KECK OBSERVATORY CALENDAR FOR 2031 -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 2031 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 02 10 05 39 06 06 06 46 01 37 06 25 12 05 10.4 3.5 33 0155 1459 64 THU JAN 02 18 06 18 46 19 13 03 01 05 39 06 06 06 46 01 42 06 29 12 09 10.4 2.6 25 0244 1802 53 FRI JAN 03 18 06 18 47 19 14 14 05 03 53 05 39 06 06 06 47 01 47 06 33 12 13 10.4 1.8 16 0334 2015 42 SAT JAN 04 18 07 18 47 19 14 14 49 04 43 05 40 06 07 06 47 01 51 06 37 12 18 10.4 0.9 9 0426 2134 31 SUN JAN 05 18 07 18 48 19 15 15 37 05 32 05 40 06 07 06 47 01 55 06 41 12 22 10.4 0.1 1 0517 2154 20 MON JAN 06 18 08 18 48 19 15 16 26 06 18 05 40 06 07 06 47 01 59 06 45 12 26 10.4 0.0 0 0609 2113 09 TUE JAN 07 18 09 18 49 19 16 17 17 05 41 06 07 06 48 02 04 06 49 12 31 10.4 0.0 0 0700 1934 03 WED JAN 08 18 09 18 50 19 16 18 08 05 41 06 08 06 48 02 08 06 53 12 35 10.4 0.0 0 0750 1702 14 THU JAN 09 18 10 18 50 19 17 18 59 05 41 06 08 06 48 02 13 06 57 12 39 10.4 0.0 0 0839 1344 25 FRI JAN 10 18 11 18 51 19 18 19 50 05 41 06 08 06 48 02 18 07 01 12 43 10.4 0.5 5 0927 0949 37 SAT JAN 11 18 11 18 51 19 18 20 41 05 42 06 08 06 48 02 22 07 05 12 48 10.4 1.4 13 1014 0526 48 SUN JAN 12 18 12 18 52 19 19 21 33 05 42 06 09 06 49 02 27 07 09 12 52 10.4 2.2 21 1101 0046 60 MON JAN 13 18 12 18 53 19 19 22 25 05 42 06 09 06 49 02 31 07 13 12 56 10.4 3.1 29 1149-0401 72 TUE JAN 14 18 13 18 53 19 20 23 19 05 42 06 09 06 49 02 36 07 17 13 00 10.4 4.0 38 1238-0837 84 WED JAN 15 18 14 18 54 19 20 00 15 05 42 06 09 06 49 02 40 07 21 13 04 10.4 4.9 47 1330-1300 >90 THU JAN 16 18 14 18 54 19 21 01 13 05 42 06 09 06 49 02 45 07 25 13 08 10.3 5.9 56 1424-1646 >90 FRI JAN 17 18 15 18 55 19 22 02 15 05 42 06 09 06 49 02 50 07 29 13 11 10.3 6.9 66 1522-1940 >90 SAT JAN 18 18 16 18 55 19 22 03 17 14 01 05 43 06 09 06 49 02 54 07 32 13 16 10.3 7.9 76 1622-2126 >90 SUN JAN 19 18 16 18 56 19 23 04 20 15 00 05 43 06 09 06 49 02 59 07 36 13 20 10.3 9.0 86 1725-2148 >90 MON JAN 20 18 17 18 57 19 23 05 20 16 04 05 43 06 09 06 49 03 03 07 40 13 24 10.3 10.0 96 1828-2041 >90 TUE JAN 21 18 18 18 57 19 24 06 16 17 10 05 43 06 09 06 49 03 08 07 44 13 28 10.3 10.3 100 1930-1810 >90 WED JAN 22 18 18 18 58 19 24 18 15 05 43 06 09 06 49 03 12 07 48 13 32 10.3 10.3 100 2030-1428 >90 THU JAN 23 18 19 18 58 19 25 19 19 05 43 06 09 06 49 03 16 07 52 13 36 10.3 10.3 100 2126-0957 >90 FRI JAN 24 18 19 18 59 19 25 20 20 05 43 06 09 06 49 03 20 07 56 13 40 10.3 9.4 91 2220-0458 >90 SAT JAN 25 18 20 18 59 19 26 21 18 05 43 06 09 06 48 03 25 08 00 13 44 10.3 8.4 81 2312 0008 >90 SUN JAN 26 18 21 19 00 19 26 22 14 05 43 06 09 06 48 03 29 08 04 13 48 10.3 7.5 72 0002 0503 >90 MON JAN 27 18 21 19 01 19 27 23 09 05 42 06 09 06 48 03 34 08 08 13 51 10.2 6.6 63 0051 0936 >90 TUE JAN 28 18 22 19 01 19 27 00 02 05 42 06 09 06 48 03 38 08 12 13 55 10.2 5.7 55 0146 1303 >90 WED JAN 29 18 22 19 02 19 28 00 54 05 42 06 08 06 48 03 43 08 16 13 59 10.2 4.8 46 0230 1651 81 THU JAN 30 18 23 19 02 19 28 01 46 05 42 06 08 06 47 03 47 08 20 14 03 10.2 3.9 38 0319 1923 70 FRI JAN 31 18 24 19 03 19 29 02 37 05 42 06 08 06 47 03 52 08 24 14 07 10.2 3.1 30 0410 2100 59 ONE LINE REFERS TO EVENING DATE FULL MOON Jan 08 18:27 UT AND FOLLOWING MORNING. LAST QUARTER Jan 16 12:48 UT All dates and times are zone HST NEW MOON Jan 23 04:29 UT in upper table (except sid time). FIRST QUARTER Jan 30 07:42 UT