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 FRI AUG 01 19 10 19 50 20 19 17 45 05 47 04 38 05 06 05 47 16 40 20 21 01 00 8.3 0.0 0 2007-1607 36 SAT AUG 02 19 09 19 50 20 18 18 38 06 52 04 39 05 07 05 47 16 43 20 25 01 05 8.4 0.0 0 2108-1152 33 SUN AUG 03 19 09 19 49 20 17 19 26 04 39 05 07 05 48 16 46 20 29 01 09 8.4 0.0 0 2206-0656 36 MON AUG 04 19 08 19 48 20 17 20 12 04 40 05 08 05 48 16 50 20 33 01 14 8.4 0.0 0 2301-0143 42 TUE AUG 05 19 07 19 48 20 16 20 55 04 40 05 08 05 48 16 52 20 37 01 18 8.4 0.6 7 2355 0324 51 WED AUG 06 19 07 19 47 20 15 21 38 04 41 05 09 05 49 16 55 20 41 01 23 8.4 1.4 16 0048 0808 61 THU AUG 07 19 06 19 46 20 14 22 20 04 41 05 09 05 49 16 58 20 45 01 27 8.4 2.1 24 0140 1215 71 FRI AUG 08 19 06 19 46 20 14 23 03 04 42 05 09 05 50 17 02 20 49 01 32 8.5 2.8 33 0231 1536 81 SAT AUG 09 19 05 19 45 20 13 23 47 04 42 05 10 05 50 17 05 20 53 01 36 8.5 3.6 42 0320 1753 >90 SUN AUG 10 19 05 19 44 20 12 00 33 04 43 05 10 05 50 17 08 20 57 01 41 8.5 4.3 51 0414 1944 >90 MON AUG 11 19 04 19 44 20 11 01 21 14 23 04 43 05 11 05 51 17 11 21 01 01 45 8.5 5.2 60 0505 2023 >90 TUE AUG 12 19 03 19 43 20 11 02 10 15 12 04 44 05 11 05 51 17 15 21 05 01 49 8.6 6.0 69 0555 2006 >90 WED AUG 13 19 03 19 42 20 10 03 00 15 59 04 44 05 12 05 51 17 18 21 09 01 53 8.6 6.8 79 0645 1855 >90 THU AUG 14 19 02 19 41 20 09 03 50 16 42 04 44 05 12 05 51 17 21 21 13 01 57 8.6 7.7 89 0733 1656 >90 FRI AUG 15 19 01 19 41 20 08 04 40 17 24 04 45 05 12 05 52 17 24 21 17 02 02 8.6 8.5 99 0820 1413 >90 SAT AUG 16 19 01 19 40 20 07 05 30 18 03 04 45 05 13 05 52 17 27 21 20 02 06 8.6 8.6 100 0907 1054 >90 SUN AUG 17 19 00 19 39 20 06 06 21 18 41 04 46 05 13 05 52 17 30 21 24 02 11 8.7 8.7 100 0953 0707 >90 MON AUG 18 18 59 19 38 20 06 19 18 04 46 05 13 05 53 17 34 21 28 02 15 8.7 8.7 100 1038 0300 >90 TUE AUG 19 18 58 19 37 20 05 19 55 04 47 05 14 05 53 17 37 21 32 02 20 8.7 8.7 100 1124-0118 >90 WED AUG 20 18 58 19 37 20 04 20 32 04 47 05 14 05 53 17 40 21 36 02 24 8.7 8.3 94 1210-0539 >90 THU AUG 21 18 57 19 36 20 03 21 11 04 48 05 15 05 54 17 43 21 40 02 29 8.8 7.6 87 1258-0951 >90 FRI AUG 22 18 56 19 35 20 02 21 53 04 48 05 15 05 54 17 45 21 44 02 33 8.8 6.9 78 1349-1342 >90 SAT AUG 23 18 55 19 34 20 01 22 39 04 48 05 15 05 54 17 48 21 48 02 37 8.8 6.2 70 1441-1658 >90 SUN AUG 24 18 54 19 33 20 00 23 29 04 49 05 16 05 54 17 51 21 52 02 42 8.8 5.3 60 1537-1927 >90 MON AUG 25 18 54 19 32 19 59 00 23 04 49 05 16 05 55 17 54 21 56 02 46 8.8 4.4 50 1637-2045 88 TUE AUG 26 18 53 19 32 19 58 01 22 04 49 05 16 05 55 17 57 22 00 02 50 8.8 3.4 38 1737-2101 76 WED AUG 27 18 52 19 31 19 57 14 35 02 24 04 50 05 16 05 55 18 00 22 04 02 55 8.9 2.4 27 1839-1953 64 THU AUG 28 18 51 19 30 19 56 15 31 03 28 04 50 05 17 05 55 18 03 22 08 02 59 8.9 1.4 15 1940-1722 52 FRI AUG 29 18 50 19 29 19 55 16 24 04 32 04 51 05 17 05 56 18 06 22 12 03 03 8.9 0.3 3 2041-1342 40 SAT AUG 30 18 50 19 28 19 54 17 14 05 34 04 51 05 17 05 56 18 09 22 16 03 07 9.0 0.0 0 2139-0909 30 SUN AUG 31 18 49 19 27 19 53 18 01 06 36 04 51 05 18 05 56 18 12 22 20 03 11 9.0 0.0 0 2236-0405 24 ONE LINE REFERS TO EVENING DATE FULL MOON Aug 03 01:46 UT AND FOLLOWING MORNING. LAST QUARTER Aug 10 00:24 UT All dates and times are zone HST NEW MOON Aug 18 04:34 UT in upper table (except sid time). FIRST QUARTER Aug 25 18:40 UT