KECK OBSERVATORY CALENDAR FOR 2025 -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 2025 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 SUN JUN 01 19 08 19 50 20 20 00 30 04 19 04 49 05 31 12 42 16 23 20 42 8.0 3.8 47 1022 1124 86 MON JUN 02 19 08 19 51 20 20 01 03 04 19 04 49 05 31 12 46 16 27 20 46 8.0 3.3 40 1106 0548 79 TUE JUN 03 19 09 19 51 20 21 01 34 04 19 04 49 05 31 12 51 16 30 20 50 8.0 2.8 34 1149 0003 71 WED JUN 04 19 09 19 51 20 21 02 05 04 19 04 49 05 31 12 55 16 34 20 54 8.0 2.2 28 1232-0540 65 THU JUN 05 19 10 19 52 20 22 14 26 02 36 04 19 04 49 05 31 13 00 16 38 20 58 7.9 1.7 21 1315-1111 59 FRI JUN 06 19 10 19 52 20 22 15 15 03 10 04 19 04 49 05 31 13 04 16 42 21 02 7.9 1.1 14 1359-1619 54 SAT JUN 07 19 10 19 53 20 23 16 05 03 47 04 19 04 49 05 31 13 09 16 46 21 06 7.9 0.5 6 1446-2053 50 SUN JUN 08 19 11 19 53 20 23 16 57 04 27 04 19 04 49 05 31 13 13 16 50 21 10 7.9 0.0 0 1535-2439 48 MON JUN 09 19 11 19 53 20 23 17 51 05 13 04 19 04 49 05 31 13 17 16 54 21 14 7.9 0.0 0 1628-2724 48 TUE JUN 10 19 11 19 54 20 24 18 46 06 04 04 19 04 49 05 31 13 21 16 58 21 18 7.9 0.0 0 1723-2854 49 WED JUN 11 19 12 19 54 20 24 19 41 06 58 04 19 04 49 05 31 13 25 17 02 21 22 7.9 0.0 0 1820-2859 52 THU JUN 12 19 12 19 55 20 25 20 33 04 19 04 49 05 31 13 30 17 06 21 26 7.9 0.1 1 1917-2734 57 FRI JUN 13 19 12 19 55 20 25 21 22 04 19 04 49 05 31 13 34 17 10 21 30 7.9 1.0 12 2013-2445 63 SAT JUN 14 19 13 19 55 20 25 22 06 04 19 04 49 05 31 13 38 17 14 21 34 7.9 1.7 21 2106-2041 70 SUN JUN 15 19 13 19 56 20 26 22 47 04 19 04 49 05 32 13 43 17 18 21 37 7.9 2.4 29 2157-1532 77 MON JUN 16 19 13 19 56 20 26 23 25 04 19 04 49 05 32 13 47 17 22 21 41 7.9 3.0 37 2247-0938 85 TUE JUN 17 19 13 19 56 20 26 00 01 04 19 04 49 05 32 13 51 17 26 21 45 7.9 3.6 45 2336-0319 >90 WED JUN 18 19 14 19 56 20 27 00 38 04 19 04 49 05 32 13 56 17 30 21 49 7.9 4.2 53 0025 0318 >90 THU JUN 19 19 14 19 57 20 27 01 16 04 19 04 50 05 32 14 00 17 34 21 53 7.9 4.8 61 0115 0949 >90 FRI JUN 20 19 14 19 57 20 27 01 57 14 38 04 20 04 50 05 32 14 04 17 38 21 58 7.9 5.5 69 0209 1555 >90 SAT JUN 21 19 14 19 57 20 27 02 44 15 43 04 20 04 50 05 33 14 08 17 41 22 02 7.9 6.3 79 0306 2109 >90 SUN JUN 22 19 15 19 57 20 28 03 38 16 50 04 20 04 50 05 33 14 13 17 45 22 06 7.9 7.2 91 0407 2504 >90 MON JUN 23 19 15 19 58 20 28 04 38 18 00 04 20 04 50 05 33 14 17 17 49 22 10 7.9 7.9 100 0512 2717 >90 TUE JUN 24 19 15 19 58 20 28 05 43 19 07 04 21 04 51 05 33 14 21 17 53 22 15 7.9 7.9 100 0617 2735 >90 WED JUN 25 19 15 19 58 20 28 06 50 20 08 04 21 04 51 05 34 14 25 17 57 22 19 7.9 7.9 100 0720 2600 >90 THU JUN 26 19 15 19 58 20 28 21 01 04 21 04 51 05 34 14 29 18 01 22 23 7.9 7.3 93 0820 2247 >90 FRI JUN 27 19 16 19 58 20 28 21 46 04 21 04 52 05 34 14 33 18 05 22 27 7.9 6.6 83 0914 1822 >90 SAT JUN 28 19 16 19 58 20 28 22 26 04 22 04 52 05 35 14 36 18 09 22 32 7.9 5.9 75 1004 1310 >90 SUN JUN 29 19 16 19 58 20 28 23 01 04 22 04 52 05 35 14 40 18 13 22 36 7.9 5.4 67 1051 0731 >90 MON JUN 30 19 16 19 58 20 29 23 33 04 22 04 53 05 35 14 45 18 17 22 40 7.9 4.8 61 1135 0142 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Jun 03 03:42 UT AND FOLLOWING MORNING. FULL MOON Jun 11 07:47 UT All dates and times are zone HST LAST QUARTER Jun 18 19:20 UT in upper table (except sid time). NEW MOON Jun 25 10:32 UT