KECK OBSERVATORY CALENDAR FOR 2007 -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 2007 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight SAT SEP 01 18 48 19 26 19 52 21 43 04 52 05 18 05 56 18 14 22 23 03 16 9.0 1.9 20 0257+2205 SUN SEP 02 18 47 19 25 19 52 22 33 04 52 05 18 05 57 18 18 22 27 03 20 9.0 2.7 29 0357+2550 MON SEP 03 18 46 19 24 19 51 23 29 04 52 05 19 05 57 18 21 22 31 03 24 9.0 3.6 40 0459+2757 TUE SEP 04 18 45 19 23 19 50 00 28 04 53 05 19 05 57 18 24 22 35 03 28 9.0 4.6 51 0602+2817 WED SEP 05 18 44 19 22 19 49 01 30 04 53 05 19 05 57 18 27 22 39 03 32 9.1 5.7 62 0702+2654 THU SEP 06 18 43 19 21 19 48 02 32 04 53 05 19 05 57 18 30 22 43 03 36 9.1 6.7 74 0800+2401 FRI SEP 07 18 42 19 21 19 47 03 31 16 32 04 54 05 20 05 58 18 33 22 46 03 41 9.1 7.7 84 0853+1958 SAT SEP 08 18 42 19 20 19 46 04 26 17 12 04 54 05 20 05 58 18 36 22 50 03 45 9.1 8.7 94 0943+1502 SUN SEP 09 18 41 19 19 19 45 05 19 17 48 04 54 05 20 05 58 18 39 22 54 03 49 9.2 9.2 100 1030+0934 MON SEP 10 18 40 19 18 19 44 06 09 18 21 04 54 05 20 05 58 18 42 22 58 03 53 9.2 9.2 100 1114+0348 TUE SEP 11 18 39 19 17 19 43 06 59 18 53 04 55 05 21 05 59 18 45 23 02 03 58 9.2 9.2 100 1157-0159 WED SEP 12 18 38 19 16 19 42 07 47 19 25 04 55 05 21 05 59 18 47 23 06 04 02 9.2 9.2 100 1240-0739 THU SEP 13 18 37 19 15 19 41 19 57 04 55 05 21 05 59 18 50 23 10 04 06 9.2 9.0 97 1323-1259 FRI SEP 14 18 36 19 14 19 40 20 31 04 56 05 21 05 59 18 53 23 14 04 11 9.3 8.4 90 1408-1748 SAT SEP 15 18 35 19 13 19 39 21 07 04 56 05 22 05 59 18 56 23 18 04 15 9.3 7.8 84 1455-2156 SUN SEP 16 18 34 19 12 19 38 21 48 04 56 05 22 06 00 18 59 23 22 04 19 9.3 7.1 76 1545-2511 MON SEP 17 18 33 19 11 19 37 22 33 04 56 05 22 06 00 19 02 23 26 04 23 9.3 6.4 68 1637-2722 TUE SEP 18 18 32 19 10 19 36 23 23 04 57 05 22 06 00 19 05 23 30 04 28 9.3 5.6 59 1732-2818 WED SEP 19 18 32 19 09 19 35 00 18 04 57 05 23 06 00 19 08 23 34 04 32 9.4 4.6 49 1828-2752 THU SEP 20 18 31 19 08 19 34 01 15 04 57 05 23 06 00 19 11 23 38 04 36 9.4 3.7 39 1924-2558 FRI SEP 21 18 30 19 07 19 33 02 15 04 57 05 23 06 01 19 14 23 42 04 39 9.4 2.7 28 2020-2239 SAT SEP 22 18 29 19 06 19 32 03 15 04 58 05 23 06 01 19 17 23 46 04 44 9.4 1.7 18 2114-1801 SUN SEP 23 18 28 19 05 19 31 16 10 04 15 04 58 05 23 06 01 19 20 23 50 04 48 9.5 0.7 7 2207-1219 MON SEP 24 18 27 19 05 19 30 16 50 05 15 04 58 05 24 06 01 19 23 23 53 04 52 9.5 0.0 0 2259-0548 TUE SEP 25 18 26 19 04 19 29 17 30 06 16 04 58 05 24 06 01 19 26 23 57 04 56 9.5 0.0 0 2351+0109 WED SEP 26 18 25 19 03 19 28 18 09 07 18 04 59 05 24 06 02 19 29 00 01 05 01 9.5 0.0 0 0044+0810 THU SEP 27 18 24 19 02 19 27 18 51 04 59 05 24 06 02 19 32 00 05 05 05 9.5 0.0 0 0140+1445 FRI SEP 28 18 23 19 01 19 26 19 36 04 59 05 25 06 02 19 35 00 09 05 09 9.6 0.2 1 0238+2027 SAT SEP 29 18 22 19 00 19 26 20 26 04 59 05 25 06 02 19 38 00 13 05 13 9.6 1.0 10 0339+2449 SUN SEP 30 18 22 18 59 19 25 21 21 04 59 05 25 06 03 19 41 00 17 05 17 9.6 1.9 20 0443+2729 ONE LINE REFERS TO EVENING DATE LAST QUARTER SEP 04 02:36 UT AND FOLLOWING MORNING. NEW MOON SEP 11 12:45 UT All dates and times are zone HST FIRST QUARTER SEP 19 16:51 UT in upper table (except sid time). FULL MOON SEP 26 19:48 UT