KECK OBSERVATORY CALENDAR FOR 2000 -NAUTICAL (computed for altitude 4145.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) RA DEC 2000 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight SAT APR 01 18 46 19 24 19 50 04 56 16 23 05 01 05 27 06 05 07 46 12 22 17 50 10.1 9.5 94 2309-0911 SUN APR 02 18 46 19 24 19 50 05 37 17 17 05 00 05 26 06 04 07 50 12 26 17 53 10.0 10.0 100 2359-0438 MON APR 03 18 47 19 25 19 51 06 18 18 13 04 59 05 25 06 03 07 54 12 30 17 56 10.0 10.0 100 0050+0015 TUE APR 04 18 47 19 25 19 51 07 00 19 09 04 58 05 24 06 02 07 58 12 34 17 59 10.0 10.0 100 0142+0514 WED APR 05 18 47 19 25 19 52 07 44 20 08 04 57 05 23 06 01 08 02 12 38 18 02 10.0 9.2 92 0235+1002 THU APR 06 18 48 19 26 19 52 21 08 04 56 05 22 06 00 08 07 12 42 18 05 9.9 8.2 82 0331+1419 FRI APR 07 18 48 19 26 19 52 22 10 04 55 05 21 06 00 08 11 12 46 18 08 9.9 7.2 72 0429+1748 SAT APR 08 18 48 19 26 19 53 23 13 04 54 05 20 05 59 08 15 12 50 18 11 9.9 6.1 61 0528+2011 SUN APR 09 18 48 19 27 19 53 00 14 04 53 05 20 05 58 08 20 12 54 18 15 9.9 5.1 51 0629+2117 MON APR 10 18 49 19 27 19 53 01 13 04 52 05 19 05 57 08 24 12 58 18 18 9.9 4.1 41 0730+2101 TUE APR 11 18 49 19 27 19 54 02 08 04 51 05 18 05 56 08 28 13 02 18 21 9.8 3.2 32 0830+1926 WED APR 12 18 49 19 28 19 54 02 59 04 50 05 17 05 55 08 33 13 06 18 24 9.8 2.3 23 0927+1642 THU APR 13 18 50 19 28 19 55 03 45 04 50 05 16 05 55 08 37 13 10 18 27 9.8 1.5 15 1022+1304 FRI APR 14 18 50 19 28 19 55 04 28 04 49 05 15 05 54 08 41 13 14 18 29 9.8 0.8 8 1115+0847 SAT APR 15 18 50 19 29 19 56 16 11 05 09 04 48 05 14 05 53 08 46 13 18 18 32 9.7 0.1 0 1205+0407 SUN APR 16 18 51 19 29 19 56 17 06 05 48 04 47 05 14 05 52 08 50 13 21 18 36 9.7 0.0 0 1254-0040 MON APR 17 18 51 19 30 19 56 17 59 06 27 04 46 05 13 05 51 08 55 13 25 18 39 9.7 0.0 0 1343-0521 TUE APR 18 18 51 19 30 19 57 18 52 07 06 04 45 05 12 05 51 08 59 13 29 18 42 9.7 0.0 0 1431-0943 WED APR 19 18 51 19 30 19 57 19 44 07 47 04 44 05 11 05 50 09 03 13 33 18 45 9.7 0.2 2 1520-1336 THU APR 20 18 52 19 31 19 58 20 36 04 43 05 10 05 49 09 08 13 37 18 48 9.7 1.1 11 1609-1649 FRI APR 21 18 52 19 31 19 58 21 28 04 42 05 09 05 48 09 11 13 41 18 51 9.6 2.0 20 1659-1916 SAT APR 22 18 52 19 32 19 59 22 19 04 42 05 09 05 48 09 16 13 45 18 55 9.6 2.8 28 1749-2050 SUN APR 23 18 53 19 32 19 59 23 08 04 41 05 08 05 47 09 20 13 49 18 58 9.6 3.6 37 1840-2127 MON APR 24 18 53 19 32 20 00 23 56 04 40 05 07 05 46 09 24 13 53 19 01 9.6 4.4 45 1931-2108 TUE APR 25 18 53 19 33 20 00 00 43 04 39 05 06 05 46 09 29 13 57 19 04 9.6 5.2 54 2022-1951 WED APR 26 18 54 19 33 20 01 01 27 04 38 05 06 05 45 09 33 14 01 19 08 9.6 5.9 61 2112-1741 THU APR 27 18 54 19 34 20 01 02 09 04 37 05 05 05 44 09 38 14 05 19 11 9.5 6.6 69 2201-1441 FRI APR 28 18 55 19 34 20 02 02 50 04 37 05 04 05 44 09 42 14 09 19 14 9.5 7.3 76 2250-1057 SAT APR 29 18 55 19 35 20 02 03 30 04 36 05 03 05 43 09 47 14 13 19 17 9.5 7.9 83 2340-0637 SUN APR 30 18 55 19 35 20 03 04 10 04 35 05 03 05 42 09 51 14 17 19 21 9.5 8.6 90 0030-0149 ONE LINE REFERS TO EVENING DATE NEW MOON APR 04 18:14 UT AND FOLLOWING MORNING. FIRST QUARTER APR 11 13:33 UT All dates and times are zone HST FULL MOON APR 18 17:45 UT in upper table (except sid time). LAST QUARTER APR 26 19:32 UT