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 THU AUG 01 19 10 19 50 20 19 02 22 15 22 04 38 05 06 05 47 16 41 20 23 01 01 8.3 6.0 72 0524 1931 >90 FRI AUG 02 19 09 19 50 20 18 03 11 16 10 04 39 05 07 05 47 16 44 20 27 01 06 8.4 6.9 82 0614 1901 >90 SAT AUG 03 19 09 19 49 20 17 04 01 16 55 04 39 05 07 05 48 16 47 20 31 01 10 8.4 7.7 92 0703 1741 >90 SUN AUG 04 19 08 19 48 20 17 04 51 17 38 04 40 05 08 05 48 16 51 20 35 01 15 8.4 8.4 100 0751 1535 >90 MON AUG 05 19 07 19 48 20 16 05 42 18 20 04 40 05 08 05 48 16 54 20 38 01 19 8.4 8.4 100 0839 1247 >90 TUE AUG 06 19 07 19 47 20 15 06 33 19 00 04 41 05 09 05 49 16 57 20 42 01 24 8.4 8.4 100 0925 0926 >90 WED AUG 07 19 06 19 46 20 14 19 38 04 41 05 09 05 49 17 00 20 46 01 28 8.4 8.4 100 1012 0537 >90 THU AUG 08 19 06 19 46 20 14 20 16 04 42 05 09 05 50 17 04 20 50 01 33 8.5 8.4 99 1059 0131 >90 FRI AUG 09 19 05 19 45 20 13 20 55 04 42 05 10 05 50 17 07 20 54 01 37 8.5 7.8 91 1146-0246 >90 SAT AUG 10 19 05 19 44 20 12 21 34 04 43 05 10 05 50 17 10 20 58 01 42 8.5 7.1 83 1234-0700 >90 SUN AUG 11 19 04 19 44 20 11 22 16 04 43 05 11 05 51 17 13 21 02 01 46 8.5 6.5 75 1324-1102 >90 MON AUG 12 19 03 19 43 20 11 23 01 04 44 05 11 05 51 17 16 21 06 01 51 8.6 5.7 66 1417-1437 >90 TUE AUG 13 19 03 19 42 20 10 23 50 04 44 05 12 05 51 17 19 21 10 01 55 8.6 4.9 57 1513-1732 >90 WED AUG 14 19 02 19 41 20 09 00 43 04 44 05 12 05 51 17 22 21 14 01 59 8.6 4.0 46 1612-1928 84 THU AUG 15 19 01 19 41 20 08 01 41 04 45 05 12 05 52 17 25 21 18 02 04 8.6 3.1 35 1712-2022 72 FRI AUG 16 19 01 19 40 20 07 14 53 02 42 04 45 05 13 05 52 17 28 21 22 02 08 8.6 2.0 23 1814-1953 61 SAT AUG 17 19 00 19 39 20 06 15 50 03 46 04 46 05 13 05 52 17 31 21 26 02 13 8.7 1.0 11 1917-1804 49 SUN AUG 18 18 59 19 38 20 06 16 45 04 49 04 46 05 13 05 53 17 35 21 30 02 17 8.7 0.0 0 2018-1502 39 MON AUG 19 18 58 19 38 20 05 17 37 05 52 04 47 05 14 05 53 17 38 21 34 02 21 8.7 0.0 0 2117-1102 31 TUE AUG 20 18 58 19 37 20 04 18 25 06 53 04 47 05 14 05 53 17 41 21 38 02 25 8.7 0.0 0 2214-0626 28 WED AUG 21 18 57 19 36 20 03 19 10 04 48 05 15 05 54 17 44 21 42 02 30 8.8 0.0 0 2309-0133 30 THU AUG 22 18 56 19 35 20 02 19 53 04 48 05 15 05 54 17 47 21 46 02 34 8.8 0.0 0 0003 0315 37 FRI AUG 23 18 55 19 34 20 01 20 36 04 48 05 15 05 54 17 50 21 49 02 38 8.8 0.6 6 0055 0743 46 SAT AUG 24 18 54 19 33 20 00 21 18 04 49 05 16 05 54 17 53 21 53 02 43 8.8 1.3 14 0147 1137 56 SUN AUG 25 18 54 19 32 19 59 22 01 04 49 05 16 05 55 17 56 21 57 02 47 8.8 2.0 23 0238 1448 67 MON AUG 26 18 53 19 32 19 58 22 45 04 49 05 16 05 55 17 59 22 01 02 51 8.8 2.8 31 0328 1711 77 TUE AUG 27 18 52 19 31 19 57 23 30 04 50 05 16 05 55 18 02 22 05 02 56 8.9 3.5 39 0419 1840 87 WED AUG 28 18 51 19 30 19 56 00 17 04 50 05 17 05 55 18 05 22 09 03 00 8.9 4.4 48 0510 1923 >90 THU AUG 29 18 50 19 29 19 55 01 06 14 04 04 51 05 17 05 56 18 07 22 13 03 05 8.9 5.2 58 0600 1909 >90 FRI AUG 30 18 50 19 28 19 54 01 55 14 51 04 51 05 17 05 56 18 10 22 17 03 09 9.0 6.0 67 0650 1804 >90 SAT AUG 31 18 49 19 27 19 53 02 45 15 35 04 51 05 18 05 56 18 13 22 21 03 13 9.0 6.9 76 0738 1612 >90 ONE LINE REFERS TO EVENING DATE NEW MOON Aug 06 21:53 UT AND FOLLOWING MORNING. FIRST QUARTER Aug 14 10:56 UT All dates and times are zone HST FULL MOON Aug 21 01:45 UT in upper table (except sid time). LAST QUARTER Aug 28 09:36 UT