KECK OBSERVATORY CALENDAR FOR 2005 -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 2005 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight FRI APR 01 18 46 19 24 19 50 01 36 05 02 05 28 06 05 08 11 12 22 17 24 9.2 5.8 62 1925-2718 SAT APR 02 18 46 19 24 19 50 02 31 05 01 05 27 06 05 08 15 12 25 17 27 9.2 6.7 72 2027-2427 SUN APR 03 18 46 19 24 19 50 03 20 05 00 05 26 06 04 08 19 12 29 17 30 9.2 7.5 81 2126-2006 MON APR 04 18 47 19 25 19 51 04 04 04 59 05 25 06 03 08 24 12 33 17 33 9.1 8.2 89 2221-1436 TUE APR 05 18 47 19 25 19 51 04 44 16 11 04 58 05 24 06 02 08 28 12 37 17 36 9.1 8.9 97 2314-0820 WED APR 06 18 47 19 25 19 52 05 21 17 10 04 57 05 23 06 01 08 33 12 41 17 39 9.1 9.1 100 0004-0143 THU APR 07 18 48 19 26 19 52 05 58 18 07 04 56 05 22 06 00 08 36 12 45 17 42 9.1 9.1 100 0053+0452 FRI APR 08 18 48 19 26 19 52 06 35 19 04 04 55 05 21 06 00 08 40 12 49 17 45 9.0 9.0 100 0142+1108 SAT APR 09 18 48 19 26 19 53 07 13 20 01 04 54 05 20 05 59 08 45 12 53 17 48 9.0 8.9 98 0232+1646 SUN APR 10 18 48 19 27 19 53 07 55 20 59 04 53 05 20 05 58 08 49 12 57 17 51 9.0 7.9 87 0324+2129 MON APR 11 18 49 19 27 19 53 21 57 04 52 05 19 05 57 08 53 13 01 17 54 9.0 6.9 76 0417+2505 TUE APR 12 18 49 19 27 19 54 22 54 04 51 05 18 05 56 08 58 13 05 17 57 9.0 6.0 66 0511+2724 WED APR 13 18 49 19 28 19 54 23 49 04 50 05 17 05 55 09 02 13 09 18 00 8.9 5.0 56 0606+2820 THU APR 14 18 50 19 28 19 55 00 41 04 50 05 16 05 55 09 07 13 13 18 04 8.9 4.2 46 0700+2755 FRI APR 15 18 50 19 28 19 55 01 28 04 49 05 15 05 54 09 11 13 17 18 07 8.9 3.3 37 0753+2613 SAT APR 16 18 50 19 29 19 56 02 11 04 48 05 14 05 53 09 16 13 21 18 09 8.9 2.6 29 0844+2322 SUN APR 17 18 51 19 29 19 56 02 49 04 47 05 14 05 52 09 20 13 25 18 12 8.9 2.0 22 0932+1932 MON APR 18 18 51 19 30 19 56 03 25 04 46 05 13 05 51 09 24 13 29 18 15 8.8 1.3 15 1019+1452 TUE APR 19 18 51 19 30 19 57 03 59 04 45 05 12 05 51 09 29 13 32 18 18 8.8 0.8 8 1104+0933 WED APR 20 18 51 19 30 19 57 04 31 04 44 05 11 05 50 09 33 13 36 18 21 8.8 0.2 2 1149+0345 THU APR 21 18 52 19 31 19 58 16 28 05 05 04 43 05 10 05 49 09 38 13 40 18 24 8.7 0.0 0 1234-0220 FRI APR 22 18 52 19 31 19 58 17 21 05 40 04 42 05 09 05 48 09 42 13 44 18 27 8.7 0.0 0 1321-0829 SAT APR 23 18 52 19 32 19 59 18 16 06 18 04 42 05 09 05 48 09 47 13 48 18 31 8.7 0.0 0 1410-1424 SUN APR 24 18 53 19 32 19 59 19 15 07 01 04 41 05 08 05 47 09 51 13 52 18 34 8.7 0.0 0 1503-1944 MON APR 25 18 53 19 32 20 00 20 17 07 51 04 40 05 07 05 46 09 55 13 56 18 37 8.7 0.3 3 1601-2406 TUE APR 26 18 53 19 33 20 00 21 22 04 39 05 06 05 46 09 59 14 00 18 40 8.7 1.4 15 1702-2704 WED APR 27 18 54 19 33 20 01 22 28 04 38 05 06 05 45 10 04 14 04 18 43 8.6 2.5 28 1806-2819 THU APR 28 18 54 19 34 20 01 23 30 04 37 05 05 05 44 10 08 14 08 18 46 8.6 3.5 40 1911-2740 FRI APR 29 18 55 19 34 20 02 00 28 04 37 05 04 05 44 10 13 14 12 18 50 8.6 4.4 51 2013-2513 SAT APR 30 18 55 19 35 20 02 01 18 04 36 05 03 05 43 10 17 14 16 18 53 8.6 5.3 61 2113-2113 ONE LINE REFERS TO EVENING DATE LAST QUARTER APR 02 00:53 UT AND FOLLOWING MORNING. NEW MOON APR 08 20:36 UT All dates and times are zone HST FIRST QUARTER APR 16 14:40 UT in upper table (except sid time). FULL MOON APR 24 10:09 UT