KECK OBSERVATORY CALENDAR FOR 2011 -NAUTICAL (computed for altitude 4160.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) Zenith 2011 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 12 12 h h % h m d m deg THU SEP 01 18 48 19 26 19 53 21 38 04 52 05 18 05 56 17 48 22 23 03 42 9.9 7.7 77 1420-1751 >90 FRI SEP 02 18 47 19 25 19 52 22 30 04 52 05 18 05 57 17 51 22 27 03 46 9.9 6.8 68 1518-2101 >90 SAT SEP 03 18 46 19 24 19 51 23 25 04 52 05 19 05 57 17 54 22 31 03 51 9.9 5.9 59 1618-2253 >90 SUN SEP 04 18 45 19 23 19 50 00 22 04 53 05 19 05 57 17 57 22 35 03 55 9.9 4.9 49 1719-2314 89 MON SEP 05 18 44 19 22 19 49 01 19 04 53 05 19 05 57 18 00 22 39 03 59 9.9 4.0 40 1815-2229 77 TUE SEP 06 18 43 19 21 19 48 14 33 02 16 04 53 05 19 05 57 18 03 22 43 04 02 10.0 3.0 30 1911-2030 66 WED SEP 07 18 43 19 21 19 47 15 19 03 11 04 54 05 20 05 58 18 07 22 47 04 07 10.0 2.2 21 2004-1727 55 THU SEP 08 18 42 19 20 19 46 16 02 04 04 04 54 05 20 05 58 18 10 22 51 04 11 10.0 1.3 12 2054-1339 44 FRI SEP 09 18 41 19 19 19 45 16 41 04 56 04 54 05 20 05 58 18 13 22 54 04 15 10.0 0.4 3 2142-0918 34 SAT SEP 10 18 40 19 18 19 44 17 17 05 45 04 54 05 20 05 58 18 16 22 58 04 19 10.0 0.0 0 2229-0438 26 SUN SEP 11 18 39 19 17 19 43 17 52 06 34 04 55 05 21 05 59 18 19 23 02 04 24 10.1 0.0 0 2314 0008 20 MON SEP 12 18 38 19 16 19 42 18 26 04 55 05 21 05 59 18 22 23 06 04 28 10.1 0.0 0 2359 0451 20 TUE SEP 13 18 37 19 15 19 41 19 01 04 55 05 21 05 59 18 24 23 10 04 32 10.1 0.0 0 0044 0919 25 WED SEP 14 18 36 19 14 19 40 19 37 04 56 05 21 05 59 18 27 23 14 04 36 10.1 0.4 3 0130 1323 33 THU SEP 15 18 35 19 13 19 39 20 15 04 56 05 22 05 59 18 30 23 18 04 41 10.1 1.0 10 0217 1653 43 FRI SEP 16 18 34 19 12 19 38 20 56 04 56 05 22 06 00 18 33 23 22 04 45 10.2 1.7 17 0306 1941 53 SAT SEP 17 18 33 19 11 19 37 21 39 04 56 05 22 06 00 18 36 23 26 04 49 10.2 2.5 24 0357 2137 63 SUN SEP 18 18 33 19 10 19 36 22 27 04 57 05 22 06 00 18 39 23 30 04 53 10.2 3.3 32 0450 2233 74 MON SEP 19 18 32 19 09 19 35 23 19 04 57 05 23 06 00 18 42 23 34 04 58 10.2 4.2 40 0543 2221 85 TUE SEP 20 18 31 19 08 19 34 00 14 04 57 05 23 06 00 18 45 23 38 05 02 10.2 5.1 49 0638 2106 >90 WED SEP 21 18 30 19 07 19 33 01 11 14 07 04 57 05 23 06 01 18 48 23 42 05 06 10.3 6.1 59 0733 1838 >90 THU SEP 22 18 29 19 06 19 32 02 10 14 54 04 58 05 23 06 01 18 51 23 46 05 10 10.3 7.1 68 0827 1505 >90 FRI SEP 23 18 28 19 05 19 31 03 11 15 39 04 58 05 23 06 01 18 54 23 50 05 14 10.3 8.1 78 0921 1036 >90 SAT SEP 24 18 27 19 05 19 30 04 12 16 24 04 58 05 24 06 01 18 58 23 54 05 18 10.3 9.1 88 1015 0524 >90 SUN SEP 25 18 26 19 04 19 29 05 14 17 08 04 58 05 24 06 01 19 01 23 58 05 22 10.3 10.2 98 1109-0014 >90 MON SEP 26 18 25 19 03 19 28 06 18 17 52 04 59 05 24 06 02 19 04 00 01 05 26 10.4 10.4 100 1204-0557 >90 TUE SEP 27 18 24 19 02 19 27 18 38 04 59 05 24 06 02 19 07 00 05 05 30 10.4 10.4 100 1301-1123 >90 WED SEP 28 18 23 19 01 19 26 19 28 04 59 05 25 06 02 19 10 00 09 05 35 10.4 9.9 95 1359-1606 >90 THU SEP 29 18 23 19 00 19 26 20 20 04 59 05 25 06 02 19 12 00 13 05 39 10.4 9.1 87 1459-1946 >90 FRI SEP 30 18 22 18 59 19 25 21 16 05 00 05 25 06 03 19 15 00 17 05 43 10.4 8.2 78 1600-2205 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Sep 04 17:38 UT AND FOLLOWING MORNING. FULL MOON Sep 12 09:25 UT All dates and times are zone HST LAST QUARTER Sep 20 13:39 UT in upper table (except sid time). NEW MOON Sep 27 11:09 UT