KECK OBSERVATORY CALENDAR FOR 2012 -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 2012 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 SEP 01 18 47 19 25 19 52 19 11 04 52 05 18 05 57 18 17 22 26 03 19 9.0 0.0 0 0003 0432 28 SUN SEP 02 18 46 19 24 19 51 19 50 04 52 05 19 05 57 18 20 22 30 03 23 9.0 0.0 0 0051 0854 36 MON SEP 03 18 45 19 23 19 50 20 28 04 53 05 19 05 57 18 23 22 34 03 28 9.0 0.6 6 0139 1246 45 TUE SEP 04 18 44 19 22 19 49 21 08 04 53 05 19 05 57 18 26 22 38 03 32 9.1 1.3 14 0228 1600 55 WED SEP 05 18 43 19 21 19 48 21 50 04 53 05 19 05 57 18 29 22 42 03 35 9.1 2.0 22 0317 1829 65 THU SEP 06 18 43 19 21 19 47 22 34 04 54 05 20 05 58 18 32 22 46 03 40 9.1 2.8 30 0407 2008 75 FRI SEP 07 18 42 19 20 19 46 23 20 04 54 05 20 05 58 18 35 22 50 03 44 9.1 3.6 39 0457 2050 85 SAT SEP 08 18 41 19 19 19 45 00 09 04 54 05 20 05 58 18 38 22 53 03 48 9.2 4.4 48 0549 2040 >90 SUN SEP 09 18 40 19 18 19 44 01 01 14 01 04 54 05 20 05 58 18 41 22 57 03 52 9.2 5.3 57 0640 1930 >90 MON SEP 10 18 39 19 17 19 43 01 54 14 47 04 55 05 21 05 59 18 44 23 01 03 57 9.2 6.2 67 0731 1723 >90 TUE SEP 11 18 38 19 16 19 42 02 48 15 31 04 55 05 21 05 59 18 47 23 05 04 01 9.2 7.1 77 0822 1423 >90 WED SEP 12 18 37 19 15 19 41 03 44 16 14 04 55 05 21 05 59 18 50 23 09 04 05 9.2 8.1 87 0913 1037 >90 THU SEP 13 18 36 19 14 19 40 04 40 16 56 04 56 05 21 05 59 18 52 23 13 04 10 9.3 9.0 97 1003 0614 >90 FRI SEP 14 18 35 19 13 19 39 05 38 17 38 04 56 05 22 05 59 18 55 23 17 04 14 9.3 9.3 100 1054 0125 >90 SAT SEP 15 18 34 19 12 19 38 06 36 18 20 04 56 05 22 06 00 18 58 23 21 04 18 9.3 9.3 100 1146-0336 >90 SUN SEP 16 18 33 19 11 19 37 19 04 04 56 05 22 06 00 19 01 23 25 04 22 9.3 9.3 100 1240-0831 >90 MON SEP 17 18 33 19 10 19 36 19 50 04 57 05 22 06 00 19 04 23 29 04 27 9.3 9.1 97 1335-1301 >90 TUE SEP 18 18 32 19 09 19 35 20 40 04 57 05 23 06 00 19 07 23 33 04 31 9.4 8.3 88 1432-1648 >90 WED SEP 19 18 31 19 08 19 34 21 33 04 57 05 23 06 00 19 10 23 37 04 35 9.4 7.4 78 1532-1934 >90 THU SEP 20 18 30 19 07 19 33 22 29 04 57 05 23 06 01 19 13 23 41 04 39 9.4 6.5 68 1632-2106 >90 FRI SEP 21 18 29 19 06 19 32 23 28 04 58 05 23 06 01 19 16 23 45 04 44 9.4 5.5 58 1733-2118 >90 SAT SEP 22 18 28 19 05 19 31 00 28 04 58 05 23 06 01 19 19 23 49 04 48 9.5 4.5 47 1833-2006 87 SUN SEP 23 18 27 19 05 19 30 01 28 04 58 05 24 06 01 19 22 23 53 04 51 9.5 3.5 36 1930-1756 75 MON SEP 24 18 26 19 04 19 29 14 25 02 26 04 58 05 24 06 01 19 25 23 57 04 55 9.5 2.5 26 2025-1440 62 TUE SEP 25 18 25 19 03 19 28 15 10 03 22 04 59 05 24 06 02 19 28 00 01 05 00 9.5 1.6 16 2118-1042 50 WED SEP 26 18 24 19 02 19 27 15 51 04 16 04 59 05 24 06 02 19 31 00 04 05 04 9.5 0.7 7 2209-0615 39 THU SEP 27 18 23 19 01 19 26 16 31 05 09 04 59 05 25 06 02 19 34 00 08 05 08 9.6 0.0 0 2258-0136 28 FRI SEP 28 18 23 19 00 19 26 17 09 06 01 04 59 05 25 06 02 19 38 00 12 05 12 9.6 0.0 0 2346 0304 18 SAT SEP 29 18 22 18 59 19 25 17 47 06 53 05 00 05 25 06 03 19 41 00 16 05 17 9.6 0.0 0 0034 0730 13 SUN SEP 30 18 21 18 58 19 24 18 25 05 00 05 25 06 03 19 43 00 20 05 21 9.6 0.0 0 0122 1131 17 ONE LINE REFERS TO EVENING DATE LAST QUARTER Sep 08 13:15 UT AND FOLLOWING MORNING. NEW MOON Sep 16 02:09 UT All dates and times are zone HST FIRST QUARTER Sep 22 19:41 UT in upper table (except sid time). FULL MOON Sep 30 03:17 UT