KECK OBSERVATORY CALENDAR FOR 2025 -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 2025 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 WED JAN 01 18 05 18 45 19 12 20 09 05 39 06 06 06 46 01 11 06 27 12 34 11.3 10.0 87 2104-2029 >90 THU JAN 02 18 06 18 46 19 13 21 09 05 39 06 06 06 46 01 16 06 31 12 38 11.3 9.0 78 2158-1520 >90 FRI JAN 03 18 06 18 47 19 14 22 08 05 39 06 06 06 47 01 21 06 35 12 42 11.3 8.0 70 2248-0921 >90 SAT JAN 04 18 07 18 47 19 14 23 06 05 40 06 07 06 47 01 25 06 39 12 47 11.3 7.0 61 2338-0252 >90 SUN JAN 05 18 07 18 48 19 15 00 03 05 40 06 07 06 47 01 30 06 43 12 51 11.3 6.1 53 0033 0319 >90 MON JAN 06 18 08 18 48 19 15 01 02 05 40 06 07 06 47 01 34 06 47 12 55 11.3 5.1 44 0118 1021 79 TUE JAN 07 18 09 18 49 19 16 02 03 05 41 06 07 06 48 01 39 06 51 12 59 11.3 4.1 35 0211 1627 66 WED JAN 08 18 09 18 50 19 16 03 06 05 41 06 08 06 48 01 44 06 55 13 04 11.3 3.0 26 0307 2141 53 THU JAN 09 18 10 18 50 19 17 04 12 05 41 06 08 06 48 01 48 06 59 13 08 11.3 1.9 17 0407 2539 40 FRI JAN 10 18 11 18 51 19 18 14 53 05 17 05 41 06 08 06 48 01 53 07 03 13 12 11.3 0.8 7 0510 2801 27 SAT JAN 11 18 11 18 51 19 18 15 52 06 18 05 42 06 08 06 48 01 57 07 07 13 16 11.3 0.0 0 0614 2833 15 SUN JAN 12 18 12 18 52 19 19 16 54 05 42 06 09 06 49 02 02 07 11 13 21 11.3 0.0 0 0716 2715 08 MON JAN 13 18 12 18 53 19 19 17 57 05 42 06 09 06 49 02 07 07 15 13 25 11.3 0.0 0 0816 2421 15 TUE JAN 14 18 13 18 53 19 20 18 57 05 42 06 09 06 49 02 11 07 19 13 29 11.3 0.1 0 0910 2011 26 WED JAN 15 18 14 18 54 19 20 19 54 05 42 06 09 06 49 02 16 07 22 13 32 11.3 1.0 8 1001 1510 38 THU JAN 16 18 14 18 54 19 21 20 47 05 42 06 09 06 49 02 20 07 26 13 36 11.3 1.9 16 1048 0937 50 FRI JAN 17 18 15 18 55 19 22 21 38 05 42 06 09 06 49 02 25 07 30 13 40 11.2 2.7 24 1132 0351 61 SAT JAN 18 18 16 18 55 19 22 22 26 05 43 06 09 06 49 02 28 07 34 13 44 11.2 3.5 31 1214-0157 72 SUN JAN 19 18 16 18 56 19 23 23 14 05 43 06 09 06 49 02 33 07 38 13 48 11.2 4.3 38 1256-0732 83 MON JAN 20 18 17 18 57 19 23 00 02 05 43 06 09 06 49 02 38 07 42 13 52 11.2 5.1 45 1340-1254 >90 TUE JAN 21 18 18 18 57 19 24 00 52 05 43 06 09 06 49 02 42 07 46 13 56 11.2 5.9 52 1425-1745 >90 WED JAN 22 18 18 18 58 19 24 01 44 05 43 06 09 06 49 02 47 07 50 14 00 11.2 6.8 60 1512-2157 >90 THU JAN 23 18 19 18 58 19 25 02 39 05 43 06 09 06 49 02 51 07 54 14 04 11.2 7.7 68 1602-2518 >90 FRI JAN 24 18 19 18 59 19 25 03 36 14 03 05 43 06 09 06 49 02 56 07 58 14 08 11.2 8.6 77 1656-2732 >90 SAT JAN 25 18 20 18 59 19 26 04 33 14 54 05 43 06 09 06 48 03 00 08 02 14 12 11.2 9.6 85 1753-2827 >90 SUN JAN 26 18 21 19 00 19 26 05 29 15 51 05 43 06 09 06 48 03 05 08 06 14 16 11.2 10.5 94 1851-2750 >90 MON JAN 27 18 21 19 01 19 27 06 22 16 52 05 42 06 09 06 48 03 10 08 10 14 20 11.1 11.1 100 1950-2538 >90 TUE JAN 28 18 22 19 01 19 27 17 55 05 42 06 09 06 48 03 14 08 14 14 24 11.1 11.1 100 2047-2156 >90 WED JAN 29 18 22 19 02 19 28 18 57 05 42 06 08 06 48 03 19 08 18 14 27 11.1 11.1 100 2142-1658 >90 THU JAN 30 18 23 19 02 19 28 19 58 05 42 06 08 06 47 03 23 08 22 14 31 11.1 10.2 91 2234-1101 >90 FRI JAN 31 18 24 19 03 19 29 20 58 05 42 06 08 06 47 03 28 08 26 14 35 11.1 9.2 82 2325-0428 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Jan 06 23:56 UT AND FOLLOWING MORNING. FULL MOON Jan 13 22:28 UT All dates and times are zone HST LAST QUARTER Jan 21 20:31 UT in upper table (except sid time). NEW MOON Jan 29 12:35 UT