KECK OBSERVATORY CALENDAR FOR 2021 -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 2021 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 TUE JUN 01 19 08 19 50 20 20 00 52 04 19 04 49 05 31 12 42 16 22 20 42 8.0 4.5 56 2310-1142 >90 WED JUN 02 19 08 19 51 20 20 01 28 04 19 04 49 05 31 12 46 16 26 20 46 8.0 5.1 64 2356-0636 >90 THU JUN 03 19 09 19 51 20 21 02 01 04 19 04 49 05 31 12 51 16 30 20 50 8.0 5.7 71 0040-0124 >90 FRI JUN 04 19 09 19 51 20 21 02 34 14 44 04 19 04 49 05 31 12 55 16 34 20 54 8.0 6.2 78 0123 0344 >90 SAT JUN 05 19 10 19 52 20 22 03 07 15 32 04 19 04 49 05 31 13 00 16 38 20 58 7.9 6.7 84 0207 0840 >90 SUN JUN 06 19 10 19 52 20 22 03 41 16 21 04 19 04 49 05 31 13 04 16 42 21 02 7.9 7.3 92 0250 1313 >90 MON JUN 07 19 10 19 53 20 23 04 18 17 11 04 19 04 49 05 31 13 09 16 46 21 06 7.9 7.9 99 0336 1716 >90 TUE JUN 08 19 11 19 53 20 23 04 58 18 03 04 19 04 49 05 31 13 12 16 50 21 10 7.9 7.9 100 0423 2038 >90 WED JUN 09 19 11 19 53 20 23 05 42 18 55 04 19 04 49 05 31 13 16 16 54 21 14 7.9 7.9 100 0513 2309 >90 THU JUN 10 19 11 19 54 20 24 06 30 19 49 04 19 04 49 05 31 13 21 16 58 21 18 7.9 7.9 100 0605 2439 >90 FRI JUN 11 19 12 19 54 20 24 20 41 04 19 04 49 05 31 13 25 17 02 21 22 7.9 7.6 96 0657 2459 >90 SAT JUN 12 19 12 19 55 20 25 21 31 04 19 04 49 05 31 13 30 17 06 21 26 7.9 6.8 86 0751 2407 >90 SUN JUN 13 19 12 19 55 20 25 22 19 04 19 04 49 05 31 13 34 17 10 21 29 7.9 6.0 75 0844 2202 >90 MON JUN 14 19 13 19 55 20 25 23 03 04 19 04 49 05 31 13 38 17 14 21 33 7.9 5.3 66 0936 1850 >90 TUE JUN 15 19 13 19 56 20 26 23 44 04 19 04 49 05 32 13 43 17 18 21 37 7.9 4.6 58 1027 1438 >90 WED JUN 16 19 13 19 56 20 26 00 23 04 19 04 49 05 32 13 47 17 22 21 41 7.9 3.9 49 1118 0932 88 THU JUN 17 19 13 19 56 20 26 01 02 04 19 04 49 05 32 13 51 17 26 21 45 7.9 3.3 41 1207 0358 79 FRI JUN 18 19 14 19 56 20 27 01 40 04 19 04 49 05 32 13 56 17 29 21 49 7.9 2.6 33 1257-0202 70 SAT JUN 19 19 14 19 57 20 27 02 21 04 19 04 50 05 32 14 00 17 33 21 53 7.9 2.0 25 1349-0810 62 SUN JUN 20 19 14 19 57 20 27 14 57 03 04 04 20 04 50 05 32 14 04 17 37 21 58 7.9 1.3 16 1444-1402 54 MON JUN 21 19 14 19 57 20 27 16 00 03 53 04 20 04 50 05 33 14 08 17 41 22 02 7.9 0.5 5 1543-1913 49 TUE JUN 22 19 15 19 57 20 28 17 07 04 48 04 20 04 50 05 33 14 13 17 45 22 06 7.9 0.0 0 1646-2315 45 WED JUN 23 19 15 19 58 20 28 18 15 05 48 04 20 04 50 05 33 14 17 17 49 22 10 7.9 0.0 0 1752-2542 46 THU JUN 24 19 15 19 58 20 28 19 21 06 52 04 21 04 51 05 33 14 21 17 53 22 15 7.9 0.0 0 1858-2618 49 FRI JUN 25 19 15 19 58 20 28 20 23 04 21 04 51 05 34 14 25 17 57 22 19 7.9 0.0 0 2004-2503 54 SAT JUN 26 19 15 19 58 20 28 21 18 04 21 04 51 05 34 14 28 18 01 22 23 7.9 0.8 10 2105-2214 62 SUN JUN 27 19 16 19 58 20 28 22 06 04 21 04 52 05 34 14 32 18 05 22 27 7.9 1.6 20 2202-1814 69 MON JUN 28 19 16 19 58 20 28 22 48 04 22 04 52 05 34 14 36 18 09 22 32 7.9 2.3 29 2253-1325 78 TUE JUN 29 19 16 19 58 20 29 23 26 04 22 04 52 05 35 14 41 18 13 22 36 7.9 2.9 37 2341-0811 86 WED JUN 30 19 16 19 58 20 29 00 01 04 22 04 53 05 35 14 45 18 17 22 40 7.9 3.5 44 0028-0255 >90 ONE LINE REFERS TO EVENING DATE LAST QUARTER Jun 02 07:25 UT AND FOLLOWING MORNING. NEW MOON Jun 10 10:54 UT All dates and times are zone HST FIRST QUARTER Jun 18 03:54 UT in upper table (except sid time). FULL MOON Jun 24 18:40 UT