KECK OBSERVATORY CALENDAR FOR 2041 -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 2041 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 MON APR 01 18 46 19 24 19 50 19 50 05 02 05 28 06 06 08 12 12 23 17 25 9.2 9.2 100 0157 1013 >90 TUE APR 02 18 46 19 24 19 50 20 50 05 01 05 27 06 05 08 16 12 27 17 28 9.2 8.2 89 0249 1551 >90 WED APR 03 18 47 19 24 19 51 21 51 05 00 05 26 06 04 08 21 12 30 17 31 9.1 7.1 78 0342 2031 >90 THU APR 04 18 47 19 25 19 51 22 51 04 59 05 25 06 03 08 25 12 34 17 34 9.1 6.1 67 0436 2402 >90 FRI APR 05 18 47 19 25 19 51 23 49 04 58 05 24 06 02 08 29 12 38 17 37 9.1 5.1 56 0532 2613 >90 SAT APR 06 18 47 19 25 19 52 00 44 04 57 05 23 06 01 08 34 12 42 17 40 9.1 4.2 46 0628 2659 84 SUN APR 07 18 48 19 26 19 52 01 35 04 56 05 22 06 00 08 38 12 46 17 43 9.1 3.4 36 0722 2628 74 MON APR 08 18 48 19 26 19 52 02 21 04 55 05 21 06 00 08 42 12 50 17 46 9.0 2.6 28 0815 2441 63 TUE APR 09 18 48 19 26 19 53 03 03 04 54 05 20 05 59 08 46 12 54 17 49 9.0 1.9 20 0905 2148 53 WED APR 10 18 48 19 27 19 53 03 40 04 53 05 20 05 58 08 50 12 58 17 52 9.0 1.2 13 0953 1759 44 THU APR 11 18 49 19 27 19 53 14 51 04 15 04 52 05 19 05 57 08 54 13 02 17 55 9.0 0.6 6 1039 1325 35 FRI APR 12 18 49 19 27 19 54 15 41 04 48 04 51 05 18 05 56 08 59 13 06 17 58 9.0 0.0 0 1124 0816 27 SAT APR 13 18 49 19 28 19 54 16 30 05 20 04 50 05 17 05 55 09 03 13 10 18 01 8.9 0.0 0 1208 0243 23 SUN APR 14 18 50 19 28 19 55 17 20 05 53 04 50 05 16 05 55 09 08 13 14 18 05 8.9 0.0 0 1253-0302 23 MON APR 15 18 50 19 29 19 55 18 10 06 27 04 49 05 15 05 54 09 12 13 18 18 08 8.9 0.0 0 1339-0848 29 TUE APR 16 18 50 19 29 19 56 19 03 04 48 05 14 05 53 09 17 13 22 18 11 8.9 0.0 0 1426-1418 38 WED APR 17 18 51 19 29 19 56 19 59 04 47 05 14 05 52 09 21 13 26 18 13 8.9 0.1 0 1517-1917 48 THU APR 18 18 51 19 30 19 56 20 57 04 46 05 13 05 51 09 25 13 30 18 16 8.8 1.0 11 1612-2323 59 FRI APR 19 18 51 19 30 19 57 21 58 04 45 05 12 05 51 09 30 13 34 18 19 8.8 2.0 22 1710-2618 70 SAT APR 20 18 52 19 30 19 57 23 00 04 44 05 11 05 50 09 34 13 37 18 22 8.8 3.0 34 1811-2738 82 SUN APR 21 18 52 19 31 19 58 00 00 04 43 05 10 05 49 09 39 13 41 18 25 8.7 4.0 46 1914-2725 >90 MON APR 22 18 52 19 31 19 58 00 57 04 42 05 09 05 49 09 43 13 45 18 28 8.7 5.0 57 2015-2526 >90 TUE APR 23 18 53 19 32 19 59 01 48 04 42 05 09 05 48 09 48 13 49 18 32 8.7 5.8 66 2115-2155 >90 WED APR 24 18 53 19 32 19 59 02 35 04 41 05 08 05 47 09 52 13 53 18 35 8.7 6.6 75 2211-1707 >90 THU APR 25 18 53 19 32 20 00 03 18 14 35 04 40 05 07 05 46 09 57 13 57 18 38 8.7 7.3 84 2305-1124 >90 FRI APR 26 18 54 19 33 20 00 03 57 15 35 04 39 05 06 05 46 10 00 14 01 18 41 8.7 8.0 91 2357-0506 >90 SAT APR 27 18 54 19 33 20 01 04 36 16 35 04 38 05 06 05 45 10 05 14 05 18 44 8.6 8.6 99 0047 0124 >90 SUN APR 28 18 54 19 34 20 01 05 15 17 34 04 37 05 05 05 44 10 09 14 09 18 47 8.6 8.6 100 0138 0745 >90 MON APR 29 18 55 19 34 20 02 05 55 18 33 04 37 05 04 05 44 10 14 14 13 18 51 8.6 8.6 100 0229 1337 >90 TUE APR 30 18 55 19 35 20 02 06 38 19 33 04 36 05 03 05 43 10 18 14 17 18 54 8.6 8.6 100 0321 1842 >90 ONE LINE REFERS TO EVENING DATE NEW MOON Apr 01 01:30 UT AND FOLLOWING MORNING. FIRST QUARTER Apr 08 09:38 UT All dates and times are zone HST FULL MOON Apr 16 12:02 UT in upper table (except sid time). LAST QUARTER Apr 23 17:24 UT NEW MOON Apr 30 11:48 UT