KECK OBSERVATORY CALENDAR FOR 2010 -ASTRONOMICAL (computed for altitude 4160.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) Zenith 2010 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 18 18 h h % h m d m deg WED SEP 01 18 48 19 26 19 53 23 55 04 52 05 18 05 56 18 16 22 24 03 17 9.0 4.0 44 0506 2354 >90 THU SEP 02 18 47 19 25 19 52 00 54 14 05 04 52 05 18 05 57 18 19 22 28 03 21 9.0 5.0 55 0611 2343 >90 FRI SEP 03 18 46 19 24 19 51 01 57 15 00 04 52 05 19 05 57 18 22 22 32 03 25 9.0 6.1 67 0711 2130 >90 SAT SEP 04 18 45 19 23 19 50 03 02 15 53 04 53 05 19 05 57 18 25 22 36 03 29 9.0 7.2 79 0810 1753 >90 SUN SEP 05 18 44 19 22 19 49 04 07 16 42 04 53 05 19 05 57 18 28 22 40 03 33 9.1 8.3 91 0908 1304 >90 MON SEP 06 18 43 19 21 19 48 05 12 17 28 04 53 05 19 05 57 18 31 22 44 03 37 9.1 9.1 100 1004 0723 >90 TUE SEP 07 18 43 19 21 19 47 06 15 18 12 04 54 05 20 05 58 18 34 22 48 03 42 9.1 9.1 100 1059 0112 >90 WED SEP 08 18 42 19 20 19 46 18 56 04 54 05 20 05 58 18 37 22 51 03 46 9.1 9.1 100 1153-0503 >90 THU SEP 09 18 41 19 19 19 45 19 40 04 54 05 20 05 58 18 40 22 55 03 50 9.2 9.2 100 1248-1057 >90 FRI SEP 10 18 40 19 18 19 44 20 26 04 54 05 20 05 58 18 43 22 59 03 54 9.2 8.5 92 1344-1608 >90 SAT SEP 11 18 39 19 17 19 43 21 14 04 55 05 21 05 59 18 46 23 03 03 59 9.2 7.7 83 1440-2017 >90 SUN SEP 12 18 38 19 16 19 42 22 05 04 55 05 21 05 59 18 49 23 07 04 03 9.2 6.8 74 1538-2311 >90 MON SEP 13 18 37 19 15 19 41 22 58 04 55 05 21 05 59 18 51 23 11 04 07 9.2 5.9 64 1635-2443 >90 TUE SEP 14 18 36 19 14 19 40 23 53 04 56 05 21 05 59 18 54 23 15 04 12 9.3 5.1 54 1732-2454 >90 WED SEP 15 18 35 19 13 19 39 00 47 04 56 05 22 05 59 18 57 23 19 04 16 9.3 4.2 44 1827-2346 84 THU SEP 16 18 34 19 12 19 38 14 03 01 41 04 56 05 22 06 00 19 00 23 23 04 20 9.3 3.2 34 1919-2139 73 FRI SEP 17 18 33 19 11 19 37 14 46 02 33 04 56 05 22 06 00 19 03 23 27 04 24 9.3 2.4 25 2009-1832 62 SAT SEP 18 18 33 19 10 19 36 15 26 03 24 04 57 05 22 06 00 19 06 23 31 04 29 9.3 1.5 16 2057-1440 51 SUN SEP 19 18 32 19 09 19 35 16 02 04 13 04 57 05 23 06 00 19 09 23 35 04 33 9.4 0.7 7 2142-1015 41 MON SEP 20 18 31 19 08 19 34 16 36 05 01 04 57 05 23 06 00 19 12 23 39 04 37 9.4 0.0 0 2227-0528 31 TUE SEP 21 18 30 19 07 19 33 17 09 05 48 04 57 05 23 06 01 19 15 23 43 04 41 9.4 0.0 0 2310-0029 22 WED SEP 22 18 29 19 06 19 32 17 42 06 37 04 58 05 23 06 01 19 18 23 47 04 45 9.4 0.0 0 2354 0432 15 THU SEP 23 18 28 19 05 19 31 18 16 04 58 05 23 06 01 19 21 23 51 04 49 9.5 0.0 0 0039 0923 16 FRI SEP 24 18 27 19 05 19 30 18 51 04 58 05 24 06 01 19 24 23 55 04 53 9.5 0.0 0 0126 1354 23 SAT SEP 25 18 26 19 04 19 29 19 29 04 58 05 24 06 01 19 27 23 58 04 57 9.5 0.0 0 0215 1753 32 SUN SEP 26 18 25 19 03 19 28 20 11 04 59 05 24 06 02 19 30 00 02 05 02 9.5 0.7 7 0306 2105 43 MON SEP 27 18 24 19 02 19 27 20 58 04 59 05 24 06 02 19 33 00 06 05 06 9.5 1.5 15 0400 2318 54 TUE SEP 28 18 23 19 01 19 26 21 49 04 59 05 25 06 02 19 36 00 10 05 10 9.6 2.4 24 0457 2418 66 WED SEP 29 18 23 19 00 19 26 22 45 04 59 05 25 06 02 19 40 00 14 05 14 9.6 3.3 34 0554 2358 78 THU SEP 30 18 22 18 59 19 25 23 45 05 00 05 25 06 03 19 42 00 18 05 19 9.6 4.3 45 0650 2202 90 ONE LINE REFERS TO EVENING DATE LAST QUARTER Sep 01 17:22 UT AND FOLLOWING MORNING. NEW MOON Sep 08 10:29 UT All dates and times are zone HST FIRST QUARTER Sep 15 05:48 UT in upper table (except sid time). FULL MOON Sep 23 09:18 UT