KECK OBSERVATORY CALENDAR FOR 2003 -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 2003 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight TUE APR 01 18 46 19 24 19 50 06 49 19 02 05 02 05 28 06 05 08 09 12 19 17 22 9.2 9.2 100 0118+0442 WED APR 02 18 46 19 24 19 50 07 22 19 51 05 01 05 27 06 05 08 13 12 23 17 25 9.2 9.2 99 0201+0947 THU APR 03 18 46 19 24 19 50 07 56 20 40 05 00 05 26 06 04 08 17 12 27 17 28 9.2 8.3 90 0246+1430 FRI APR 04 18 47 19 25 19 51 21 30 04 59 05 25 06 03 08 22 12 31 17 31 9.1 7.5 81 0332+1841 SAT APR 05 18 47 19 25 19 51 22 23 04 58 05 24 06 02 08 26 12 35 17 34 9.1 6.6 72 0421+2208 SUN APR 06 18 47 19 25 19 52 23 16 04 57 05 23 06 01 08 31 12 39 17 37 9.1 5.7 62 0512+2440 MON APR 07 18 48 19 26 19 52 00 10 04 56 05 22 06 00 08 34 12 43 17 40 9.1 4.8 52 0605+2606 TUE APR 08 18 48 19 26 19 52 01 03 04 55 05 21 06 00 08 38 12 47 17 43 9.0 3.9 42 0700+2617 WED APR 09 18 48 19 26 19 53 01 55 04 54 05 20 05 59 08 43 12 51 17 46 9.0 3.0 33 0756+2507 THU APR 10 18 48 19 27 19 53 02 44 04 53 05 20 05 58 08 47 12 55 17 49 9.0 2.1 23 0852+2235 FRI APR 11 18 49 19 27 19 53 03 30 04 52 05 19 05 57 08 51 12 59 17 52 9.0 1.4 15 0948+1843 SAT APR 12 18 49 19 27 19 54 04 14 04 51 05 18 05 56 08 56 13 03 17 55 9.0 0.6 6 1042+1342 SUN APR 13 18 49 19 28 19 54 04 56 04 50 05 17 05 55 09 00 13 07 17 58 8.9 0.0 0 1136+0747 MON APR 14 18 50 19 28 19 55 16 46 05 37 04 50 05 16 05 55 09 05 13 11 18 02 8.9 0.0 0 1230+0116 TUE APR 15 18 50 19 28 19 55 17 48 06 19 04 49 05 15 05 54 09 09 13 15 18 04 8.9 0.0 0 1324-0525 WED APR 16 18 50 19 29 19 56 18 52 07 04 04 48 05 14 05 53 09 14 13 19 18 07 8.9 0.0 0 1420-1152 THU APR 17 18 51 19 29 19 56 19 57 07 52 04 47 05 14 05 52 09 18 13 23 18 10 8.9 0.0 0 1518-1734 FRI APR 18 18 51 19 30 19 56 21 04 04 46 05 13 05 51 09 22 13 27 18 13 8.8 1.1 12 1619-2206 SAT APR 19 18 51 19 30 19 57 22 11 04 45 05 12 05 51 09 27 13 30 18 16 8.8 2.2 25 1722-2506 SUN APR 20 18 51 19 30 19 57 23 15 04 44 05 11 05 50 09 31 13 34 18 19 8.8 3.3 37 1825-2623 MON APR 21 18 52 19 31 19 58 00 14 04 43 05 10 05 49 09 36 13 38 18 22 8.7 4.3 48 1926-2559 TUE APR 22 18 52 19 31 19 58 01 08 04 42 05 09 05 48 09 40 13 42 18 25 8.7 5.2 59 2024-2405 WED APR 23 18 52 19 32 19 59 01 55 04 42 05 09 05 48 09 45 13 46 18 29 8.7 5.9 68 2119-2058 THU APR 24 18 53 19 32 19 59 02 36 04 41 05 08 05 47 09 49 13 50 18 32 8.7 6.6 76 2209-1655 FRI APR 25 18 53 19 32 20 00 03 13 04 40 05 07 05 46 09 53 13 54 18 35 8.7 7.2 83 2257-1215 SAT APR 26 18 53 19 33 20 00 03 47 04 39 05 06 05 46 09 57 13 58 18 38 8.7 7.8 89 2342-0711 SUN APR 27 18 54 19 33 20 01 04 20 16 11 04 38 05 06 05 45 10 02 14 02 18 41 8.6 8.3 96 0025-0155 MON APR 28 18 54 19 34 20 01 04 51 16 59 04 37 05 05 05 44 10 06 14 06 18 44 8.6 8.6 100 0108+0322 TUE APR 29 18 55 19 34 20 02 05 24 17 47 04 37 05 04 05 44 10 11 14 10 18 48 8.6 8.6 100 0150+0831 WED APR 30 18 55 19 35 20 02 05 57 18 36 04 36 05 03 05 43 10 15 14 14 18 51 8.6 8.6 100 0234+1322 ONE LINE REFERS TO EVENING DATE NEW MOON APR 01 19:20 UT AND FOLLOWING MORNING. FIRST QUARTER APR 09 23:44 UT All dates and times are zone HST FULL MOON APR 16 19:37 UT in upper table (except sid time). LAST QUARTER APR 23 12:21 UT