KECK OBSERVATORY CALENDAR FOR 2008 -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 2008 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 03 39 05 01 05 27 06 05 08 12 12 23 17 24 9.2 7.8 85 2149-1320 WED APR 02 18 46 19 24 19 50 04 17 05 00 05 26 06 04 08 16 12 27 17 27 9.2 8.4 92 2239-0723 THU APR 03 18 47 19 25 19 51 04 55 16 45 04 59 05 25 06 03 08 21 12 30 17 30 9.1 9.1 99 2329-0053 FRI APR 04 18 47 19 25 19 51 05 34 17 44 04 58 05 24 06 02 08 25 12 34 17 33 9.1 9.1 100 0020+0549 SAT APR 05 18 47 19 25 19 52 06 15 18 45 04 57 05 23 06 01 08 30 12 38 17 36 9.1 9.1 100 0113+1221 SUN APR 06 18 48 19 26 19 52 07 01 19 49 04 56 05 22 06 00 08 34 12 42 17 39 9.1 9.1 100 0210+1815 MON APR 07 18 48 19 26 19 52 07 52 20 57 04 55 05 21 06 00 08 38 12 46 17 42 9.0 8.0 88 0311+2303 TUE APR 08 18 48 19 26 19 53 22 06 04 54 05 20 05 59 08 43 12 50 17 45 9.0 6.8 75 0414+2619 WED APR 09 18 48 19 27 19 53 23 13 04 53 05 20 05 58 08 46 12 54 17 48 9.0 5.7 62 0520+2745 THU APR 10 18 49 19 27 19 53 00 16 04 52 05 19 05 57 08 50 12 58 17 51 9.0 4.6 51 0624+2716 FRI APR 11 18 49 19 27 19 54 01 12 04 51 05 18 05 56 08 55 13 02 17 54 9.0 3.6 40 0726+2502 SAT APR 12 18 49 19 28 19 54 02 00 04 50 05 17 05 55 08 59 13 06 17 57 8.9 2.8 31 0823+2124 SUN APR 13 18 50 19 28 19 55 02 43 04 50 05 16 05 55 09 04 13 10 18 01 8.9 2.1 23 0916+1644 MON APR 14 18 50 19 28 19 55 03 20 04 49 05 15 05 54 09 08 13 14 18 04 8.9 1.5 16 1005+1124 TUE APR 15 18 50 19 29 19 56 03 55 04 48 05 14 05 53 09 13 13 18 18 07 8.9 0.9 9 1051+0542 WED APR 16 18 51 19 29 19 56 04 28 04 47 05 14 05 52 09 17 13 22 18 10 8.9 0.3 3 1136-0008 THU APR 17 18 51 19 30 19 56 16 35 05 00 04 46 05 13 05 51 09 21 13 26 18 12 8.8 0.0 0 1220-0553 FRI APR 18 18 51 19 30 19 57 17 25 05 34 04 45 05 12 05 51 09 26 13 30 18 15 8.8 0.0 0 1305-1120 SAT APR 19 18 51 19 30 19 57 18 16 06 09 04 44 05 11 05 50 09 30 13 34 18 18 8.8 0.0 0 1350-1618 SUN APR 20 18 52 19 31 19 58 19 07 06 48 04 43 05 10 05 49 09 35 13 38 18 21 8.7 0.0 0 1437-2035 MON APR 21 18 52 19 31 19 58 19 59 07 29 04 42 05 09 05 48 09 39 13 41 18 24 8.7 0.0 0 1527-2400 TUE APR 22 18 52 19 32 19 59 20 53 04 42 05 09 05 48 09 44 13 45 18 28 8.7 0.9 10 1618-2623 WED APR 23 18 53 19 32 19 59 21 46 04 41 05 08 05 47 09 48 13 49 18 31 8.7 1.8 20 1711-2734 THU APR 24 18 53 19 32 20 00 22 37 04 40 05 07 05 46 09 53 13 53 18 34 8.7 2.6 30 1804-2729 FRI APR 25 18 53 19 33 20 00 23 26 04 39 05 06 05 46 09 57 13 57 18 37 8.7 3.4 39 1858-2608 SAT APR 26 18 54 19 33 20 01 00 12 04 38 05 06 05 45 10 02 14 01 18 40 8.6 4.2 48 1950-2333 SUN APR 27 18 54 19 34 20 01 00 54 04 37 05 05 05 44 10 05 14 05 18 43 8.6 4.9 56 2041-1950 MON APR 28 18 55 19 34 20 02 01 34 04 37 05 04 05 44 10 10 14 09 18 47 8.6 5.5 64 2130-1509 TUE APR 29 18 55 19 35 20 02 02 11 04 36 05 03 05 43 10 14 14 13 18 50 8.6 6.2 71 2219-0938 WED APR 30 18 55 19 35 20 03 02 48 04 35 05 03 05 42 10 19 14 17 18 53 8.5 6.8 79 2307-0330 ONE LINE REFERS TO EVENING DATE NEW MOON APR 06 03:56 UT AND FOLLOWING MORNING. FIRST QUARTER APR 12 18:34 UT All dates and times are zone HST FULL MOON APR 20 10:27 UT in upper table (except sid time). LAST QUARTER APR 28 14:16 UT