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 TUE JUL 01 19 16 19 58 20 29 16 02 03 49 04 23 04 53 05 35 14 48 18 19 22 43 7.9 0.6 7 1619-2111 50 WED JUL 02 19 16 19 59 20 29 17 05 04 52 04 23 04 53 05 36 14 51 18 23 22 47 7.9 0.0 0 1723-2140 44 THU JUL 03 19 16 19 59 20 29 18 08 05 57 04 24 04 54 05 36 14 55 18 27 22 52 7.9 0.0 0 1829-2036 40 FRI JUL 04 19 16 19 59 20 29 19 07 04 24 04 54 05 36 14 59 18 31 22 56 7.9 0.0 0 1934-1803 41 SAT JUL 05 19 16 19 59 20 28 20 01 04 24 04 54 05 37 15 02 18 35 23 00 7.9 0.0 0 2036-1416 45 SUN JUL 06 19 16 19 58 20 28 20 51 04 25 04 55 05 37 15 06 18 39 23 05 7.9 0.4 4 2134-0939 52 MON JUL 07 19 16 19 58 20 28 21 37 04 25 04 55 05 37 15 10 18 43 23 08 7.9 1.1 14 2230-0438 61 TUE JUL 08 19 16 19 58 20 28 22 20 04 26 04 56 05 38 15 14 18 47 23 13 8.0 1.9 23 2323 0027 70 WED JUL 09 19 16 19 58 20 28 23 01 04 26 04 56 05 38 15 18 18 51 23 17 8.0 2.5 32 0014 0517 80 THU JUL 10 19 16 19 58 20 28 23 42 04 27 04 56 05 39 15 22 18 55 23 22 8.0 3.2 40 0103 0934 89 FRI JUL 11 19 16 19 58 20 28 00 23 04 27 04 57 05 39 15 26 18 59 23 26 8.0 3.9 49 0155 1330 >90 SAT JUL 12 19 16 19 58 20 27 01 06 04 28 04 57 05 39 15 29 19 02 23 31 8.0 4.6 58 0245 1633 >90 SUN JUL 13 19 16 19 58 20 27 01 50 14 45 04 28 04 58 05 40 15 33 19 06 23 35 8.0 5.4 67 0335 1846 >90 MON JUL 14 19 15 19 57 20 27 02 36 15 37 04 29 04 58 05 40 15 37 19 10 23 40 8.0 6.1 76 0426 2005 >90 TUE JUL 15 19 15 19 57 20 27 03 24 16 27 04 29 04 59 05 40 15 41 19 14 23 44 8.0 6.9 86 0516 2029 >90 WED JUL 16 19 15 19 57 20 26 04 14 17 16 04 30 04 59 05 41 15 44 19 18 23 49 8.1 7.8 96 0606 1957 >90 THU JUL 17 19 15 19 57 20 26 05 04 18 01 04 30 05 00 05 41 15 48 19 22 23 53 8.1 8.1 100 0656 1832 >90 FRI JUL 18 19 15 19 56 20 26 05 54 18 44 04 31 05 00 05 42 15 52 19 26 23 58 8.1 8.1 100 0744 1620 >90 SAT JUL 19 19 14 19 56 20 25 06 44 19 24 04 31 05 00 05 42 15 54 19 30 00 02 8.1 8.1 100 0831 1326 >90 SUN JUL 20 19 14 19 56 20 25 20 03 04 32 05 01 05 42 15 58 19 34 00 07 8.1 8.1 100 0917 0959 >90 MON JUL 21 19 14 19 55 20 24 20 40 04 32 05 01 05 43 16 01 19 38 00 11 8.1 7.9 96 1002 0605 >90 TUE JUL 22 19 14 19 55 20 24 21 16 04 33 05 02 05 43 16 05 19 42 00 16 8.2 7.3 89 1047 0153 >90 WED JUL 23 19 13 19 55 20 24 21 53 04 33 05 02 05 44 16 09 19 46 00 20 8.2 6.7 81 1133-0229 >90 THU JUL 24 19 13 19 54 20 23 22 31 04 34 05 03 05 44 16 12 19 50 00 25 8.2 6.1 73 1220-0652 >90 FRI JUL 25 19 13 19 54 20 23 23 11 04 34 05 03 05 44 16 16 19 54 00 28 8.2 5.4 65 1309-1104 >90 SAT JUL 26 19 12 19 53 20 22 23 54 04 35 05 04 05 45 16 19 19 58 00 33 8.2 4.7 56 1400-1453 >90 SUN JUL 27 19 12 19 53 20 21 00 42 04 35 05 04 05 45 16 22 20 02 00 37 8.2 3.9 47 1456-1801 84 MON JUL 28 19 11 19 52 20 21 01 35 04 36 05 05 05 46 16 26 20 06 00 42 8.2 3.0 36 1554-2022 74 TUE JUL 29 19 11 19 52 20 20 14 48 02 33 04 37 05 05 05 46 16 29 20 09 00 47 8.3 2.1 24 1656-2127 63 WED JUL 30 19 10 19 51 20 20 15 49 03 36 04 37 05 06 05 46 16 33 20 13 00 51 8.3 1.0 12 1759-2107 52 THU JUL 31 19 10 19 51 20 19 16 49 04 41 04 38 05 06 05 47 16 36 20 17 00 56 8.3 0.0 0 1904-1918 43 ONE LINE REFERS TO EVENING DATE FULL MOON Jul 04 19:01 UT AND FOLLOWING MORNING. LAST QUARTER Jul 11 11:50 UT All dates and times are zone HST NEW MOON Jul 19 13:41 UT in upper table (except sid time). FIRST QUARTER Jul 27 10:35 UT