KECK OBSERVATORY CALENDAR FOR 2026 -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 2026 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 WED JUL 01 19 16 19 58 20 29 20 35 04 23 04 53 05 35 14 48 18 20 22 44 7.9 0.1 1 2043-2101 54 THU JUL 02 19 16 19 59 20 29 21 14 04 23 04 53 05 36 14 52 18 24 22 48 7.9 0.8 9 2131-1626 59 FRI JUL 03 19 16 19 59 20 29 21 50 04 24 04 54 05 36 14 56 18 28 22 53 7.9 1.4 17 2218-1110 65 SAT JUL 04 19 16 19 59 20 29 22 24 04 24 04 54 05 36 15 00 18 32 22 56 7.9 1.9 24 2304-0524 71 SUN JUL 05 19 16 19 59 20 28 22 58 04 24 04 54 05 37 15 03 18 36 23 00 7.9 2.5 31 2349 0039 79 MON JUL 06 19 16 19 58 20 28 23 33 04 25 04 55 05 37 15 07 18 40 23 05 7.9 3.1 38 0036 0644 87 TUE JUL 07 19 16 19 58 20 28 00 10 04 25 04 55 05 37 15 11 18 44 23 09 7.9 3.7 46 0126 1246 >90 WED JUL 08 19 16 19 58 20 28 00 51 04 26 04 56 05 38 15 15 18 48 23 14 8.0 4.4 55 0219 1813 >90 THU JUL 09 19 16 19 58 20 28 01 39 14 43 04 26 04 56 05 38 15 19 18 51 23 18 8.0 5.2 65 0317 2245 >90 FRI JUL 10 19 16 19 58 20 28 02 35 15 50 04 27 04 56 05 39 15 23 18 55 23 23 8.0 6.1 76 0419 2556 >90 SAT JUL 11 19 16 19 58 20 28 03 39 17 00 04 27 04 57 05 39 15 27 18 59 23 27 8.0 7.2 89 0525 2719 >90 SUN JUL 12 19 16 19 58 20 27 04 48 18 07 04 28 04 57 05 39 15 30 19 03 23 32 8.0 8.0 100 0632 2642 >90 MON JUL 13 19 16 19 58 20 27 05 58 19 08 04 28 04 58 05 40 15 34 19 07 23 36 8.0 8.0 100 0737 2408 >90 TUE JUL 14 19 15 19 57 20 27 20 02 04 29 04 58 05 40 15 38 19 11 23 41 8.0 8.0 100 0838 1955 >90 WED JUL 15 19 15 19 57 20 27 20 48 04 29 04 59 05 40 15 42 19 15 23 45 8.0 7.7 95 0935 1433 >90 THU JUL 16 19 15 19 57 20 26 21 29 04 30 04 59 05 41 15 44 19 19 23 50 8.1 7.0 86 1027 0831 >90 FRI JUL 17 19 15 19 57 20 26 22 06 04 30 05 00 05 41 15 48 19 23 23 54 8.1 6.4 79 1116 0214 >90 SAT JUL 18 19 15 19 56 20 26 22 41 04 31 05 00 05 42 15 52 19 27 23 59 8.1 5.8 72 1202-0359 >90 SUN JUL 19 19 14 19 56 20 25 23 15 04 31 05 00 05 42 15 55 19 31 00 03 8.1 5.3 65 1248-0952 >90 MON JUL 20 19 14 19 56 20 25 23 51 04 32 05 01 05 42 15 59 19 35 00 08 8.1 4.7 57 1334-1515 >90 TUE JUL 21 19 14 19 55 20 24 00 28 04 32 05 01 05 43 16 02 19 39 00 12 8.1 4.1 49 1423-1951 87 WED JUL 22 19 14 19 55 20 24 01 08 04 33 05 02 05 43 16 06 19 43 00 16 8.2 3.4 41 1511-2345 79 THU JUL 23 19 13 19 55 20 24 14 28 01 52 04 33 05 02 05 44 16 10 19 47 00 20 8.2 2.7 32 1602-2639 72 FRI JUL 24 19 13 19 54 20 23 15 21 02 40 04 34 05 03 05 44 16 13 19 51 00 25 8.2 1.9 23 1655-2819 64 SAT JUL 25 19 13 19 54 20 23 16 14 03 31 04 34 05 03 05 44 16 17 19 55 00 29 8.2 1.0 12 1750-2842 57 SUN JUL 26 19 12 19 53 20 22 17 04 04 24 04 35 05 04 05 45 16 20 19 58 00 34 8.2 0.2 2 1844-2745 51 MON JUL 27 19 12 19 53 20 21 17 51 05 19 04 35 05 04 05 45 16 23 20 02 00 38 8.2 0.0 0 1937-2530 46 TUE JUL 28 19 11 19 52 20 21 18 35 06 13 04 36 05 05 05 46 16 27 20 06 00 43 8.2 0.0 0 2029-2204 42 WED JUL 29 19 11 19 52 20 20 19 14 04 37 05 05 05 46 16 30 20 10 00 48 8.3 0.0 0 2118-1739 41 THU JUL 30 19 10 19 51 20 20 19 51 04 37 05 06 05 46 16 34 20 14 00 52 8.3 0.0 0 2206-1228 42 FRI JUL 31 19 10 19 51 20 19 20 26 04 38 05 06 05 47 16 37 20 18 00 57 8.3 0.1 1 2252-0642 46 ONE LINE REFERS TO EVENING DATE LAST QUARTER Jul 07 19:30 UT AND FOLLOWING MORNING. NEW MOON Jul 14 09:44 UT All dates and times are zone HST FIRST QUARTER Jul 21 11:06 UT in upper table (except sid time). FULL MOON Jul 29 14:37 UT