KECK OBSERVATORY CALENDAR FOR 2020 -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 2020 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 TUE SEP 01 18 47 19 25 19 52 18 35 06 44 04 52 05 18 05 57 17 50 22 26 03 45 9.9 0.0 0 2304-1150 33 WED SEP 02 18 46 19 24 19 51 19 11 04 52 05 19 05 57 17 53 22 30 03 50 9.9 0.0 0 2350-0706 33 THU SEP 03 18 45 19 23 19 50 19 46 04 53 05 19 05 57 17 56 22 34 03 54 9.9 0.4 3 0035-0210 37 FRI SEP 04 18 44 19 22 19 49 20 19 04 53 05 19 05 57 17 59 22 38 03 58 9.9 1.0 9 0119 0247 43 SAT SEP 05 18 43 19 21 19 48 20 52 04 53 05 19 05 57 18 02 22 42 04 02 10.0 1.5 15 0203 0735 50 SUN SEP 06 18 43 19 21 19 47 21 26 04 54 05 20 05 58 18 06 22 46 04 07 10.0 2.1 20 0247 1205 58 MON SEP 07 18 42 19 20 19 46 22 03 04 54 05 20 05 58 18 09 22 50 04 11 10.0 2.7 27 0334 1606 67 TUE SEP 08 18 41 19 19 19 45 22 42 04 54 05 20 05 58 18 12 22 54 04 15 10.0 3.4 33 0422 1927 77 WED SEP 09 18 40 19 18 19 44 23 26 04 54 05 20 05 58 18 15 22 58 04 19 10.0 4.1 41 0513 2157 86 THU SEP 10 18 39 19 17 19 43 00 15 04 55 05 21 05 59 18 18 23 02 04 24 10.1 5.0 49 0607 2332 >90 FRI SEP 11 18 38 19 16 19 42 01 09 14 21 04 55 05 21 05 59 18 21 23 06 04 27 10.1 5.9 58 0703 2351 >90 SAT SEP 12 18 37 19 15 19 41 02 07 15 15 04 55 05 21 05 59 18 24 23 10 04 31 10.1 6.9 67 0801 2251 >90 SUN SEP 13 18 36 19 14 19 40 03 08 16 08 04 56 05 21 05 59 18 27 23 13 04 35 10.1 7.9 78 0858 2028 >90 MON SEP 14 18 35 19 13 19 39 04 12 16 59 04 56 05 22 05 59 18 30 23 17 04 40 10.1 9.0 88 0956 1647 >90 TUE SEP 15 18 34 19 12 19 38 05 15 17 46 04 56 05 22 06 00 18 33 23 21 04 44 10.2 10.0 98 1052 1200 >90 WED SEP 16 18 33 19 11 19 37 06 18 18 31 04 56 05 22 06 00 18 35 23 25 04 48 10.2 10.2 100 1147 0625 >90 THU SEP 17 18 32 19 10 19 36 19 15 04 57 05 22 06 00 18 38 23 29 04 52 10.2 10.1 99 1241 0022 >90 FRI SEP 18 18 32 19 09 19 35 19 58 04 57 05 23 06 00 18 41 23 33 04 57 10.2 9.4 92 1336-0545 >90 SAT SEP 19 18 31 19 08 19 34 20 43 04 57 05 23 06 00 18 44 23 37 05 01 10.2 8.7 84 1431-1131 >90 SUN SEP 20 18 30 19 07 19 33 21 29 04 57 05 23 06 01 18 47 23 41 05 05 10.3 7.9 76 1527-1634 >90 MON SEP 21 18 29 19 06 19 32 22 19 04 58 05 23 06 01 18 50 23 45 05 09 10.3 7.1 68 1625-2036 >90 TUE SEP 22 18 28 19 05 19 31 23 11 04 58 05 23 06 01 18 53 23 49 05 13 10.3 6.2 60 1723-2321 >90 WED SEP 23 18 27 19 05 19 30 00 06 04 58 05 24 06 01 18 57 23 53 05 18 10.3 5.3 51 1827-2416 >90 THU SEP 24 18 26 19 04 19 29 01 03 04 58 05 24 06 01 19 00 23 57 05 22 10.3 4.4 42 1921-2436 81 FRI SEP 25 18 25 19 03 19 28 14 24 01 59 04 59 05 24 06 02 19 03 00 01 05 26 10.4 3.4 33 2017-2316 69 SAT SEP 26 18 24 19 02 19 27 15 13 02 54 04 59 05 24 06 02 19 06 00 05 05 30 10.4 2.5 24 2111-2043 59 SUN SEP 27 18 23 19 01 19 26 15 56 03 48 04 59 05 25 06 02 19 09 00 09 05 35 10.4 1.6 15 2202-1714 48 MON SEP 28 18 23 19 00 19 26 16 36 04 39 04 59 05 25 06 02 19 12 00 13 05 38 10.4 0.8 7 2250-1303 39 TUE SEP 29 18 22 18 59 19 25 17 12 05 29 05 00 05 25 06 03 19 15 00 17 05 42 10.4 0.0 0 2336-0824 30 WED SEP 30 18 21 18 58 19 24 17 47 06 18 05 00 05 25 06 03 19 18 00 20 05 46 10.4 0.0 0 0021-0328 23 ONE LINE REFERS TO EVENING DATE FULL MOON Sep 02 05:20 UT AND FOLLOWING MORNING. LAST QUARTER Sep 10 09:26 UT All dates and times are zone HST NEW MOON Sep 17 11:00 UT in upper table (except sid time). FIRST QUARTER Sep 24 01:53 UT