KECK OBSERVATORY CALENDAR FOR 2011 -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 2011 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 TUE FEB 01 18 24 19 03 19 29 06 25 17 33 05 42 06 08 06 47 03 55 08 27 14 10 10.2 10.2 100 2028-1613 >90 WED FEB 02 18 25 19 04 19 30 18 25 05 41 06 08 06 46 04 00 08 31 14 13 10.2 10.2 100 2115-1209 >90 THU FEB 03 18 25 19 04 19 30 19 16 05 41 06 07 06 46 04 04 08 35 14 17 10.2 10.2 100 2200-0740 >90 FRI FEB 04 18 26 19 05 19 31 20 04 05 41 06 07 06 46 04 09 08 39 14 21 10.2 9.6 94 2244-0258 >90 SAT FEB 05 18 26 19 05 19 31 20 52 05 41 06 07 06 45 04 13 08 43 14 25 10.2 8.8 86 2326 0149 >90 SUN FEB 06 18 27 19 06 19 32 21 40 05 40 06 06 06 45 04 18 08 47 14 28 10.1 8.0 78 0009 0630 >90 MON FEB 07 18 27 19 06 19 32 22 29 05 40 06 06 06 45 04 22 08 51 14 32 10.1 7.2 70 0053 1059 >90 TUE FEB 08 18 28 19 07 19 32 23 19 05 40 06 06 06 44 04 26 08 55 14 36 10.1 6.3 62 0139 1505 >90 WED FEB 09 18 28 19 07 19 33 00 11 05 39 06 05 06 44 04 31 08 59 14 39 10.1 5.5 54 0230 1820 >90 THU FEB 10 18 29 19 07 19 33 01 04 05 39 06 05 06 43 04 35 09 03 14 42 10.1 4.6 45 0318 2125 80 FRI FEB 11 18 29 19 08 19 34 02 00 05 39 06 04 06 43 04 40 09 07 14 46 10.1 3.7 36 0412 2317 68 SAT FEB 12 18 30 19 08 19 34 02 55 05 38 06 04 06 42 04 44 09 10 14 49 10.1 2.7 26 0508 2358 56 SUN FEB 13 18 30 19 09 19 35 03 50 05 38 06 04 06 42 04 49 09 14 14 53 10.0 1.8 17 0607 2316 43 MON FEB 14 18 31 19 09 19 35 14 45 04 43 05 37 06 03 06 41 04 53 09 18 14 56 10.0 0.9 8 0707 2107 31 TUE FEB 15 18 31 19 10 19 35 15 49 05 33 05 37 06 03 06 41 04 57 09 22 15 00 10.0 0.1 0 0807 1733 18 WED FEB 16 18 32 19 10 19 36 16 53 06 20 05 36 06 02 06 40 05 01 09 26 15 03 10.0 0.0 0 0906 1246 09 THU FEB 17 18 32 19 10 19 36 17 57 05 36 06 01 06 40 05 05 09 30 15 07 10.0 0.0 0 1004 0706 15 FRI FEB 18 18 33 19 11 19 36 19 01 05 35 06 01 06 39 05 09 09 34 15 10 10.0 0.0 0 1100 0056 28 SAT FEB 19 18 33 19 11 19 37 20 04 05 35 06 00 06 38 05 14 09 38 15 14 10.0 0.5 4 1156-0516 42 SUN FEB 20 18 33 19 11 19 37 21 06 05 34 06 00 06 38 05 18 09 42 15 17 9.9 1.5 14 1252-1106 56 MON FEB 21 18 34 19 12 19 38 22 09 05 34 05 59 06 37 05 23 09 46 15 21 9.9 2.5 25 1349-1609 70 TUE FEB 22 18 34 19 12 19 38 23 12 05 33 05 59 06 36 05 27 09 50 15 24 9.9 3.6 35 1447-2002 83 WED FEB 23 18 35 19 13 19 38 00 12 05 32 05 58 06 36 05 31 09 54 15 27 9.9 4.6 46 1546-2245 >90 THU FEB 24 18 35 19 13 19 39 01 11 05 32 05 57 06 35 05 36 09 58 15 31 9.9 5.5 55 1644-2402 >90 FRI FEB 25 18 35 19 13 19 39 02 06 05 31 05 57 06 34 05 40 10 02 15 34 9.9 6.5 65 1741-2359 >90 SAT FEB 26 18 36 19 14 19 39 02 57 05 30 05 56 06 34 05 44 10 06 15 37 9.9 7.3 74 1836-2240 >90 SUN FEB 27 18 36 19 14 19 40 03 43 14 35 05 30 05 55 06 33 05 49 10 10 15 40 9.8 8.1 81 1928-2019 >90 MON FEB 28 18 37 19 14 19 40 04 25 15 29 05 29 05 55 06 32 05 53 10 14 15 43 9.8 8.8 89 2018-1705 >90 ONE LINE REFERS TO EVENING DATE NEW MOON Feb 03 02:29 UT AND FOLLOWING MORNING. FIRST QUARTER Feb 11 07:19 UT All dates and times are zone HST FULL MOON Feb 18 08:34 UT in upper table (except sid time). LAST QUARTER Feb 24 23:26 UT