KECK OBSERVATORY CALENDAR FOR 2004 -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 2004 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight WED DEC 01 17 52 18 33 18 59 21 49 05 23 05 50 06 30 23 23 04 24 09 48 10.4 2.8 27 0905+2155 THU DEC 02 17 53 18 33 19 00 22 42 05 24 05 51 06 31 23 28 04 28 09 53 10.4 3.7 35 0953+1751 FRI DEC 03 17 53 18 33 19 00 23 34 05 24 05 51 06 32 23 32 04 32 09 57 10.4 4.6 43 1039+1300 SAT DEC 04 17 53 18 33 19 00 00 25 05 25 05 52 06 32 23 35 04 36 10 02 10.4 5.4 52 1125+0734 SUN DEC 05 17 53 18 33 19 00 01 17 05 25 05 52 06 33 23 39 04 40 10 06 10.4 6.3 60 1210+0140 MON DEC 06 17 53 18 34 19 01 02 10 05 26 05 53 06 33 23 44 04 44 10 11 10.4 7.2 68 1256-0429 TUE DEC 07 17 54 18 34 19 01 03 07 05 27 05 54 06 34 23 48 04 48 10 16 10.4 8.1 77 1345-1039 WED DEC 08 17 54 18 34 19 01 04 07 05 27 05 54 06 35 23 52 04 52 10 20 10.4 9.1 87 1438-1631 THU DEC 09 17 54 18 35 19 02 05 12 05 28 05 55 06 35 23 57 04 56 10 25 10.4 10.2 97 1536-2139 FRI DEC 10 17 55 18 35 19 02 06 21 16 49 05 28 05 55 06 36 00 01 05 00 10 29 10.4 10.4 100 1639-2531 SAT DEC 11 17 55 18 35 19 02 07 31 17 49 05 29 05 56 06 36 00 05 05 04 10 34 10.5 10.5 100 1746-2737 SUN DEC 12 17 55 18 36 19 03 18 55 05 29 05 56 06 37 00 10 05 08 10 38 10.4 10.4 100 1855-2740 MON DEC 13 17 56 18 36 19 03 20 04 05 30 05 57 06 38 00 14 05 12 10 43 10.5 9.4 90 2002-2540 TUE DEC 14 17 56 18 37 19 04 21 13 05 30 05 58 06 38 00 19 05 16 10 47 10.4 8.3 79 2104-2155 WED DEC 15 17 56 18 37 19 04 22 18 05 31 05 58 06 39 00 23 05 20 10 52 10.4 7.2 69 2202-1653 THU DEC 16 17 57 18 37 19 05 23 19 05 31 05 59 06 39 00 28 05 24 10 56 10.4 6.2 59 2255-1106 FRI DEC 17 17 57 18 38 19 05 00 16 05 32 05 59 06 40 00 32 05 28 11 00 10.4 5.3 50 2344-0456 SAT DEC 18 17 58 18 38 19 05 01 10 05 33 06 00 06 40 00 36 05 31 11 05 10.5 4.4 41 0031+0114 SUN DEC 19 17 58 18 39 19 06 02 02 05 33 06 00 06 41 00 41 05 35 11 09 10.4 3.5 33 0117+0713 MON DEC 20 17 59 18 39 19 06 02 55 05 34 06 01 06 41 00 45 05 39 11 14 10.5 2.6 25 0203+1247 TUE DEC 21 17 59 18 40 19 07 03 48 05 34 06 01 06 42 00 50 05 43 11 18 10.4 1.8 16 0250+1744 WED DEC 22 18 00 18 40 19 07 04 42 05 35 06 02 06 42 00 53 05 47 11 23 10.5 0.9 8 0339+2154 THU DEC 23 18 00 18 41 19 08 05 37 05 35 06 02 06 43 00 58 05 51 11 27 10.5 0.0 0 0430+2505 FRI DEC 24 18 01 18 41 19 08 16 16 06 31 05 35 06 03 06 43 01 02 05 55 11 31 10.5 0.0 0 0522+2707 SAT DEC 25 18 01 18 42 19 09 17 04 07 24 05 36 06 03 06 44 01 07 05 59 11 36 10.5 0.0 0 0616+2754 SUN DEC 26 18 02 18 42 19 10 17 56 05 36 06 04 06 44 01 12 06 03 11 40 10.4 0.0 0 0709+2722 MON DEC 27 18 02 18 43 19 10 18 49 05 37 06 04 06 44 01 16 06 07 11 45 10.5 0.0 0 0802+2536 TUE DEC 28 18 03 18 43 19 11 19 43 05 37 06 04 06 45 01 21 06 11 11 49 10.4 0.5 5 0852+2241 WED DEC 29 18 04 18 44 19 11 20 36 05 38 06 05 06 45 01 25 06 15 11 54 10.5 1.4 13 0940+1850 THU DEC 30 18 04 18 45 19 12 21 28 05 38 06 05 06 46 01 30 06 19 11 58 10.4 2.3 21 1026+1412 FRI DEC 31 18 05 18 45 19 12 22 19 05 38 06 06 06 46 01 34 06 23 12 02 10.4 3.1 29 1111+0858 ONE LINE REFERS TO EVENING DATE LAST QUARTER DEC 05 00:56 UT AND FOLLOWING MORNING. NEW MOON DEC 12 01:32 UT All dates and times are zone HST FIRST QUARTER DEC 18 16:41 UT in upper table (except sid time). FULL MOON DEC 26 15:08 UT