KECK OBSERVATORY CALENDAR FOR 2021 -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 2021 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 SUN AUG 01 19 10 19 50 20 19 00 53 04 38 05 06 05 47 16 12 20 23 01 30 9.3 5.0 54 0358 1908 >90 MON AUG 02 19 09 19 50 20 18 01 34 14 42 04 39 05 07 05 47 16 16 20 27 01 35 9.3 5.7 61 0447 2206 >90 TUE AUG 03 19 09 19 49 20 17 02 19 15 35 04 39 05 07 05 48 16 19 20 31 01 39 9.3 6.5 69 0538 2407 >90 WED AUG 04 19 08 19 48 20 17 03 09 16 28 04 40 05 08 05 48 16 22 20 35 01 44 9.3 7.4 78 0631 2501 >90 THU AUG 05 19 07 19 48 20 16 04 03 17 20 04 40 05 08 05 48 16 26 20 39 01 48 9.3 8.3 88 0724 2443 >90 FRI AUG 06 19 07 19 47 20 15 04 59 18 11 04 41 05 09 05 49 16 29 20 43 01 53 9.4 9.2 98 0818 2309 >90 SAT AUG 07 19 06 19 46 20 14 05 57 18 58 04 41 05 09 05 49 16 32 20 47 01 56 9.4 9.4 100 0912 2022 >90 SUN AUG 08 19 06 19 46 20 14 06 55 19 42 04 42 05 09 05 50 16 36 20 51 02 00 9.4 9.4 100 1004 1631 >90 MON AUG 09 19 05 19 45 20 13 20 23 04 42 05 10 05 50 16 39 20 55 02 05 9.4 8.8 93 1054 1145 >90 TUE AUG 10 19 05 19 44 20 12 21 02 04 43 05 10 05 50 16 42 20 58 02 09 9.4 8.1 86 1144 0620 >90 WED AUG 11 19 04 19 44 20 11 21 40 04 43 05 11 05 51 16 46 21 02 02 14 9.4 7.5 79 1233 0031 >90 THU AUG 12 19 03 19 43 20 11 22 19 04 44 05 11 05 51 16 49 21 06 02 18 9.5 6.9 72 1323-0526 >90 FRI AUG 13 19 03 19 42 20 10 22 59 04 44 05 12 05 51 16 52 21 10 02 23 9.5 6.2 65 1414-1113 >90 SAT AUG 14 19 02 19 41 20 09 23 42 04 44 05 12 05 51 16 55 21 14 02 27 9.5 5.5 57 1508-1632 >90 SUN AUG 15 19 01 19 41 20 08 00 30 04 45 05 12 05 52 16 58 21 18 02 31 9.5 4.7 49 1605-2055 87 MON AUG 16 19 01 19 40 20 07 01 22 04 45 05 13 05 52 17 01 21 22 02 36 9.6 3.9 40 1705-2416 77 TUE AUG 17 19 00 19 39 20 06 14 50 02 21 04 46 05 13 05 52 17 04 21 26 02 40 9.6 2.9 29 1808-2606 67 WED AUG 18 18 59 19 38 20 06 15 53 03 22 04 46 05 13 05 53 17 07 21 30 02 44 9.6 1.8 19 1911-2612 57 THU AUG 19 18 58 19 37 20 05 16 52 04 26 04 47 05 14 05 53 17 10 21 34 02 49 9.6 0.8 8 2014-2435 48 FRI AUG 20 18 58 19 37 20 04 17 45 05 28 04 47 05 14 05 53 17 14 21 38 02 53 9.6 0.0 0 2114-2129 42 SAT AUG 21 18 57 19 36 20 03 18 32 06 28 04 48 05 15 05 54 17 17 21 42 02 58 9.6 0.0 0 2210-1714 38 SUN AUG 22 18 56 19 35 20 02 19 15 04 48 05 15 05 54 17 20 21 46 03 02 9.7 0.0 0 2302-1211 37 MON AUG 23 18 55 19 34 20 01 19 53 04 48 05 15 05 54 17 23 21 50 03 06 9.7 0.3 3 2352-0642 40 TUE AUG 24 18 54 19 33 20 00 20 29 04 49 05 16 05 54 17 26 21 54 03 11 9.7 0.9 9 0039-0106 46 WED AUG 25 18 54 19 32 19 59 21 03 04 49 05 16 05 55 17 29 21 58 03 14 9.7 1.5 15 0124 0424 53 THU AUG 26 18 53 19 32 19 58 21 37 04 49 05 16 05 55 17 33 22 02 03 18 9.7 2.1 21 0209 0935 61 FRI AUG 27 18 52 19 31 19 57 22 12 04 50 05 16 05 55 17 36 22 05 03 22 9.8 2.7 27 0255 1416 69 SAT AUG 28 18 51 19 30 19 56 22 49 04 50 05 17 05 55 17 39 22 09 03 27 9.8 3.3 33 0342 1819 78 SUN AUG 29 18 50 19 29 19 55 23 28 04 51 05 17 05 56 17 42 22 13 03 31 9.8 4.0 40 0430 2132 87 MON AUG 30 18 50 19 28 19 54 00 12 04 51 05 17 05 56 17 45 22 17 03 35 9.8 4.7 48 0521 2356 >90 TUE AUG 31 18 49 19 27 19 53 01 00 14 19 04 51 05 18 05 56 17 47 22 21 03 40 9.8 5.5 56 0614 2510 >90 ONE LINE REFERS TO EVENING DATE NEW MOON Aug 08 13:50 UT AND FOLLOWING MORNING. FIRST QUARTER Aug 15 15:19 UT All dates and times are zone HST FULL MOON Aug 22 12:02 UT in upper table (except sid time). LAST QUARTER Aug 30 07:14 UT