KECK OBSERVATORY CALENDAR FOR 2018 -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 2018 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 FEB 01 18 24 19 03 19 29 19 42 05 42 06 08 06 47 03 57 08 28 14 11 10.2 0.2 2 1048 1002 35 FRI FEB 02 18 25 19 04 19 30 20 42 05 41 06 08 06 46 04 01 08 32 14 14 10.2 1.2 11 1143 0528 48 SAT FEB 03 18 25 19 04 19 30 21 39 05 41 06 07 06 46 04 05 08 36 14 18 10.2 2.1 21 1235 0046 61 SUN FEB 04 18 26 19 05 19 31 22 34 05 41 06 07 06 46 04 10 08 40 14 22 10.2 3.1 30 1325-0349 74 MON FEB 05 18 26 19 05 19 31 23 27 05 41 06 07 06 45 04 14 08 44 14 26 10.2 3.9 38 1414-0758 86 TUE FEB 06 18 27 19 06 19 32 00 19 05 40 06 06 06 45 04 19 08 48 14 29 10.1 4.8 47 1503-1147 >90 WED FEB 07 18 27 19 06 19 32 01 10 05 40 06 06 06 45 04 23 08 52 14 33 10.1 5.6 55 1551-1456 >90 THU FEB 08 18 28 19 07 19 32 02 00 05 40 06 06 06 44 04 27 08 56 14 37 10.1 6.5 63 1640-1724 >90 FRI FEB 09 18 28 19 07 19 33 02 50 05 39 06 05 06 44 04 32 09 00 14 40 10.1 7.3 72 1729-1905 >90 SAT FEB 10 18 29 19 07 19 33 03 39 14 35 05 39 06 05 06 43 04 36 09 04 14 44 10.1 8.1 80 1818-1957 >90 SUN FEB 11 18 29 19 08 19 34 04 27 15 22 05 39 06 04 06 43 04 41 09 08 14 48 10.1 8.9 88 1908-1958 >90 MON FEB 12 18 30 19 08 19 34 05 13 16 11 05 38 06 04 06 42 04 45 09 12 14 51 10.1 9.6 95 1958-1907 >90 TUE FEB 13 18 30 19 09 19 35 05 57 17 01 05 38 06 04 06 42 04 50 09 16 14 55 10.0 10.0 100 2047-1727 >90 WED FEB 14 18 31 19 09 19 35 06 40 17 52 05 37 06 03 06 41 04 54 09 20 14 57 10.0 10.0 100 2136-1500 >90 THU FEB 15 18 31 19 10 19 35 18 43 05 37 06 03 06 41 04 58 09 23 15 01 10.0 10.0 100 2224-1152 >90 FRI FEB 16 18 32 19 10 19 36 19 35 05 36 06 02 06 40 05 03 09 27 15 04 10.0 10.0 100 2312-0811 >90 SAT FEB 17 18 32 19 10 19 36 20 26 05 36 06 01 06 40 05 07 09 31 15 08 10.0 9.2 91 0000-0405 >90 SUN FEB 18 18 33 19 11 19 36 21 19 05 35 06 01 06 39 05 11 09 35 15 11 10.0 8.3 82 0048 0016 >90 MON FEB 19 18 33 19 11 19 37 22 13 05 35 06 00 06 38 05 16 09 39 15 15 10.0 7.4 73 0136 0440 >90 TUE FEB 20 18 33 19 11 19 37 23 08 05 34 06 00 06 38 05 19 09 43 15 18 9.9 6.4 64 0227 0856 >90 WED FEB 21 18 34 19 12 19 38 00 05 05 34 05 59 06 37 05 24 09 47 15 22 9.9 5.5 55 0325 1223 >90 THU FEB 22 18 34 19 12 19 38 01 04 05 33 05 59 06 36 05 28 09 51 15 25 9.9 4.5 45 0415 1606 79 FRI FEB 23 18 35 19 13 19 38 02 05 05 32 05 58 06 36 05 32 09 55 15 28 9.9 3.5 34 0514 1832 66 SAT FEB 24 18 35 19 13 19 39 03 06 05 32 05 57 06 35 05 37 09 59 15 32 9.9 2.4 24 0614 1949 53 SUN FEB 25 18 35 19 13 19 39 14 12 04 06 05 31 05 57 06 34 05 41 10 03 15 35 9.9 1.4 14 0717 1947 39 MON FEB 26 18 36 19 14 19 39 15 14 05 03 05 30 05 56 06 34 05 45 10 07 15 38 9.9 0.4 4 0819 1822 25 TUE FEB 27 18 36 19 14 19 40 16 18 05 56 05 30 05 55 06 33 05 50 10 11 15 42 9.8 0.0 0 0921 1541 13 WED FEB 28 18 37 19 14 19 40 17 21 06 45 05 29 05 55 06 32 05 54 10 15 15 45 9.8 0.0 0 1020 1158 08 ONE LINE REFERS TO EVENING DATE LAST QUARTER Feb 07 15:53 UT AND FOLLOWING MORNING. NEW MOON Feb 15 21:06 UT All dates and times are zone HST FIRST QUARTER Feb 23 08:08 UT