRI FEB 26 18 36 19 14 19 39 18 03 05 30 05 56 06 34 05 21 10 08 16 05 10.7 0.0 0 1054 1218 13 SAT FEB 27 18 36 19 14 19 40 19 04 05 30 05 55 06 33 05 25 10 12 16 08 10.7 0.0 0 1149 0632 27 SUN FEB 28 18 37 19 14 19 40 20 04 05 29 05 55 06 32 05 29 10 16 16 12 10.7 0.8 7 1242 0022 41 ONE LINE REFERS TO EVENING DATE LAST QUARTER Feb 04 17:37 UT AND FOLLOWING MORNING. NEW MOON Feb 11 19:05 UT All dates and times are zone HST FIRST QUARTER Feb 19 18:47 UT in upper table (except sid time). FULL MOON Feb 27 08:16 UT