KECK OBSERVATORY CALENDAR FOR 2003 -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 2003 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight TUE APR 01 18 46 19 24 19 50 06 49 19 02 05 02 05 28 06 05 07 43 12 19 17 48 10.1 10.1 100 0118+0442 WED APR 02 18 46 19 24 19 50 07 22 19 51 05 01 05 27 06 05 07 47 12 23 17 51 10.1 9.6 95 0201+0947 THU APR 03 18 46 19 24 19 50 07 56 20 40 05 00 05 26 06 04 07 51 12 27 17 54 10.0 8.8 87 0246+1430 FRI APR 04 18 47 19 25 19 51 21 30 04 59 05 25 06 03 07 56 12 31 17 57 10.0 7.9 79 0332+1841 SAT APR 05 18 47 19 25 19 51 22 23 04 58 05 24 06 02 07 59 12 35 18 00 10.0 7.0 70 0421+2208 SUN APR 06 18 47 19 25 19 52 23 16 04 57 05 23 06 01 08 03 12 39 18 03 10.0 6.1 61 0512+2440 MON APR 07 18 48 19 26 19 52 00 10 04 56 05 22 06 00 08 08 12 43 18 06 9.9 5.2 52 0605+2606 TUE APR 08 18 48 19 26 19 52 01 03 04 55 05 21 06 00 08 12 12 47 18 09 9.9 4.3 43 0700+2617 WED APR 09 18 48 19 26 19 53 01 55 04 54 05 20 05 59 08 16 12 51 18 12 9.9 3.4 34 0756+2507 THU APR 10 18 48 19 27 19 53 02 44 04 53 05 20 05 58 08 21 12 55 18 16 9.9 2.6 26 0852+2235 FRI APR 11 18 49 19 27 19 53 03 30 04 52 05 19 05 57 08 25 12 59 18 19 9.9 1.8 18 0948+1843 SAT APR 12 18 49 19 27 19 54 04 14 04 51 05 18 05 56 08 29 13 03 18 22 9.8 1.1 10 1042+1342 SUN APR 13 18 49 19 28 19 54 04 56 04 50 05 17 05 55 08 34 13 07 18 25 9.8 0.3 3 1136+0747 MON APR 14 18 50 19 28 19 55 16 46 05 37 04 50 05 16 05 55 08 38 13 11 18 28 9.8 0.0 0 1230+0116 TUE APR 15 18 50 19 28 19 55 17 48 06 19 04 49 05 15 05 54 08 42 13 15 18 31 9.8 0.0 0 1324-0525 WED APR 16 18 50 19 29 19 56 18 52 07 04 04 48 05 14 05 53 08 47 13 19 18 33 9.7 0.0 0 1420-1152 THU APR 17 18 51 19 29 19 56 19 57 07 52 04 47 05 14 05 52 08 51 13 23 18 37 9.7 0.5 4 1518-1734 FRI APR 18 18 51 19 30 19 56 21 04 04 46 05 13 05 51 08 56 13 27 18 40 9.7 1.6 16 1619-2206 SAT APR 19 18 51 19 30 19 57 22 11 04 45 05 12 05 51 09 00 13 30 18 43 9.7 2.7 27 1722-2506 SUN APR 20 18 51 19 30 19 57 23 15 04 44 05 11 05 50 09 04 13 34 18 46 9.7 3.8 38 1825-2623 MON APR 21 18 52 19 31 19 58 00 14 04 43 05 10 05 49 09 09 13 38 18 49 9.7 4.7 48 1926-2559 TUE APR 22 18 52 19 31 19 58 01 08 04 42 05 09 05 48 09 13 13 42 18 52 9.6 5.6 58 2024-2405 WED APR 23 18 52 19 32 19 59 01 55 04 42 05 09 05 48 09 17 13 46 18 56 9.6 6.4 66 2119-2058 THU APR 24 18 53 19 32 19 59 02 36 04 41 05 08 05 47 09 21 13 50 18 59 9.6 7.1 73 2209-1655 FRI APR 25 18 53 19 32 20 00 03 13 04 40 05 07 05 46 09 25 13 54 19 02 9.6 7.7 80 2257-1215 SAT APR 26 18 53 19 33 20 00 03 47 04 39 05 06 05 46 09 30 13 58 19 05 9.6 8.2 86 2342-0711 SUN APR 27 18 54 19 33 20 01 04 20 16 11 04 38 05 06 05 45 09 34 14 02 19 09 9.6 8.8 91 0025-0155 MON APR 28 18 54 19 34 20 01 04 51 16 59 04 37 05 05 05 44 09 39 14 06 19 12 9.5 9.3 97 0108+0322 TUE APR 29 18 55 19 34 20 02 05 24 17 47 04 37 05 04 05 44 09 43 14 10 19 15 9.5 9.5 100 0150+0831 WED APR 30 18 55 19 35 20 02 05 57 18 36 04 36 05 03 05 43 09 48 14 14 19 18 9.5 9.5 100 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