KECK OBSERVATORY CALENDAR FOR 2000 -ASTRONOMICAL (computed for altitude 4145.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) RA DEC 2000 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight SAT APR 01 18 46 19 24 19 50 04 56 16 23 05 01 05 27 06 05 08 12 12 22 17 24 9.2 9.1 99 2309-0911 SUN APR 02 18 46 19 24 19 50 05 37 17 17 05 00 05 26 06 04 08 16 12 26 17 27 9.2 9.2 100 2359-0438 MON APR 03 18 47 19 25 19 51 06 18 18 13 04 59 05 25 06 03 08 21 12 30 17 30 9.1 9.1 100 0050+0015 TUE APR 04 18 47 19 25 19 51 07 00 19 09 04 58 05 24 06 02 08 24 12 34 17 33 9.1 9.1 100 0142+0514 WED APR 05 18 47 19 25 19 52 07 44 20 08 04 57 05 23 06 01 08 29 12 38 17 36 9.1 8.8 97 0235+1002 THU APR 06 18 48 19 26 19 52 21 08 04 56 05 22 06 00 08 33 12 42 17 39 9.1 7.8 86 0331+1419 FRI APR 07 18 48 19 26 19 52 22 10 04 55 05 21 06 00 08 37 12 46 17 42 9.0 6.8 74 0429+1748 SAT APR 08 18 48 19 26 19 53 23 13 04 54 05 20 05 59 08 42 12 50 17 45 9.0 5.7 63 0528+2011 SUN APR 09 18 48 19 27 19 53 00 14 04 53 05 20 05 58 08 46 12 54 17 48 9.0 4.6 51 0629+2117 MON APR 10 18 49 19 27 19 53 01 13 04 52 05 19 05 57 08 50 12 58 17 51 9.0 3.7 40 0730+2101 TUE APR 11 18 49 19 27 19 54 02 08 04 51 05 18 05 56 08 55 13 02 17 54 9.0 2.7 30 0830+1926 WED APR 12 18 49 19 28 19 54 02 59 04 50 05 17 05 55 08 59 13 06 17 57 8.9 1.9 20 0927+1642 THU APR 13 18 50 19 28 19 55 03 45 04 50 05 16 05 55 09 04 13 10 18 00 8.9 1.1 12 1022+1304 FRI APR 14 18 50 19 28 19 55 04 28 04 49 05 15 05 54 09 08 13 14 18 03 8.9 0.3 3 1115+0847 SAT APR 15 18 50 19 29 19 56 16 11 05 09 04 48 05 14 05 53 09 13 13 18 18 06 8.9 0.0 0 1205+0407 SUN APR 16 18 51 19 29 19 56 17 06 05 48 04 47 05 14 05 52 09 17 13 21 18 09 8.9 0.0 0 1254-0040 MON APR 17 18 51 19 30 19 56 17 59 06 27 04 46 05 13 05 51 09 21 13 25 18 12 8.8 0.0 0 1343-0521 TUE APR 18 18 51 19 30 19 57 18 52 07 06 04 45 05 12 05 51 09 26 13 29 18 15 8.8 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 30 13 33 18 18 8.8 0.0 0 1520-1336 THU APR 20 18 52 19 31 19 58 20 36 04 43 05 10 05 49 09 35 13 37 18 21 8.7 0.6 7 1609-1649 FRI APR 21 18 52 19 31 19 58 21 28 04 42 05 09 05 48 09 39 13 41 18 24 8.7 1.5 17 1659-1916 SAT APR 22 18 52 19 32 19 59 22 19 04 42 05 09 05 48 09 43 13 45 18 28 8.7 2.3 26 1749-2050 SUN APR 23 18 53 19 32 19 59 23 08 04 41 05 08 05 47 09 47 13 49 18 31 8.7 3.1 36 1840-2127 MON APR 24 18 53 19 32 20 00 23 56 04 40 05 07 05 46 09 52 13 53 18 34 8.7 3.9 45 1931-2108 TUE APR 25 18 53 19 33 20 00 00 43 04 39 05 06 05 46 09 56 13 57 18 37 8.7 4.7 54 2022-1951 WED APR 26 18 54 19 33 20 01 01 27 04 38 05 06 05 45 10 01 14 01 18 40 8.6 5.4 63 2112-1741 THU APR 27 18 54 19 34 20 01 02 09 04 37 05 05 05 44 10 05 14 05 18 43 8.6 6.1 71 2201-1441 FRI APR 28 18 55 19 34 20 02 02 50 04 37 05 04 05 44 10 10 14 09 18 47 8.6 6.8 79 2250-1057 SAT APR 29 18 55 19 35 20 02 03 30 04 36 05 03 05 43 10 14 14 13 18 49 8.6 7.5 87 2340-0637 SUN APR 30 18 55 19 35 20 03 04 10 04 35 05 03 05 42 10 19 14 17 18 52 8.5 8.1 95 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