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 MON SEP 01 18 47 19 25 19 52 20 04 04 52 05 18 05 57 18 17 22 26 03 19 9.0 8.8 97 1241-0907 TUE SEP 02 18 46 19 24 19 51 20 39 04 52 05 19 05 57 18 20 22 30 03 23 9.0 8.2 91 1328-1428 WED SEP 03 18 45 19 23 19 50 21 17 04 53 05 19 05 57 18 23 22 34 03 27 9.0 7.6 83 1416-1906 THU SEP 04 18 44 19 22 19 49 21 57 04 53 05 19 05 57 18 26 22 38 03 31 9.1 6.9 76 1505-2252 FRI SEP 05 18 43 19 21 19 48 22 40 04 53 05 19 05 57 18 29 22 42 03 35 9.1 6.2 68 1556-2535 SAT SEP 06 18 42 19 21 19 47 23 27 04 54 05 20 05 58 18 32 22 46 03 40 9.1 5.4 59 1649-2709 SUN SEP 07 18 42 19 20 19 46 00 18 04 54 05 20 05 58 18 35 22 49 03 44 9.1 4.6 50 1742-2729 MON SEP 08 18 41 19 19 19 45 01 10 04 54 05 20 05 58 18 38 22 53 03 48 9.2 3.7 40 1836-2633 TUE SEP 09 18 40 19 18 19 44 02 05 04 54 05 20 05 58 18 41 22 57 03 52 9.2 2.8 30 1928-2422 WED SEP 10 18 39 19 17 19 43 03 00 04 55 05 21 05 59 18 44 23 01 03 57 9.2 1.9 20 2020-2101 THU SEP 11 18 38 19 16 19 42 16 04 03 54 04 55 05 21 05 59 18 47 23 05 04 01 9.2 1.0 11 2109-1639 FRI SEP 12 18 37 19 15 19 41 16 43 04 49 04 55 05 21 05 59 18 49 23 09 04 05 9.2 0.1 1 2158-1126 SAT SEP 13 18 36 19 14 19 40 17 20 05 43 04 56 05 21 05 59 18 52 23 13 04 10 9.3 0.0 0 2246-0536 SUN SEP 14 18 35 19 13 19 39 17 56 06 39 04 56 05 22 05 59 18 55 23 17 04 14 9.3 0.0 0 2334+0037 MON SEP 15 18 34 19 12 19 38 18 32 07 36 04 56 05 22 06 00 18 58 23 21 04 18 9.3 0.0 0 0024+0655 TUE SEP 16 18 33 19 11 19 37 19 11 04 56 05 22 06 00 19 01 23 25 04 22 9.3 0.0 0 0115+1300 WED SEP 17 18 32 19 10 19 36 19 53 04 57 05 22 06 00 19 04 23 29 04 27 9.3 0.3 3 0209+1827 THU SEP 18 18 32 19 09 19 35 20 39 04 57 05 23 06 00 19 07 23 33 04 31 9.4 1.1 11 0307+2255 FRI SEP 19 18 31 19 08 19 34 21 31 04 57 05 23 06 00 19 10 23 37 04 35 9.4 1.9 20 0409+2600 SAT SEP 20 18 30 19 07 19 33 22 30 04 57 05 23 06 01 19 13 23 41 04 39 9.4 3.0 31 0512+2724 SUN SEP 21 18 29 19 06 19 32 23 32 04 58 05 23 06 01 19 16 23 45 04 43 9.4 4.0 42 0616+2659 MON SEP 22 18 28 19 05 19 31 00 37 04 58 05 23 06 01 19 19 23 49 04 47 9.5 5.1 53 0718+2450 TUE SEP 23 18 27 19 05 19 30 01 41 04 58 05 24 06 01 19 22 23 53 04 51 9.5 6.2 65 0816+2113 WED SEP 24 18 26 19 04 19 29 02 43 04 58 05 24 06 01 19 25 23 56 04 55 9.5 7.2 76 0911+1627 THU SEP 25 18 25 19 03 19 28 03 41 16 13 04 59 05 24 06 02 19 28 00 00 05 00 9.5 8.2 86 1002+1055 FRI SEP 26 18 24 19 02 19 27 04 37 16 51 04 59 05 24 06 02 19 31 00 04 05 04 9.5 9.2 96 1051+0457 SAT SEP 27 18 23 19 01 19 26 05 30 17 26 04 59 05 25 06 02 19 34 00 08 05 08 9.6 9.6 100 1138-0107 SUN SEP 28 18 22 19 00 19 26 06 23 18 01 04 59 05 25 06 02 19 38 00 12 05 12 9.6 9.6 100 1225-0703 MON SEP 29 18 22 18 59 19 25 07 16 18 36 04 59 05 25 06 03 19 40 00 16 05 16 9.6 9.6 100 1312-1235 TUE SEP 30 18 21 18 58 19 24 19 13 05 00 05 25 06 03 19 43 00 20 05 21 9.6 9.6 100 1359-1729 ONE LINE REFERS TO EVENING DATE FIRST QUARTER SEP 07 14:08 UT AND FOLLOWING MORNING. FULL MOON SEP 15 09:15 UT All dates and times are zone HST LAST QUARTER SEP 22 05:08 UT in upper table (except sid time). NEW MOON SEP 29 08:14 UT