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 OCT 01 18 21 18 58 19 24 18 47 05 00 05 25 06 03 19 45 00 22 05 23 9.6 0.0 0 0149 1253 22 THU OCT 02 18 20 18 57 19 23 19 33 05 00 05 26 06 03 19 48 00 26 05 27 9.6 0.2 1 0243 1611 33 FRI OCT 03 18 19 18 57 19 22 20 19 05 00 05 26 06 03 19 51 00 30 05 31 9.6 1.0 9 0337 1833 44 SAT OCT 04 18 18 18 56 19 21 21 07 05 00 05 26 06 04 19 54 00 34 05 34 9.6 1.8 18 0431 1953 55 SUN OCT 05 18 17 18 55 19 20 21 56 05 01 05 26 06 04 19 57 00 38 05 39 9.7 2.6 26 0523 2013 67 MON OCT 06 18 16 18 54 19 19 22 47 05 01 05 26 06 04 20 00 00 42 05 43 9.7 3.5 35 0615 1934 78 TUE OCT 07 18 16 18 53 19 19 23 37 05 01 05 27 06 04 20 04 00 45 05 47 9.7 4.3 44 0704 1758 88 WED OCT 08 18 15 18 52 19 18 00 27 05 01 05 27 06 05 20 07 00 49 05 51 9.7 5.2 53 0753 1548 >90 THU OCT 09 18 14 18 52 19 17 01 17 05 02 05 27 06 05 20 10 00 53 05 56 9.8 6.0 61 0841 1252 >90 FRI OCT 10 18 13 18 51 19 16 02 07 14 36 05 02 05 27 06 05 20 13 00 57 06 00 9.8 6.9 70 0927 0923 >90 SAT OCT 11 18 12 18 50 19 15 02 57 15 14 05 02 05 28 06 05 20 15 01 01 06 04 9.8 7.7 78 1013 0529 >90 SUN OCT 12 18 12 18 49 19 15 03 48 15 51 05 02 05 28 06 06 20 19 01 05 06 08 9.8 8.5 87 1059 0117 >90 MON OCT 13 18 11 18 48 19 14 04 39 16 29 05 03 05 28 06 06 20 22 01 09 06 13 9.8 9.4 95 1146-0304 >90 TUE OCT 14 18 10 18 48 19 13 05 33 17 08 05 03 05 29 06 06 20 25 01 13 06 17 9.8 9.8 100 1234-0722 >90 WED OCT 15 18 09 18 47 19 12 06 29 17 49 05 03 05 29 06 07 20 28 01 17 06 21 9.8 9.8 100 1324-1125 >90 THU OCT 16 18 08 18 46 19 12 18 34 05 04 05 29 06 07 20 32 01 21 06 26 9.9 9.9 100 1417-1501 >90 FRI OCT 17 18 08 18 46 19 11 19 22 05 04 05 29 06 07 20 35 01 25 06 30 9.9 9.7 98 1512-1752 >90 SAT OCT 18 18 07 18 45 19 10 20 15 05 04 05 30 06 08 20 38 01 29 06 34 9.9 8.8 89 1609-1945 >90 SUN OCT 19 18 06 18 44 19 10 21 11 05 04 05 30 06 08 20 42 01 33 06 38 9.9 7.9 79 1708-2029 >90 MON OCT 20 18 06 18 43 19 09 22 10 05 05 05 30 06 08 20 45 01 37 06 43 9.9 6.9 69 1808-1958 >90 TUE OCT 21 18 05 18 43 19 08 23 11 05 05 05 31 06 09 20 48 01 41 06 46 10.0 5.9 59 1907-1813 >90 WED OCT 22 18 04 18 42 19 08 00 12 05 05 05 31 06 09 20 52 01 45 06 50 10.0 4.9 49 2008-1507 >90 THU OCT 23 18 04 18 42 19 07 01 12 05 06 05 31 06 09 20 55 01 49 06 55 10.0 3.9 39 2101-1135 77 FRI OCT 24 18 03 18 41 19 07 02 11 05 06 05 32 06 10 20 59 01 52 06 59 10.0 2.9 29 2156-0713 64 SAT OCT 25 18 02 18 40 19 06 14 32 03 09 05 06 05 32 06 10 21 02 01 56 07 03 10.0 1.9 19 2249-0225 51 SUN OCT 26 18 02 18 40 19 06 15 15 04 06 05 07 05 32 06 10 21 06 02 00 07 08 10.0 1.0 10 2342 0228 38 MON OCT 27 18 01 18 39 19 05 15 57 05 03 05 07 05 33 06 11 21 09 02 04 07 12 10.0 0.1 0 0035 0711 25 TUE OCT 28 18 00 18 39 19 05 16 40 06 00 05 07 05 33 06 11 21 12 02 08 07 16 10.0 0.0 0 0128 1127 13 WED OCT 29 18 00 18 38 19 04 17 24 06 57 05 08 05 33 06 12 21 15 02 12 07 21 10.1 0.0 0 0221 1503 05 THU OCT 30 17 59 18 38 19 04 18 10 05 08 05 34 06 12 21 19 02 16 07 25 10.1 0.0 0 0315 1747 14 FRI OCT 31 17 59 18 37 19 03 18 58 05 08 05 34 06 13 21 22 02 20 07 29 10.1 0.0 0 0410 1932 26 ONE LINE REFERS TO EVENING DATE LAST QUARTER Oct 08 10:52 UT AND FOLLOWING MORNING. NEW MOON Oct 16 08:20 UT All dates and times are zone HST FIRST QUARTER Oct 23 07:37 UT in upper table (except sid time). FULL MOON Oct 30 07:34 UT