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 SUN MAY 01 18 55 19 35 20 03 05 09 17 56 04 35 05 03 05 42 10 20 14 18 18 54 8.5 8.5 100 0154 1525 >90 MON MAY 02 18 56 19 36 20 03 05 51 18 48 04 34 05 02 05 42 10 24 14 22 18 57 8.5 8.5 100 0242 1838 >90 TUE MAY 03 18 56 19 36 20 04 06 36 19 41 04 34 05 01 05 41 10 29 14 26 19 01 8.5 8.5 100 0332 2102 >90 WED MAY 04 18 56 19 36 20 04 20 35 04 33 05 01 05 41 10 33 14 30 19 04 8.5 8.0 93 0425 2229 >90 THU MAY 05 18 57 19 37 20 05 21 29 04 32 05 00 05 40 10 38 14 34 19 06 8.4 7.0 83 0519 2249 >90 FRI MAY 06 18 57 19 37 20 05 22 20 04 31 04 59 05 40 10 42 14 38 19 09 8.4 6.2 73 0614 2158 >90 SAT MAY 07 18 58 19 38 20 06 23 10 04 31 04 59 05 39 10 47 14 42 19 13 8.4 5.4 63 0709 1955 >90 SUN MAY 08 18 58 19 38 20 06 23 56 04 30 04 58 05 39 10 51 14 46 19 16 8.4 4.6 54 0803 1644 >90 MON MAY 09 18 58 19 39 20 07 00 40 04 29 04 58 05 38 10 56 14 50 19 19 8.4 3.8 45 0857 1231 84 TUE MAY 10 18 59 19 39 20 08 01 22 04 29 04 57 05 38 11 01 14 53 19 23 8.3 3.1 37 0950 0736 74 WED MAY 11 18 59 19 40 20 08 02 04 04 28 04 57 05 37 11 05 14 57 19 26 8.3 2.4 28 1042 0205 65 THU MAY 12 19 00 19 40 20 09 14 09 02 46 04 28 04 56 05 37 11 10 15 01 19 30 8.3 1.7 20 1136-0341 56 FRI MAY 13 19 00 19 41 20 09 15 09 03 30 04 27 04 55 05 36 11 14 15 05 19 33 8.3 0.9 11 1231-0923 48 SAT MAY 14 19 00 19 41 20 10 16 11 04 17 04 26 04 55 05 36 11 19 15 09 19 36 8.3 0.2 1 1328-1438 42 SUN MAY 15 19 01 19 42 20 10 17 16 05 09 04 26 04 54 05 35 11 23 15 13 19 40 8.3 0.0 0 1428-1901 40 MON MAY 16 19 01 19 42 20 11 18 20 06 04 04 25 04 54 05 35 11 27 15 17 19 43 8.2 0.0 0 1530-2210 42 TUE MAY 17 19 02 19 43 20 12 19 25 04 25 04 54 05 35 11 32 15 21 19 47 8.2 0.0 0 1634-2348 47 WED MAY 18 19 02 19 43 20 12 20 26 04 24 04 53 05 34 11 36 15 25 19 50 8.2 0.2 2 1736-2352 54 THU MAY 19 19 03 19 44 20 13 21 22 04 24 04 53 05 34 11 41 15 29 19 54 8.2 1.1 14 1836-2228 62 FRI MAY 20 19 03 19 44 20 13 22 12 04 23 04 52 05 34 11 45 15 33 19 57 8.2 2.0 24 1933-1952 71 SAT MAY 21 19 03 19 45 20 14 22 56 04 23 04 52 05 33 11 50 15 37 20 01 8.1 2.7 33 2025-1618 80 SUN MAY 22 19 04 19 45 20 14 23 37 04 23 04 52 05 33 11 54 15 41 20 04 8.1 3.4 41 2113-1207 88 MON MAY 23 19 04 19 46 20 15 00 13 04 22 04 51 05 33 11 59 15 45 20 07 8.1 4.0 48 2201-0745 >90 TUE MAY 24 19 05 19 46 20 15 00 48 04 22 04 51 05 33 12 03 15 49 20 11 8.1 4.6 56 2245-0305 >90 WED MAY 25 19 05 19 47 20 16 01 22 04 21 04 51 05 32 12 08 15 53 20 14 8.1 5.1 63 2328 0137 >90 THU MAY 26 19 06 19 47 20 17 01 55 14 12 04 21 04 50 05 32 12 13 15 57 20 18 8.1 5.6 69 0012 0611 >90 FRI MAY 27 19 06 19 48 20 17 02 30 15 01 04 21 04 50 05 32 12 17 16 00 20 22 8.1 6.2 77 0056 1031 >90 SAT MAY 28 19 06 19 48 20 18 03 07 15 50 04 20 04 50 05 32 12 22 16 04 20 25 8.0 6.8 84 0142 1427 >90 SUN MAY 29 19 07 19 49 20 18 03 48 16 41 04 20 04 50 05 32 12 26 16 08 20 29 8.0 7.5 93 0229 1750 >90 MON MAY 30 19 07 19 49 20 19 04 32 17 34 04 20 04 49 05 31 12 31 16 12 20 33 8.0 8.0 100 0319 2027 >90 TUE MAY 31 19 08 19 50 20 19 05 21 18 29 04 20 04 49 05 31 12 35 16 16 20 37 8.0 8.0 100 0412 2209 >90 ONE LINE REFERS TO EVENING DATE NEW MOON May 03 06:52 UT AND FOLLOWING MORNING. FIRST QUARTER May 10 20:32 UT All dates and times are zone HST FULL MOON May 17 11:10 UT in upper table (except sid time). LAST QUARTER May 24 18:52 UT