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 SEP 01 18 47 19 25 19 52 20 33 04 52 05 18 05 57 18 17 22 26 03 18 9.0 0.7 7 0128+0816 THU SEP 02 18 46 19 24 19 51 21 08 04 52 05 19 05 57 18 20 22 30 03 22 9.0 1.3 14 0215+1349 FRI SEP 03 18 45 19 23 19 50 21 45 04 53 05 19 05 57 18 23 22 34 03 27 9.0 1.9 21 0303+1840 SAT SEP 04 18 44 19 22 19 49 22 24 04 53 05 19 05 57 18 26 22 38 03 31 9.1 2.6 28 0352+2238 SUN SEP 05 18 43 19 21 19 48 23 06 04 53 05 19 05 57 18 29 22 41 03 35 9.1 3.3 36 0443+2533 MON SEP 06 18 42 19 21 19 47 23 52 04 54 05 20 05 58 18 32 22 45 03 40 9.1 4.1 44 0535+2720 TUE SEP 07 18 42 19 20 19 46 00 42 04 54 05 20 05 58 18 35 22 49 03 44 9.1 4.9 54 0629+2751 WED SEP 08 18 41 19 19 19 45 01 35 04 54 05 20 05 58 18 38 22 53 03 48 9.2 5.8 63 0722+2705 THU SEP 09 18 40 19 18 19 44 02 30 04 54 05 20 05 58 18 41 22 57 03 52 9.2 6.8 73 0815+2503 FRI SEP 10 18 39 19 17 19 43 03 25 16 34 04 55 05 21 05 59 18 43 23 01 03 57 9.2 7.7 83 0906+2151 SAT SEP 11 18 38 19 16 19 42 04 20 17 14 04 55 05 21 05 59 18 46 23 05 04 01 9.2 8.6 93 0956+1737 SUN SEP 12 18 37 19 15 19 41 05 14 17 52 04 55 05 21 05 59 18 49 23 09 04 05 9.2 9.2 100 1044+1233 MON SEP 13 18 36 19 14 19 40 06 08 18 27 04 56 05 21 05 59 18 52 23 13 04 10 9.3 9.3 100 1131+0650 TUE SEP 14 18 35 19 13 19 39 07 02 19 02 04 56 05 22 05 59 18 55 23 17 04 14 9.3 9.3 100 1218+0043 WED SEP 15 18 34 19 12 19 38 07 57 19 37 04 56 05 22 06 00 18 58 23 21 04 18 9.3 9.3 100 1305-0532 THU SEP 16 18 33 19 11 19 37 20 14 04 56 05 22 06 00 19 01 23 25 04 22 9.3 8.7 93 1355-1138 FRI SEP 17 18 32 19 10 19 36 20 54 04 57 05 22 06 00 19 04 23 29 04 27 9.3 8.1 86 1447-1716 SAT SEP 18 18 32 19 09 19 35 21 39 04 57 05 23 06 00 19 07 23 33 04 31 9.4 7.3 77 1543-2203 SUN SEP 19 18 31 19 08 19 34 22 29 04 57 05 23 06 00 19 10 23 37 04 34 9.4 6.5 68 1642-2537 MON SEP 20 18 30 19 07 19 33 23 26 04 57 05 23 06 01 19 13 23 41 04 38 9.4 5.5 58 1745-2737 TUE SEP 21 18 29 19 06 19 32 00 28 04 58 05 23 06 01 19 16 23 45 04 43 9.4 4.5 47 1849-2748 WED SEP 22 18 28 19 05 19 31 01 33 04 58 05 23 06 01 19 19 23 48 04 47 9.5 3.4 36 1952-2610 THU SEP 23 18 27 19 05 19 30 02 38 04 58 05 24 06 01 19 22 23 52 04 51 9.5 2.3 24 2053-2252 FRI SEP 24 18 26 19 04 19 29 03 41 04 58 05 24 06 01 19 25 23 56 04 55 9.5 1.3 13 2150-1814 SAT SEP 25 18 25 19 03 19 28 16 37 04 41 04 59 05 24 06 02 19 28 00 00 05 00 9.5 0.3 3 2243-1239 SUN SEP 26 18 24 19 02 19 27 17 17 05 38 04 59 05 24 06 02 19 31 00 04 05 04 9.5 0.0 0 2334-0631 MON SEP 27 18 23 19 01 19 26 17 54 06 34 04 59 05 25 06 02 19 33 00 08 05 08 9.6 0.0 0 0022-0010 TUE SEP 28 18 22 19 00 19 26 18 29 07 28 04 59 05 25 06 02 19 37 00 12 05 12 9.6 0.0 0 0109+0602 WED SEP 29 18 22 18 59 19 25 19 04 04 59 05 25 06 03 19 40 00 16 05 16 9.6 0.0 0 0157+1152 THU SEP 30 18 21 18 58 19 24 19 40 05 00 05 25 06 03 19 43 00 20 05 21 9.6 0.3 2 0245+1705 ONE LINE REFERS TO EVENING DATE LAST QUARTER SEP 06 15:14 UT AND FOLLOWING MORNING. NEW MOON SEP 14 14:30 UT All dates and times are zone HST FIRST QUARTER SEP 21 15:56 UT in upper table (except sid time). FULL MOON SEP 28 13:12 UT