KECK OBSERVATORY CALENDAR FOR 2015 -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 2015 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 TUE SEP 01 18 48 19 26 19 53 21 05 04 52 05 18 05 56 18 15 22 23 03 16 9.0 1.2 13 0200 0901 54 WED SEP 02 18 47 19 25 19 52 21 54 04 52 05 18 05 57 18 18 22 27 03 20 9.0 2.0 22 0258 1235 65 THU SEP 03 18 46 19 24 19 51 22 44 04 52 05 19 05 57 18 21 22 31 03 24 9.0 2.9 31 0354 1516 77 FRI SEP 04 18 45 19 23 19 50 23 36 04 53 05 19 05 57 18 24 22 35 03 29 9.0 3.8 41 0450 1655 88 SAT SEP 05 18 44 19 22 19 49 00 27 04 53 05 19 05 57 18 27 22 39 03 33 9.1 4.6 51 0546 1744 >90 SUN SEP 06 18 43 19 21 19 48 01 20 14 10 04 53 05 19 05 57 18 30 22 43 03 37 9.1 5.5 60 0640 1730 >90 MON SEP 07 18 43 19 21 19 47 02 12 15 00 04 54 05 20 05 58 18 33 22 47 03 41 9.1 6.4 70 0732 1623 >90 TUE SEP 08 18 42 19 20 19 46 03 03 15 47 04 54 05 20 05 58 18 36 22 51 03 45 9.1 7.3 79 0822 1430 >90 WED SEP 09 18 41 19 19 19 45 03 54 16 30 04 54 05 20 05 58 18 39 22 55 03 49 9.2 8.2 89 0911 1159 >90 THU SEP 10 18 40 19 18 19 44 04 44 17 11 04 54 05 20 05 58 18 42 22 59 03 53 9.2 9.0 98 0958 0859 >90 FRI SEP 11 18 39 19 17 19 43 05 33 17 49 04 55 05 21 05 59 18 45 23 02 03 58 9.2 9.2 100 1043 0540 >90 SAT SEP 12 18 38 19 16 19 42 06 21 18 27 04 55 05 21 05 59 18 48 23 06 04 02 9.2 9.2 100 1128 0207 >90 SUN SEP 13 18 37 19 15 19 41 19 03 04 55 05 21 05 59 18 51 23 10 04 06 9.2 9.2 100 1213-0129 >90 MON SEP 14 18 36 19 14 19 40 19 40 04 56 05 21 05 59 18 54 23 14 04 11 9.3 9.3 100 1257-0504 >90 TUE SEP 15 18 35 19 13 19 39 20 17 04 56 05 22 05 59 18 57 23 18 04 15 9.3 8.7 93 1342-0828 >90 WED SEP 16 18 34 19 12 19 38 20 56 04 56 05 22 06 00 18 59 23 22 04 19 9.3 8.0 86 1428-1135 >90 THU SEP 17 18 33 19 11 19 37 21 38 04 56 05 22 06 00 19 02 23 26 04 23 9.3 7.3 78 1516-1417 >90 FRI SEP 18 18 32 19 10 19 36 22 21 04 57 05 22 06 00 19 05 23 30 04 28 9.3 6.6 70 1605-1625 >90 SAT SEP 19 18 32 19 09 19 35 23 08 04 57 05 23 06 00 19 08 23 34 04 32 9.4 5.8 62 1657-1751 >90 SUN SEP 20 18 31 19 08 19 34 23 59 04 57 05 23 06 00 19 11 23 38 04 36 9.4 5.0 52 1750-1827 >90 MON SEP 21 18 30 19 07 19 33 00 53 04 57 05 23 06 01 19 14 23 42 04 40 9.4 4.1 43 1846-1803 82 TUE SEP 22 18 29 19 06 19 32 01 50 04 58 05 23 06 01 19 17 23 46 04 45 9.4 3.1 33 1943-1645 70 WED SEP 23 18 28 19 05 19 31 14 45 02 49 04 58 05 23 06 01 19 20 23 50 04 49 9.5 2.2 22 2041-1420 58 THU SEP 24 18 27 19 05 19 30 15 36 03 51 04 58 05 24 06 01 19 23 23 54 04 53 9.5 1.1 11 2139-1058 45 FRI SEP 25 18 26 19 04 19 29 16 26 04 53 04 58 05 24 06 01 19 26 23 58 04 56 9.5 0.1 0 2238-0648 33 SAT SEP 26 18 25 19 03 19 28 17 15 05 57 04 59 05 24 06 02 19 29 00 02 05 01 9.5 0.0 0 2336-0209 23 SUN SEP 27 18 24 19 02 19 27 18 04 04 59 05 24 06 02 19 32 00 06 05 05 9.5 0.0 0 0035 0241 19 MON SEP 28 18 23 19 01 19 26 18 53 04 59 05 25 06 02 19 35 00 09 05 09 9.6 0.0 0 0135 0717 24 TUE SEP 29 18 23 19 00 19 26 19 43 04 59 05 25 06 02 19 39 00 13 05 13 9.6 0.3 2 0234 1119 35 WED SEP 30 18 22 18 59 19 25 20 35 05 00 05 25 06 03 19 42 00 17 05 18 9.6 1.2 12 0333 1430 47 ONE LINE REFERS TO EVENING DATE LAST QUARTER Sep 05 09:54 UT AND FOLLOWING MORNING. NEW MOON Sep 13 06:40 UT All dates and times are zone HST FIRST QUARTER Sep 21 08:59 UT in upper table (except sid time). FULL MOON Sep 28 02:52 UT