KECK OBSERVATORY CALENDAR FOR 2013 -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 2013 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 MAY 01 18 55 19 35 20 03 00 39 04 35 05 03 05 42 10 22 14 20 18 56 8.5 4.6 53 2053-1234 >90 THU MAY 02 18 56 19 36 20 03 01 24 04 34 05 02 05 42 10 26 14 24 18 59 8.5 5.4 62 2146-0827 >90 FRI MAY 03 18 56 19 36 20 04 02 05 04 34 05 01 05 41 10 31 14 28 19 03 8.5 6.0 70 2237-0403 >90 SAT MAY 04 18 56 19 36 20 04 02 45 14 42 04 33 05 01 05 41 10 35 14 32 19 06 8.5 6.7 78 2326 0026 >90 SUN MAY 05 18 57 19 37 20 05 03 24 15 35 04 32 05 00 05 40 10 40 14 36 19 09 8.4 7.3 86 0014 0447 >90 MON MAY 06 18 57 19 37 20 05 04 04 16 27 04 31 04 59 05 40 10 44 14 40 19 11 8.4 8.0 94 0102 0849 >90 TUE MAY 07 18 58 19 38 20 06 04 44 17 20 04 31 04 59 05 39 10 49 14 44 19 15 8.4 8.4 100 0150 1224 >90 WED MAY 08 18 58 19 38 20 06 05 26 18 12 04 30 04 58 05 39 10 53 14 48 19 18 8.4 8.4 100 0239 1522 >90 THU MAY 09 18 58 19 39 20 07 06 10 19 04 04 29 04 58 05 38 10 58 14 52 19 21 8.4 8.4 100 0328 1737 >90 FRI MAY 10 18 59 19 39 20 08 06 56 19 55 04 29 04 57 05 38 11 03 14 55 19 25 8.3 8.3 100 0418 1903 >90 SAT MAY 11 18 59 19 40 20 08 20 44 04 28 04 57 05 37 11 07 14 59 19 28 8.3 7.7 92 0508 1937 >90 SUN MAY 12 19 00 19 40 20 09 21 32 04 28 04 56 05 37 11 12 15 03 19 32 8.3 6.9 83 0557 1918 >90 MON MAY 13 19 00 19 41 20 09 22 17 04 27 04 55 05 36 11 16 15 07 19 35 8.3 6.2 74 0647 1808 >90 TUE MAY 14 19 00 19 41 20 10 23 00 04 26 04 55 05 36 11 21 15 11 19 38 8.3 5.4 65 0735 1610 >90 WED MAY 15 19 01 19 42 20 10 23 41 04 26 04 54 05 35 11 25 15 15 19 42 8.3 4.8 57 0823 1328 >90 THU MAY 16 19 01 19 42 20 11 00 21 04 25 04 54 05 35 11 30 15 19 19 45 8.2 4.1 49 0912 1001 88 FRI MAY 17 19 02 19 43 20 12 00 59 04 25 04 54 05 35 11 34 15 23 19 49 8.2 3.4 41 0959 0615 80 SAT MAY 18 19 02 19 43 20 12 01 38 04 24 04 53 05 34 11 38 15 27 19 52 8.2 2.8 33 1047 0200 71 SUN MAY 19 19 03 19 44 20 13 02 18 04 24 04 53 05 34 11 43 15 31 19 56 8.2 2.1 25 1136-0232 62 MON MAY 20 19 03 19 44 20 13 14 33 03 00 04 23 04 52 05 34 11 47 15 35 19 59 8.2 1.4 16 1227-0707 53 TUE MAY 21 19 03 19 45 20 14 15 31 03 45 04 23 04 52 05 33 11 52 15 39 20 03 8.1 0.6 7 1322-1132 46 WED MAY 22 19 04 19 45 20 14 16 32 04 35 04 23 04 52 05 33 11 56 15 43 20 07 8.1 0.0 0 1420-1526 41 THU MAY 23 19 04 19 46 20 15 17 35 05 30 04 22 04 51 05 33 12 01 15 47 20 09 8.1 0.0 0 1521-1829 39 FRI MAY 24 19 05 19 46 20 15 18 40 06 30 04 22 04 51 05 33 12 05 15 51 20 13 8.1 0.0 0 1625-2020 41 SAT MAY 25 19 05 19 47 20 16 19 44 04 21 04 51 05 32 12 10 15 55 20 16 8.1 0.0 0 1731-2045 47 SUN MAY 26 19 06 19 47 20 17 20 45 04 21 04 50 05 32 12 15 15 59 20 20 8.1 0.5 5 1835-1940 55 MON MAY 27 19 06 19 48 20 17 21 42 04 21 04 50 05 32 12 19 16 03 20 24 8.1 1.4 17 1938-1716 65 TUE MAY 28 19 06 19 48 20 18 22 34 04 20 04 50 05 32 12 24 16 06 20 27 8.0 2.3 28 2037-1350 75 WED MAY 29 19 07 19 49 20 18 23 21 04 20 04 50 05 32 12 28 16 10 20 31 8.0 3.1 37 2132-0938 85 THU MAY 30 19 07 19 49 20 19 00 05 04 20 04 49 05 31 12 33 16 14 20 35 8.0 3.8 46 2225-0513 >90 FRI MAY 31 19 08 19 50 20 19 00 46 04 20 04 49 05 31 12 37 16 18 20 39 8.0 4.4 55 2315-0039 >90 ONE LINE REFERS TO EVENING DATE LAST QUARTER May 02 11:16 UT AND FOLLOWING MORNING. NEW MOON May 10 00:27 UT All dates and times are zone HST FIRST QUARTER May 18 04:36 UT in upper table (except sid time). FULL MOON May 25 04:25 UT LAST QUARTER May 31 18:59 UT