KECK OBSERVATORY CALENDAR FOR 2009 -ASTRONOMICAL (computed for altitude 4160.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) Zenith 2009 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 18 18 h h % h m d m deg WED APR 01 18 46 19 24 19 50 01 16 05 02 05 28 06 06 08 11 12 22 17 24 9.2 3.8 40 0642 2502 77 THU APR 02 18 46 19 24 19 50 02 09 05 01 05 27 06 05 08 15 12 26 17 27 9.2 2.9 31 0743 2208 66 FRI APR 03 18 47 19 24 19 51 02 56 05 00 05 26 06 04 08 20 12 29 17 30 9.1 2.1 22 0840 1752 54 SAT APR 04 18 47 19 25 19 51 14 12 03 38 04 59 05 25 06 03 08 24 12 33 17 33 9.1 1.4 14 0935 1234 43 SUN APR 05 18 47 19 25 19 51 15 11 04 17 04 58 05 24 06 02 08 28 12 37 17 36 9.1 0.7 7 1027 0638 34 MON APR 06 18 47 19 25 19 52 16 08 04 54 04 57 05 23 06 01 08 33 12 41 17 39 9.1 0.0 0 1117 0025 28 TUE APR 07 18 48 19 26 19 52 17 04 05 31 04 56 05 22 06 00 08 37 12 45 17 42 9.1 0.0 0 1206-0546 27 WED APR 08 18 48 19 26 19 52 17 59 06 09 04 55 05 21 06 00 08 41 12 49 17 45 9.0 0.0 0 1256-1137 31 THU APR 09 18 48 19 26 19 53 18 55 06 49 04 54 05 20 05 59 08 45 12 53 17 48 9.0 0.0 0 1346-1649 39 FRI APR 10 18 48 19 27 19 53 19 51 04 53 05 20 05 58 08 49 12 57 17 51 9.0 0.0 0 1438-2109 48 SAT APR 11 18 49 19 27 19 53 20 47 04 52 05 19 05 57 08 53 13 01 17 54 9.0 0.9 10 1531-2424 57 SUN APR 12 18 49 19 27 19 54 21 42 04 51 05 18 05 56 08 58 13 05 17 57 9.0 1.8 20 1626-2626 67 MON APR 13 18 49 19 28 19 54 22 35 04 50 05 17 05 55 09 02 13 09 18 00 8.9 2.7 30 1720-2706 77 TUE APR 14 18 50 19 28 19 55 23 26 04 50 05 16 05 55 09 07 13 13 18 04 8.9 3.5 39 1813-2630 86 WED APR 15 18 50 19 29 19 55 00 12 04 49 05 15 05 54 09 11 13 17 18 07 8.9 4.3 48 1906-2451 >90 THU APR 16 18 50 19 29 19 56 00 55 04 48 05 14 05 53 09 16 13 21 18 10 8.9 5.0 56 1956-2203 >90 FRI APR 17 18 51 19 29 19 56 01 35 04 47 05 14 05 52 09 20 13 25 18 12 8.9 5.7 63 2044-1821 >90 SAT APR 18 18 51 19 30 19 56 02 12 04 46 05 13 05 51 09 24 13 29 18 15 8.8 6.3 70 2130-1354 >90 SUN APR 19 18 51 19 30 19 57 02 47 14 18 04 45 05 12 05 51 09 29 13 33 18 18 8.8 6.8 77 2216-0850 >90 MON APR 20 18 52 19 30 19 57 03 21 15 08 04 44 05 11 05 50 09 33 13 37 18 21 8.8 7.4 84 2301-0321 >90 TUE APR 21 18 52 19 31 19 58 03 57 16 01 04 43 05 10 05 49 09 38 13 40 18 24 8.7 8.0 91 2347 0223 >90 WED APR 22 18 52 19 31 19 58 04 34 16 55 04 42 05 09 05 49 09 42 13 44 18 27 8.7 8.6 98 0035 0810 >90 THU APR 23 18 53 19 32 19 59 05 14 17 52 04 42 05 09 05 48 09 47 13 48 18 31 8.7 8.7 100 0125 1341 >90 FRI APR 24 18 53 19 32 19 59 06 00 18 53 04 41 05 08 05 47 09 51 13 52 18 34 8.7 8.7 100 0219 1837 >90 SAT APR 25 18 53 19 32 20 00 06 51 19 57 04 40 05 07 05 46 09 56 13 56 18 37 8.7 8.7 100 0317 2234 >90 SUN APR 26 18 54 19 33 20 00 21 03 04 39 05 06 05 46 10 00 14 00 18 40 8.7 7.6 87 0419 2508 >90 MON APR 27 18 54 19 33 20 01 22 09 04 38 05 06 05 45 10 04 14 04 18 43 8.6 6.5 75 0523 2601 >90 TUE APR 28 18 54 19 34 20 01 23 10 04 37 05 05 05 44 10 08 14 08 18 46 8.6 5.5 63 0627 2507 >90 WED APR 29 18 55 19 34 20 02 00 05 04 37 05 04 05 44 10 13 14 12 18 50 8.6 4.5 52 0734 2202 >90 THU APR 30 18 55 19 35 20 02 00 54 04 36 05 03 05 43 10 17 14 16 18 53 8.6 3.7 43 0827 1831 81 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Apr 02 14:33 UT AND FOLLOWING MORNING. FULL MOON Apr 09 14:57 UT All dates and times are zone HST LAST QUARTER Apr 17 13:36 UT in upper table (except sid time). NEW MOON Apr 25 03:22 UT