KECK OBSERVATORY CALENDAR FOR 2020 -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 2020 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 OCT 01 18 20 18 57 19 23 18 20 05 00 05 26 06 03 19 47 00 24 05 25 9.6 0.0 0 0105 0132 21 FRI OCT 02 18 19 18 57 19 22 18 53 05 00 05 26 06 03 19 50 00 28 05 29 9.6 0.0 0 0149 0628 24 SAT OCT 03 18 18 18 56 19 21 19 26 05 00 05 26 06 04 19 53 00 32 05 33 9.6 0.1 0 0234 1108 30 SUN OCT 04 18 17 18 55 19 20 20 02 05 01 05 26 06 04 19 55 00 36 05 38 9.7 0.7 7 0320 1522 39 MON OCT 05 18 16 18 54 19 19 20 40 05 01 05 26 06 04 19 58 00 40 05 42 9.7 1.3 13 0408 1859 49 TUE OCT 06 18 16 18 53 19 19 21 22 05 01 05 27 06 04 20 02 00 44 05 46 9.7 2.0 21 0458 2147 59 WED OCT 07 18 15 18 52 19 18 22 08 05 01 05 27 06 05 20 05 00 48 05 50 9.7 2.8 29 0551 2337 70 THU OCT 08 18 14 18 52 19 17 22 58 05 02 05 27 06 05 20 08 00 52 05 55 9.8 3.7 37 0645 2418 81 FRI OCT 09 18 13 18 51 19 16 23 53 05 02 05 27 06 05 20 11 00 56 05 59 9.8 4.6 47 0736 2317 >90 SAT OCT 10 18 12 18 50 19 15 00 52 05 02 05 28 06 05 20 14 01 00 06 03 9.8 5.6 57 0838 2153 >90 SUN OCT 11 18 12 18 49 19 15 01 53 14 48 05 02 05 28 06 06 20 18 01 04 06 07 9.8 6.6 67 0934 1843 >90 MON OCT 12 18 11 18 48 19 14 02 54 15 35 05 03 05 28 06 06 20 21 01 08 06 12 9.8 7.7 78 1029 1423 >90 TUE OCT 13 18 10 18 48 19 13 03 57 16 20 05 03 05 29 06 06 20 24 01 12 06 16 9.8 8.7 88 1124 0907 >90 WED OCT 14 18 09 18 47 19 12 05 00 17 04 05 03 05 29 06 07 20 27 01 16 06 20 9.8 9.8 99 1218 0311 >90 THU OCT 15 18 08 18 46 19 12 06 03 17 47 05 04 05 29 06 07 20 31 01 20 06 24 9.9 9.9 100 1313-0302 >90 FRI OCT 16 18 08 18 46 19 11 18 31 05 04 05 29 06 07 20 34 01 24 06 28 9.9 9.9 100 1408-0907 >90 SAT OCT 17 18 07 18 45 19 10 19 18 05 04 05 30 06 08 20 37 01 28 06 32 9.9 9.8 98 1505-1440 >90 SUN OCT 18 18 06 18 44 19 10 20 07 05 04 05 30 06 08 20 41 01 31 06 36 9.9 8.9 90 1604-1917 >90 MON OCT 19 18 06 18 43 19 09 21 00 05 05 05 30 06 08 20 44 01 35 06 41 9.9 8.1 81 1704-2238 >90 TUE OCT 20 18 05 18 43 19 08 21 57 05 05 05 31 06 09 20 47 01 39 06 45 10.0 7.1 71 1805-2430 >90 WED OCT 21 18 04 18 42 19 08 22 55 05 05 05 31 06 09 20 50 01 43 06 49 10.0 6.2 61 1905-2452 >90 THU OCT 22 18 04 18 42 19 07 23 53 05 06 05 31 06 09 20 53 01 47 06 54 10.0 5.2 52 2003-2348 >90 FRI OCT 23 18 03 18 41 19 07 00 50 05 06 05 32 06 10 20 57 01 51 06 58 10.0 4.3 42 2058-2127 83 SAT OCT 24 18 02 18 40 19 06 01 44 05 06 05 32 06 10 21 00 01 55 07 02 10.0 3.4 33 2149-1815 71 SUN OCT 25 18 02 18 40 19 06 14 37 02 36 05 07 05 32 06 10 21 04 01 59 07 07 10.0 2.5 25 2238-1413 60 MON OCT 26 18 01 18 39 19 05 15 14 03 26 05 07 05 33 06 11 21 07 02 03 07 11 10.0 1.7 16 2324-0940 49 TUE OCT 27 18 00 18 39 19 05 15 49 04 15 05 07 05 33 06 11 21 11 02 07 07 15 10.0 0.9 8 0009-0447 38 WED OCT 28 18 00 18 38 19 04 16 22 05 03 05 08 05 33 06 12 21 14 02 11 07 20 10.1 0.1 0 0052 0014 27 THU OCT 29 17 59 18 38 19 04 16 54 05 51 05 08 05 34 06 12 21 18 02 15 07 24 10.1 0.0 0 0136 0514 17 FRI OCT 30 17 59 18 37 19 03 17 28 06 39 05 08 05 34 06 13 21 21 02 19 07 28 10.1 0.0 0 0221 1002 10 SAT OCT 31 17 58 18 37 19 03 18 02 05 09 05 35 06 13 21 25 02 23 07 33 10.1 0.0 0 0306 1428 12 ONE LINE REFERS TO EVENING DATE FULL MOON Oct 01 21:04 UT AND FOLLOWING MORNING. LAST QUARTER Oct 10 00:41 UT All dates and times are zone HST NEW MOON Oct 16 19:32 UT in upper table (except sid time). FIRST QUARTER Oct 23 13:21 UT FULL MOON Oct 31 14:50 UT