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 THU MAY 01 18 55 19 35 20 03 02 43 04 35 05 03 05 42 10 21 14 19 18 54 8.5 1.9 21 1041 0210 56 FRI MAY 02 18 56 19 36 20 03 14 43 03 21 04 34 05 02 05 42 10 25 14 23 18 57 8.5 1.2 14 1130-0232 48 SAT MAY 03 18 56 19 36 20 04 15 38 04 02 04 34 05 01 05 41 10 30 14 26 19 01 8.5 0.5 6 1221-0717 41 SUN MAY 04 18 56 19 36 20 04 16 34 04 46 04 33 05 01 05 41 10 34 14 30 19 04 8.5 0.0 0 1314-1151 37 MON MAY 05 18 57 19 37 20 05 17 34 05 35 04 32 05 00 05 40 10 39 14 34 19 07 8.4 0.0 0 1411-1554 36 TUE MAY 06 18 57 19 37 20 05 18 36 06 28 04 31 04 59 05 40 10 43 14 38 19 10 8.4 0.0 0 1511-1906 40 WED MAY 07 18 58 19 38 20 06 19 39 04 31 04 59 05 39 10 48 14 42 19 14 8.4 0.0 0 1614-2106 47 THU MAY 08 18 58 19 38 20 06 20 43 04 30 04 58 05 39 10 52 14 46 19 17 8.4 0.6 7 1718-2140 56 FRI MAY 09 18 58 19 39 20 07 21 43 04 29 04 58 05 38 10 56 14 50 19 20 8.4 1.6 19 1821-2045 66 SAT MAY 10 18 59 19 39 20 08 22 39 04 29 04 57 05 38 11 01 14 54 19 24 8.3 2.5 30 1923-1826 76 SUN MAY 11 18 59 19 40 20 08 23 31 04 28 04 57 05 37 11 05 14 58 19 27 8.3 3.4 40 2021-1500 87 MON MAY 12 19 00 19 40 20 09 00 18 04 28 04 56 05 37 11 10 15 02 19 31 8.3 4.2 49 2117-1056 >90 TUE MAY 13 19 00 19 41 20 09 01 01 04 27 04 55 05 36 11 14 15 06 19 34 8.3 4.9 58 2210-0620 >90 WED MAY 14 19 00 19 41 20 10 01 42 04 26 04 55 05 36 11 19 15 10 19 37 8.3 5.5 66 2300-0133 >90 THU MAY 15 19 01 19 42 20 10 02 22 14 26 04 26 04 55 05 35 11 23 15 14 19 41 8.3 6.2 75 2349 0311 >90 FRI MAY 16 19 01 19 42 20 11 03 01 15 20 04 25 04 54 05 35 11 28 15 18 19 43 8.2 6.8 82 0038 0739 >90 SAT MAY 17 19 02 19 43 20 12 03 42 16 14 04 25 04 54 05 35 11 33 15 22 19 47 8.2 7.5 91 0127 1140 >90 SUN MAY 18 19 02 19 43 20 12 04 24 17 08 04 24 04 53 05 34 11 37 15 26 19 50 8.2 8.2 100 0216 1505 >90 MON MAY 19 19 03 19 44 20 13 05 08 18 01 04 24 04 53 05 34 11 42 15 30 19 54 8.2 8.2 100 0307 1745 >90 TUE MAY 20 19 03 19 44 20 13 05 54 18 54 04 23 04 52 05 34 11 46 15 33 19 57 8.2 8.2 100 0357 1933 >90 WED MAY 21 19 03 19 45 20 14 06 42 19 45 04 23 04 52 05 33 11 51 15 37 20 01 8.1 8.1 100 0448 2026 >90 THU MAY 22 19 04 19 45 20 14 20 34 04 23 04 52 05 33 11 55 15 41 20 05 8.1 7.8 95 0539 2021 >90 FRI MAY 23 19 04 19 46 20 15 21 21 04 22 04 51 05 33 12 00 15 45 20 08 8.1 7.0 86 0629 1922 >90 SAT MAY 24 19 05 19 46 20 15 22 05 04 22 04 51 05 33 12 04 15 49 20 12 8.1 6.3 77 0717 1732 >90 SUN MAY 25 19 05 19 47 20 16 22 46 04 21 04 51 05 32 12 09 15 53 20 15 8.1 5.6 69 0805 1456 >90 MON MAY 26 19 06 19 47 20 17 23 25 04 21 04 50 05 32 12 14 15 57 20 19 8.1 4.9 61 0852 1141 >90 TUE MAY 27 19 06 19 48 20 17 00 02 04 21 04 50 05 32 12 17 16 01 20 23 8.1 4.3 53 0944 0723 >90 WED MAY 28 19 06 19 48 20 18 00 39 04 20 04 50 05 32 12 22 16 05 20 26 8.0 3.7 45 1025 0339 84 THU MAY 29 19 07 19 49 20 18 01 16 04 20 04 50 05 32 12 26 16 09 20 30 8.0 3.1 38 1111-0046 76 FRI MAY 30 19 07 19 49 20 19 01 55 04 20 04 50 05 31 12 31 16 13 20 34 8.0 2.4 30 1200-0526 67 SAT MAY 31 19 08 19 50 20 19 14 19 02 36 04 20 04 49 05 31 12 35 16 17 20 38 8.0 1.7 21 1251-0959 59 ONE LINE REFERS TO EVENING DATE FULL MOON May 07 03:39 UT AND FOLLOWING MORNING. LAST QUARTER May 13 19:08 UT All dates and times are zone HST NEW MOON May 21 07:15 UT in upper table (except sid time). FIRST QUARTER May 29 11:19 UT