KECK OBSERVATORY CALENDAR FOR 2010 -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 2010 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 THU APR 01 18 46 19 24 19 50 21 29 05 02 05 28 06 06 08 10 12 21 17 23 9.2 1.6 17 1534-2337 64 FRI APR 02 18 46 19 24 19 50 22 28 05 01 05 27 06 05 08 14 12 25 17 26 9.2 2.6 28 1632-2518 75 SAT APR 03 18 47 19 24 19 51 23 24 05 00 05 26 06 04 08 19 12 29 17 29 9.1 3.5 38 1728-2536 86 SUN APR 04 18 47 19 25 19 51 00 15 04 59 05 25 06 03 08 23 12 32 17 32 9.1 4.4 48 1824-2443 >90 MON APR 05 18 47 19 25 19 51 01 01 04 58 05 24 06 02 08 27 12 36 17 35 9.1 5.2 56 1916-2238 >90 TUE APR 06 18 47 19 25 19 52 01 43 04 57 05 23 06 01 08 32 12 40 17 38 9.1 5.8 64 2005-1937 >90 WED APR 07 18 48 19 26 19 52 02 21 04 56 05 22 06 00 08 36 12 44 17 41 9.1 6.5 71 2052-1551 >90 THU APR 08 18 48 19 26 19 52 02 57 14 20 04 55 05 21 06 00 08 40 12 48 17 44 9.0 7.1 78 2137-1131 >90 FRI APR 09 18 48 19 26 19 53 03 30 15 09 04 54 05 20 05 59 08 45 12 52 17 47 9.0 7.6 84 2221-0648 >90 SAT APR 10 18 48 19 27 19 53 04 03 15 57 04 53 05 20 05 58 08 48 12 56 17 50 9.0 8.2 90 2304-0148 >90 SUN APR 11 18 49 19 27 19 53 04 37 16 46 04 52 05 19 05 57 08 52 13 00 17 53 9.0 8.7 97 2347 0317 >90 MON APR 12 18 49 19 27 19 54 05 12 17 36 04 51 05 18 05 56 08 57 13 04 17 56 9.0 9.0 100 0031 0818 >90 TUE APR 13 18 49 19 28 19 54 05 49 18 28 04 50 05 17 05 55 09 01 13 08 17 59 8.9 8.9 100 0118 1304 >90 WED APR 14 18 50 19 28 19 55 06 30 19 22 04 50 05 16 05 55 09 06 13 12 18 03 8.9 8.9 100 0207 1720 >90 THU APR 15 18 50 19 29 19 55 20 19 04 49 05 15 05 54 09 10 13 16 18 06 8.9 8.5 95 0259 2052 >90 FRI APR 16 18 50 19 29 19 56 21 18 04 48 05 14 05 53 09 15 13 20 18 09 8.9 7.5 84 0355 2322 >90 SAT APR 17 18 51 19 29 19 56 22 17 04 47 05 14 05 52 09 19 13 24 18 12 8.9 6.5 73 0453 2436 >90 SUN APR 18 18 51 19 30 19 56 23 15 04 46 05 13 05 51 09 23 13 28 18 14 8.8 5.5 62 0552 2422 >90 MON APR 19 18 51 19 30 19 57 00 09 04 45 05 12 05 51 09 28 13 32 18 17 8.8 4.6 52 0655 2219 >90 TUE APR 20 18 52 19 30 19 57 01 00 04 44 05 11 05 50 09 32 13 36 18 20 8.8 3.7 42 0750 1930 80 WED APR 21 18 52 19 31 19 58 01 46 04 43 05 10 05 49 09 37 13 40 18 23 8.7 3.0 33 0847 1510 69 THU APR 22 18 52 19 31 19 58 02 29 04 42 05 09 05 49 09 41 13 43 18 26 8.7 2.2 25 0941 0952 59 FRI APR 23 18 53 19 32 19 59 14 11 03 10 04 42 05 09 05 48 09 46 13 47 18 30 8.7 1.5 17 1035 0358 49 SAT APR 24 18 53 19 32 19 59 15 11 03 51 04 41 05 08 05 47 09 50 13 51 18 33 8.7 0.8 9 1128-0213 42 SUN APR 25 18 53 19 32 20 00 16 10 04 33 04 40 05 07 05 46 09 55 13 55 18 36 8.7 0.1 1 1221-0818 36 MON APR 26 18 54 19 33 20 00 17 10 05 16 04 39 05 06 05 46 09 59 13 59 18 39 8.7 0.0 0 1315-1356 35 TUE APR 27 18 54 19 33 20 01 18 11 06 02 04 38 05 06 05 45 10 04 14 03 18 42 8.6 0.0 0 1411-1845 39 WED APR 28 18 54 19 34 20 01 19 12 06 52 04 37 05 05 05 44 10 07 14 07 18 45 8.6 0.0 0 1509-2227 45 THU APR 29 18 55 19 34 20 02 20 12 04 37 05 04 05 44 10 12 14 11 18 49 8.6 0.2 1 1608-2447 53 FRI APR 30 18 55 19 35 20 02 21 10 04 36 05 03 05 43 10 16 14 15 18 52 8.6 1.1 13 1706-2541 62 ONE LINE REFERS TO EVENING DATE LAST QUARTER Apr 06 09:37 UT AND FOLLOWING MORNING. NEW MOON Apr 14 12:31 UT All dates and times are zone HST FIRST QUARTER Apr 21 18:20 UT in upper table (except sid time). FULL MOON Apr 28 12:20 UT