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 WED JAN 01 18 05 18 45 19 12 23 59 05 39 06 06 06 46 01 35 06 24 12 04 10.4 5.7 54 0016-0358 >90 THU JAN 02 18 06 18 46 19 13 00 47 05 39 06 06 06 46 01 40 06 28 12 08 10.4 4.9 46 0100 0039 82 FRI JAN 03 18 06 18 47 19 14 01 36 05 39 06 06 06 47 01 45 06 32 12 12 10.4 4.1 38 0144 0521 71 SAT JAN 04 18 07 18 47 19 14 02 26 05 40 06 07 06 47 01 49 06 36 12 17 10.4 3.2 30 0229 0956 60 SUN JAN 05 18 07 18 48 19 15 03 18 05 40 06 07 06 47 01 54 06 40 12 21 10.4 2.4 22 0317 1412 49 MON JAN 06 18 08 18 48 19 15 14 33 04 14 05 40 06 07 06 47 01 58 06 44 12 25 10.4 1.4 13 0409 1757 37 TUE JAN 07 18 09 18 49 19 16 15 18 05 12 05 41 06 07 06 48 02 03 06 48 12 30 10.4 0.5 4 0504 2054 24 WED JAN 08 18 09 18 50 19 16 16 09 06 11 05 41 06 08 06 48 02 07 06 52 12 34 10.4 0.0 0 0602 2246 12 THU JAN 09 18 10 18 50 19 17 17 05 05 41 06 08 06 48 02 12 06 56 12 38 10.4 0.0 0 0703 2315 04 FRI JAN 10 18 11 18 51 19 18 18 06 05 41 06 08 06 48 02 17 07 00 12 42 10.4 0.0 0 0806 2214 16 SAT JAN 11 18 11 18 51 19 18 19 09 05 42 06 08 06 48 02 21 07 04 12 47 10.4 0.0 0 0907 1944 29 SUN JAN 12 18 12 18 52 19 19 20 13 05 42 06 09 06 49 02 26 07 08 12 50 10.4 0.9 8 1007 1556 43 MON JAN 13 18 12 18 53 19 19 21 16 05 42 06 09 06 49 02 30 07 11 12 54 10.4 1.9 18 1104 1110 56 TUE JAN 14 18 13 18 53 19 20 22 17 05 42 06 09 06 49 02 35 07 15 12 58 10.4 2.9 28 1159 0548 70 WED JAN 15 18 14 18 54 19 20 23 17 05 42 06 09 06 49 02 39 07 19 13 02 10.4 3.9 38 1251 0009 83 THU JAN 16 18 14 18 54 19 21 00 15 05 42 06 09 06 49 02 44 07 23 13 06 10.3 4.9 47 1344-0520 >90 FRI JAN 17 18 15 18 55 19 22 01 13 05 42 06 09 06 49 02 48 07 27 13 10 10.3 5.8 56 1436-1029 >90 SAT JAN 18 18 16 18 55 19 22 02 12 05 43 06 09 06 49 02 52 07 31 13 15 10.3 6.8 66 1529-1502 >90 SUN JAN 19 18 16 18 56 19 23 03 10 14 08 05 43 06 09 06 49 02 57 07 35 13 19 10.3 7.8 75 1623-1843 >90 MON JAN 20 18 17 18 57 19 23 04 08 14 56 05 43 06 09 06 49 03 01 07 39 13 23 10.3 8.8 84 1718-2122 >90 TUE JAN 21 18 18 18 57 19 24 05 04 15 46 05 43 06 09 06 49 03 06 07 43 13 27 10.3 9.7 93 1813-2251 >90 WED JAN 22 18 18 18 58 19 24 05 58 16 39 05 43 06 09 06 49 03 10 07 47 13 31 10.3 10.3 100 1909-2307 >90 THU JAN 23 18 19 18 58 19 25 06 49 17 34 05 43 06 09 06 49 03 15 07 51 13 35 10.3 10.3 100 2003-2213 >90 FRI JAN 24 18 19 18 59 19 25 18 29 05 43 06 09 06 49 03 19 07 55 13 39 10.3 10.3 100 2055-2014 >90 SAT JAN 25 18 20 18 59 19 26 19 22 05 43 06 09 06 48 03 24 07 59 13 43 10.3 10.3 100 2145-1723 >90 SUN JAN 26 18 21 19 00 19 26 20 14 05 43 06 09 06 48 03 28 08 03 13 47 10.3 9.5 92 2232-1349 >90 MON JAN 27 18 21 19 01 19 27 21 04 05 42 06 09 06 48 03 33 08 07 13 50 10.2 8.6 84 2318-0945 >90 TUE JAN 28 18 22 19 01 19 27 21 52 05 42 06 09 06 48 03 37 08 11 13 54 10.2 7.8 76 0002-0521 >90 WED JAN 29 18 22 19 02 19 28 22 40 05 42 06 08 06 48 03 42 08 15 13 57 10.2 7.0 68 0045-0046 >90 THU JAN 30 18 23 19 02 19 28 23 28 05 42 06 08 06 47 03 46 08 18 14 01 10.2 6.2 60 0128 0352 >90 FRI JAN 31 18 24 19 03 19 29 00 17 05 42 06 08 06 47 03 51 08 22 14 05 10.2 5.4 53 0214 0815 89 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Jan 03 04:46 UT AND FOLLOWING MORNING. FULL MOON Jan 10 19:21 UT All dates and times are zone HST LAST QUARTER Jan 17 12:59 UT in upper table (except sid time). NEW MOON Jan 24 21:41 UT