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 SAT JAN 01 18 05 18 45 19 12 05 22 15 58 05 39 06 06 06 46 01 36 06 25 12 05 10.4 10.2 97 1709-2411 >90 SUN JAN 02 18 06 18 46 19 13 06 15 16 54 05 39 06 06 06 46 01 41 06 29 12 09 10.4 10.4 100 1806-2331 >90 MON JAN 03 18 06 18 47 19 14 17 51 05 39 06 06 06 47 01 46 06 33 12 13 10.4 10.4 100 1900-2137 >90 TUE JAN 04 18 07 18 47 19 14 18 47 05 40 06 07 06 47 01 50 06 37 12 18 10.4 10.4 100 1952-1843 >90 WED JAN 05 18 07 18 48 19 15 19 41 05 40 06 07 06 47 01 55 06 41 12 22 10.4 10.0 95 2041-1501 >90 THU JAN 06 18 08 18 48 19 15 20 32 05 40 06 07 06 48 01 59 06 45 12 26 10.4 9.1 87 2128-1047 >90 FRI JAN 07 18 09 18 49 19 16 21 22 05 41 06 07 06 48 02 04 06 49 12 30 10.4 8.3 79 2212-0611 >90 SAT JAN 08 18 09 18 50 19 16 22 10 05 41 06 08 06 48 02 08 06 52 12 34 10.4 7.5 72 2256-0124 >90 SUN JAN 09 18 10 18 50 19 17 22 58 05 41 06 08 06 48 02 13 06 56 12 38 10.4 6.7 64 2338 0324 >90 MON JAN 10 18 11 18 51 19 18 23 46 05 41 06 08 06 48 02 18 07 00 12 42 10.4 5.9 56 0022 0806 >90 TUE JAN 11 18 11 18 51 19 18 00 36 05 42 06 08 06 48 02 22 07 04 12 47 10.4 5.1 49 0107 1229 85 WED JAN 12 18 12 18 52 19 19 01 27 05 42 06 09 06 49 02 26 07 08 12 51 10.4 4.2 40 0154 1634 74 THU JAN 13 18 12 18 53 19 19 02 21 05 42 06 09 06 49 02 30 07 12 12 55 10.4 3.3 32 0244 1959 63 FRI JAN 14 18 13 18 53 19 20 03 17 05 42 06 09 06 49 02 35 07 16 12 59 10.4 2.4 23 0338 2233 51 SAT JAN 15 18 14 18 54 19 20 14 08 04 14 05 42 06 09 06 49 02 39 07 20 13 03 10.4 1.5 14 0435 2400 38 SUN JAN 16 18 14 18 54 19 21 15 03 05 11 05 42 06 09 06 49 02 44 07 24 13 07 10.3 0.5 4 0534 2406 26 MON JAN 17 18 15 18 55 19 22 16 03 06 06 05 42 06 09 06 49 02 49 07 28 13 11 10.3 0.0 0 0636 2241 13 TUE JAN 18 18 16 18 55 19 22 17 07 06 58 05 43 06 09 06 49 02 53 07 32 13 16 10.3 0.0 0 0736 1947 01 WED JAN 19 18 16 18 56 19 23 18 11 05 43 06 09 06 49 02 58 07 36 13 20 10.3 0.0 0 0836 1533 15 THU JAN 20 18 17 18 57 19 23 19 15 05 43 06 09 06 49 03 02 07 40 13 24 10.3 0.0 0 0933 1019 29 FRI JAN 21 18 18 18 57 19 24 20 17 05 43 06 09 06 49 03 07 07 44 13 28 10.3 0.9 8 1029 0427 43 SAT JAN 22 18 18 18 58 19 24 21 18 05 43 06 09 06 49 03 11 07 48 13 32 10.3 1.9 18 1123-0138 57 SUN JAN 23 18 19 18 58 19 25 22 19 05 43 06 09 06 49 03 16 07 52 13 36 10.3 2.9 28 1217-0733 71 MON JAN 24 18 19 18 59 19 25 23 19 05 43 06 09 06 49 03 20 07 56 13 39 10.3 3.9 37 1311-1251 84 TUE JAN 25 18 20 18 59 19 26 00 19 05 43 06 09 06 48 03 25 07 59 13 43 10.3 4.9 47 1406-1728 >90 WED JAN 26 18 21 19 00 19 26 01 20 05 43 06 09 06 48 03 29 08 03 13 47 10.3 5.9 57 1503-2058 >90 THU JAN 27 18 21 19 01 19 27 02 19 05 42 06 09 06 48 03 34 08 07 13 50 10.2 6.9 66 1559-2314 >90 FRI JAN 28 18 22 19 01 19 27 03 16 05 42 06 09 06 48 03 38 08 11 13 54 10.2 7.8 76 1657-2412 >90 SAT JAN 29 18 22 19 02 19 28 04 10 14 48 05 42 06 08 06 48 03 43 08 15 13 58 10.2 8.7 85 1753-2350 >90 SUN JAN 30 18 23 19 02 19 28 04 59 15 44 05 42 06 08 06 47 03 46 08 19 14 02 10.2 9.5 92 1847-2216 >90 MON JAN 31 18 24 19 03 19 29 05 45 16 39 05 42 06 08 06 47 03 51 08 23 14 06 10.2 10.2 100 1939-1940 >90 ONE LINE REFERS TO EVENING DATE NEW MOON Jan 04 09:02 UT AND FOLLOWING MORNING. FIRST QUARTER Jan 12 11:32 UT All dates and times are zone HST FULL MOON Jan 19 21:21 UT in upper table (except sid time). LAST QUARTER Jan 26 12:58 UT