KECK OBSERVATORY CALENDAR FOR 2031 -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 2031 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 DEC 01 17 52 18 32 18 59 20 10 05 23 05 50 06 30 22 53 04 22 10 13 11.3 1.6 14 0720 1734 42 TUE DEC 02 17 53 18 33 19 00 21 01 05 23 05 50 06 30 22 58 04 26 10 17 11.3 2.5 21 0809 1502 53 WED DEC 03 17 53 18 33 19 00 21 50 05 24 05 51 06 31 23 02 04 30 10 22 11.3 3.3 29 0856 1153 64 THU DEC 04 17 53 18 33 19 00 22 39 05 24 05 51 06 32 23 06 04 34 10 26 11.3 4.1 36 0942 0816 75 FRI DEC 05 17 53 18 33 19 00 23 28 05 25 05 52 06 32 23 10 04 38 10 31 11.3 4.9 43 1027 0416 86 SAT DEC 06 17 53 18 34 19 01 00 17 05 25 05 52 06 33 23 15 04 42 10 35 11.3 5.7 50 1113 0009 >90 SUN DEC 07 17 53 18 34 19 01 01 08 05 26 05 53 06 33 23 19 04 46 10 40 11.3 6.6 58 1159-0406 >90 MON DEC 08 17 54 18 34 19 01 02 00 05 27 05 54 06 34 23 23 04 50 10 45 11.3 7.4 65 1247-0816 >90 TUE DEC 09 17 54 18 34 19 01 02 55 14 15 05 27 05 54 06 35 23 27 04 54 10 49 11.3 8.3 73 1337-1212 >90 WED DEC 10 17 54 18 35 19 02 03 52 15 00 05 28 05 55 06 35 23 32 04 58 10 54 11.3 9.3 81 1430-1538 >90 THU DEC 11 17 55 18 35 19 02 04 53 15 49 05 28 05 55 06 36 23 36 05 02 10 58 11.3 10.3 90 1527-1818 >90 FRI DEC 12 17 55 18 35 19 03 05 55 16 43 05 29 05 56 06 36 23 40 05 06 11 03 11.3 11.3 99 1627-1957 >90 SAT DEC 13 17 55 18 36 19 03 06 57 17 43 05 29 05 56 06 37 23 45 05 10 11 07 11.3 11.3 100 1729-2020 >90 SUN DEC 14 17 56 18 36 19 03 18 46 05 30 05 57 06 38 23 49 05 14 11 12 11.3 11.2 98 1831-1920 >90 MON DEC 15 17 56 18 37 19 04 19 50 05 30 05 58 06 38 23 54 05 17 11 16 11.3 10.1 89 1932-1702 >90 TUE DEC 16 17 56 18 37 19 04 20 55 05 31 05 58 06 39 23 58 05 21 11 20 11.3 9.1 79 2032-1338 >90 WED DEC 17 17 57 18 37 19 05 21 57 05 32 05 59 06 39 00 01 05 25 11 25 11.4 8.0 70 2129-0926 >90 THU DEC 18 17 57 18 38 19 05 22 57 05 32 05 59 06 40 00 06 05 29 11 29 11.4 7.0 61 2223-0446 >90 FRI DEC 19 17 58 18 38 19 05 23 56 05 33 06 00 06 40 00 10 05 33 11 34 11.4 6.1 53 2316 0004 >90 SAT DEC 20 17 58 18 39 19 06 00 52 05 33 06 00 06 41 00 15 05 37 11 38 11.4 5.1 45 0008 0446 81 SUN DEC 21 17 59 18 39 19 06 01 48 05 34 06 01 06 41 00 19 05 41 11 43 11.4 4.2 37 0059 0910 69 MON DEC 22 17 59 18 40 19 07 02 43 05 34 06 01 06 42 00 24 05 45 11 47 11.4 3.3 29 0150 1302 57 TUE DEC 23 18 00 18 40 19 07 14 03 03 37 05 35 06 02 06 42 00 28 05 49 11 52 11.4 2.4 21 0242 1613 45 WED DEC 24 18 00 18 41 19 08 14 48 04 31 05 35 06 02 06 43 00 33 05 53 11 56 11.4 1.5 13 0334 1833 33 THU DEC 25 18 01 18 41 19 08 15 35 05 23 05 36 06 03 06 43 00 37 05 57 12 01 11.4 0.7 5 0427 1957 21 FRI DEC 26 18 01 18 42 19 09 16 23 06 13 05 36 06 03 06 44 00 42 06 01 12 05 11.3 0.0 0 0520 2022 10 SAT DEC 27 18 02 18 42 19 10 17 14 05 36 06 04 06 44 00 46 06 05 12 10 11.4 0.0 0 0613 1948 02 SUN DEC 28 18 02 18 43 19 10 18 04 05 37 06 04 06 44 00 51 06 09 12 14 11.3 0.0 0 0704 1818 13 MON DEC 29 18 03 18 44 19 11 18 55 05 37 06 04 06 45 00 56 06 13 12 18 11.3 0.2 1 0754 1600 24 TUE DEC 30 18 04 18 44 19 11 19 44 05 38 06 05 06 45 01 00 06 17 12 23 11.3 1.0 8 0842 1303 35 WED DEC 31 18 04 18 45 19 12 20 34 05 38 06 05 06 46 01 05 06 21 12 27 11.3 1.8 16 0928 0934 46 ONE LINE REFERS TO EVENING DATE LAST QUARTER Dec 07 03:21 UT AND FOLLOWING MORNING. NEW MOON Dec 14 09:06 UT All dates and times are zone HST FIRST QUARTER Dec 21 00:00 UT in upper table (except sid time). FULL MOON Dec 28 17:32 UT