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 FRI JAN 01 18 05 18 45 19 12 20 28 05 39 06 06 06 46 01 11 06 27 12 34 11.3 1.7 15 0944 1835 46 SAT JAN 02 18 06 18 46 19 13 21 26 05 39 06 06 06 46 01 16 06 31 12 38 11.3 2.7 23 1038 1411 59 SUN JAN 03 18 06 18 47 19 14 22 24 05 39 06 06 06 47 01 21 06 35 12 42 11.3 3.6 31 1130 0901 72 MON JAN 04 18 07 18 47 19 14 23 22 05 40 06 07 06 47 01 25 06 39 12 47 11.3 4.6 40 1220 0320 85 TUE JAN 05 18 07 18 48 19 15 00 19 05 40 06 07 06 47 01 30 06 43 12 51 11.3 5.5 48 1312-0229 >90 WED JAN 06 18 08 18 48 19 15 01 18 05 40 06 07 06 47 01 34 06 47 12 55 11.3 6.5 57 1403-0816 >90 THU JAN 07 18 09 18 49 19 16 02 18 05 41 06 07 06 48 01 39 06 51 12 59 11.3 7.5 66 1457-1339 >90 FRI JAN 08 18 09 18 50 19 16 03 21 14 18 05 41 06 08 06 48 01 44 06 55 13 04 11.3 8.5 75 1552-1818 >90 SAT JAN 09 18 10 18 50 19 17 04 25 15 08 05 41 06 08 06 48 01 48 06 59 13 08 11.3 9.6 84 1651-2154 >90 SUN JAN 10 18 11 18 51 19 18 05 29 16 02 05 41 06 08 06 48 01 53 07 03 13 12 11.3 10.6 94 1752-2407 >90 MON JAN 11 18 11 18 51 19 18 06 30 17 02 05 42 06 08 06 48 01 57 07 07 13 16 11.3 11.3 100 1854-2447 >90 TUE JAN 12 18 12 18 52 19 19 18 03 05 42 06 09 06 49 02 02 07 11 13 21 11.3 11.3 100 1954-2354 >90 WED JAN 13 18 12 18 53 19 19 19 04 05 42 06 09 06 49 02 07 07 14 13 24 11.3 11.1 98 2052-2138 >90 THU JAN 14 18 13 18 53 19 20 20 04 05 42 06 09 06 49 02 11 07 18 13 28 11.3 10.1 89 2147-1814 >90 FRI JAN 15 18 14 18 54 19 20 21 00 05 42 06 09 06 49 02 15 07 22 13 32 11.3 9.2 81 2237-1402 >90 SAT JAN 16 18 14 18 54 19 21 21 53 05 42 06 09 06 49 02 19 07 26 13 36 11.3 8.3 73 2325-0920 >90 SUN JAN 17 18 15 18 55 19 22 22 44 05 42 06 09 06 49 02 24 07 30 13 40 11.2 7.4 66 0010-0421 >90 MON JAN 18 18 16 18 55 19 22 23 33 05 43 06 09 06 49 02 28 07 34 13 44 11.2 6.6 58 0054 0043 >90 TUE JAN 19 18 16 18 56 19 23 00 22 05 43 06 09 06 49 02 33 07 38 13 48 11.2 5.8 51 0139 0535 88 WED JAN 20 18 17 18 57 19 23 01 10 05 43 06 09 06 49 02 38 07 42 13 52 11.2 5.0 44 0222 1025 77 THU JAN 21 18 18 18 57 19 24 02 00 05 43 06 09 06 49 02 42 07 46 13 56 11.2 4.2 37 0307 1448 66 FRI JAN 22 18 18 18 58 19 24 02 52 05 43 06 09 06 49 02 47 07 50 14 00 11.2 3.3 29 0354 1839 55 SAT JAN 23 18 19 18 58 19 25 03 45 05 43 06 09 06 49 02 51 07 54 14 04 11.2 2.4 21 0444 2146 44 SUN JAN 24 18 19 18 59 19 25 14 36 04 39 05 43 06 09 06 49 02 56 07 58 14 08 11.2 1.5 13 0538 2355 33 MON JAN 25 18 20 18 59 19 26 15 26 05 34 05 43 06 09 06 48 03 00 08 02 14 12 11.2 0.6 5 0634 2455 21 TUE JAN 26 18 21 19 00 19 26 16 20 06 28 05 43 06 09 06 48 03 05 08 06 14 16 11.2 0.0 0 0731 2435 09 WED JAN 27 18 21 19 01 19 27 17 17 05 42 06 09 06 48 03 10 08 10 14 20 11.1 0.0 0 0829 2250 05 THU JAN 28 18 22 19 01 19 27 18 17 05 42 06 09 06 48 03 14 08 14 14 24 11.1 0.0 0 0926 1945 17 FRI JAN 29 18 22 19 02 19 28 19 18 05 42 06 08 06 48 03 19 08 18 14 27 11.1 0.3 2 1022 1530 30 SAT JAN 30 18 23 19 02 19 28 20 17 05 42 06 08 06 47 03 23 08 21 14 30 11.1 1.2 11 1115 1021 43 SUN JAN 31 18 24 19 03 19 29 21 16 05 42 06 08 06 47 03 28 08 25 14 34 11.1 2.2 20 1208 0438 56 ONE LINE REFERS TO EVENING DATE LAST QUARTER Jan 06 09:37 UT AND FOLLOWING MORNING. NEW MOON Jan 13 05:00 UT All dates and times are zone HST FIRST QUARTER Jan 20 21:01 UT in upper table (except sid time). FULL MOON Jan 28 19:15 UT