KECK OBSERVATORY CALENDAR FOR 2020 -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 2020 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 FEB 01 18 24 19 03 19 29 01 07 05 42 06 08 06 47 03 55 08 26 14 09 10.2 4.6 44 0259 1241 78 SUN FEB 02 18 25 19 04 19 30 02 00 05 41 06 08 06 46 04 00 08 30 14 12 10.2 3.7 36 0348 1634 67 MON FEB 03 18 25 19 04 19 30 02 55 05 41 06 07 06 46 04 04 08 34 14 16 10.2 2.8 27 0440 1948 55 TUE FEB 04 18 26 19 05 19 31 03 53 05 41 06 07 06 46 04 08 08 38 14 20 10.2 1.8 17 0535 2207 43 WED FEB 05 18 26 19 05 19 31 14 48 04 52 05 41 06 07 06 45 04 12 08 42 14 24 10.2 0.8 8 0635 2314 30 THU FEB 06 18 27 19 06 19 32 15 46 05 50 05 40 06 06 06 45 04 17 08 46 14 27 10.1 0.0 0 0737 2254 16 FRI FEB 07 18 27 19 06 19 32 16 49 06 46 05 40 06 06 06 45 04 21 08 50 14 31 10.1 0.0 0 0839 2101 03 SAT FEB 08 18 28 19 07 19 32 17 54 05 40 06 06 06 44 04 25 08 54 14 35 10.1 0.0 0 0941 1740 11 SUN FEB 09 18 28 19 07 19 33 18 59 05 39 06 05 06 44 04 30 08 58 14 38 10.1 0.0 0 1041 1305 26 MON FEB 10 18 29 19 07 19 33 20 03 05 39 06 05 06 43 04 34 09 02 14 42 10.1 0.5 4 1139 0741 40 TUE FEB 11 18 29 19 08 19 34 21 06 05 39 06 04 06 43 04 39 09 06 14 46 10.1 1.5 15 1234 0151 54 WED FEB 12 18 30 19 08 19 34 22 07 05 38 06 04 06 42 04 43 09 10 14 49 10.1 2.5 25 1329-0359 68 THU FEB 13 18 30 19 09 19 35 23 07 05 38 06 04 06 42 04 48 09 14 14 53 10.0 3.5 35 1422-0925 81 FRI FEB 14 18 31 19 09 19 35 00 06 05 37 06 03 06 41 04 52 09 18 14 56 10.0 4.5 45 1517-1417 >90 SAT FEB 15 18 31 19 10 19 35 01 05 05 37 06 03 06 41 04 56 09 22 14 59 10.0 5.5 54 1611-1814 >90 SUN FEB 16 18 32 19 10 19 36 02 03 05 36 06 02 06 40 05 01 09 26 15 02 10.0 6.4 64 1706-2107 >90 MON FEB 17 18 32 19 10 19 36 03 00 05 36 06 01 06 40 05 05 09 29 15 06 10.0 7.4 73 1802-2250 >90 TUE FEB 18 18 33 19 11 19 36 03 54 14 35 05 35 06 01 06 39 05 09 09 33 15 09 10.0 8.3 83 1857-2320 >90 WED FEB 19 18 33 19 11 19 37 04 45 15 29 05 35 06 00 06 38 05 14 09 37 15 13 10.0 9.1 91 1951-2239 >90 THU FEB 20 18 33 19 11 19 37 05 32 16 22 05 34 06 00 06 38 05 18 09 41 15 16 9.9 9.9 99 2043-2054 >90 FRI FEB 21 18 34 19 12 19 38 06 15 17 16 05 34 05 59 06 37 05 23 09 45 15 20 9.9 9.9 100 2133-1813 >90 SAT FEB 22 18 34 19 12 19 38 06 54 18 08 05 33 05 59 06 36 05 26 09 49 15 23 9.9 9.9 100 2220-1449 >90 SUN FEB 23 18 35 19 13 19 38 18 58 05 32 05 58 06 36 05 30 09 53 15 26 9.9 9.9 100 2306-1052 >90 MON FEB 24 18 35 19 13 19 39 19 47 05 32 05 57 06 35 05 35 09 57 15 30 9.9 9.8 98 2350-0631 >90 TUE FEB 25 18 35 19 13 19 39 20 35 05 31 05 57 06 34 05 39 10 01 15 33 9.9 8.9 90 0033-0158 >90 WED FEB 26 18 36 19 14 19 39 21 23 05 30 05 56 06 34 05 43 10 05 15 36 9.9 8.1 82 0116 0240 >90 THU FEB 27 18 36 19 14 19 40 22 11 05 30 05 55 06 33 05 48 10 09 15 40 9.8 7.3 74 0200 0714 >90 FRI FEB 28 18 37 19 14 19 40 23 00 05 29 05 55 06 32 05 52 10 13 15 43 9.8 6.5 66 0244 1134 >90 SAT FEB 29 18 37 19 15 19 40 23 51 05 28 05 54 06 32 05 56 10 17 15 46 9.8 5.6 57 0331 1530 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Feb 02 01:42 UT AND FOLLOWING MORNING. FULL MOON Feb 09 07:31 UT All dates and times are zone HST LAST QUARTER Feb 15 22:17 UT in upper table (except sid time). NEW MOON Feb 23 15:29 UT