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 SUN JUL 01 19 16 19 59 20 29 21 44 04 23 04 53 05 35 14 48 18 20 22 43 7.9 1.2 15 2159-1456 64 MON JUL 02 19 16 19 59 20 29 22 23 04 23 04 53 05 36 14 52 18 24 22 47 7.9 1.9 24 2247-1130 72 TUE JUL 03 19 16 19 59 20 29 23 02 04 24 04 54 05 36 14 56 18 28 22 52 7.9 2.5 32 2333-0731 80 WED JUL 04 19 16 19 59 20 29 23 39 04 24 04 54 05 36 15 00 18 31 22 56 7.9 3.2 39 0019-0310 89 THU JUL 05 19 16 19 59 20 28 00 17 04 24 04 54 05 37 15 03 18 35 23 00 7.9 3.8 48 0108 0111 >90 FRI JUL 06 19 16 19 58 20 28 00 57 04 25 04 55 05 37 15 07 18 39 23 05 7.9 4.5 56 0156 0541 >90 SAT JUL 07 19 16 19 58 20 28 01 39 14 03 04 25 04 55 05 37 15 11 18 43 23 09 7.9 5.2 65 0247 1001 >90 SUN JUL 08 19 16 19 58 20 28 02 25 15 01 04 26 04 56 05 38 15 15 18 47 23 14 8.0 5.9 74 0342 1356 >90 MON JUL 09 19 16 19 58 20 28 03 16 16 02 04 26 04 56 05 38 15 19 18 51 23 18 8.0 6.8 85 0439 1708 >90 TUE JUL 10 19 16 19 58 20 28 04 13 17 05 04 27 04 56 05 39 15 23 18 55 23 23 8.0 7.7 97 0540 1918 >90 WED JUL 11 19 16 19 58 20 28 05 15 18 10 04 27 04 57 05 39 15 27 18 59 23 27 8.0 8.0 100 0643 2009 >90 THU JUL 12 19 16 19 58 20 27 06 21 19 13 04 28 04 57 05 39 15 29 19 03 23 32 8.0 8.0 100 0747 1931 >90 FRI JUL 13 19 16 19 58 20 27 20 13 04 28 04 58 05 40 15 33 19 07 23 36 8.0 8.0 100 0850 1729 >90 SAT JUL 14 19 15 19 57 20 27 21 07 04 29 04 58 05 40 15 37 19 11 23 41 8.0 7.4 91 0951 1415 >90 SUN JUL 15 19 15 19 57 20 27 21 56 04 29 04 59 05 40 15 41 19 15 23 45 8.0 6.6 81 1048 1009 >90 MON JUL 16 19 15 19 57 20 26 22 42 04 30 04 59 05 41 15 44 19 19 23 50 8.1 5.8 71 1142 0532 >90 TUE JUL 17 19 15 19 57 20 26 23 24 04 30 05 00 05 41 15 48 19 23 23 53 8.1 5.1 63 1234 0044 >90 WED JUL 18 19 15 19 56 20 26 00 05 04 31 05 00 05 42 15 52 19 27 23 58 8.1 4.4 54 1329-0334 >90 THU JUL 19 19 14 19 56 20 25 00 45 04 31 05 00 05 42 15 55 19 31 00 02 8.1 3.8 46 1414-0824 83 FRI JUL 20 19 14 19 56 20 25 01 25 04 32 05 01 05 42 15 59 19 35 00 07 8.1 3.1 38 1503-1228 74 SAT JUL 21 19 14 19 55 20 24 14 09 02 07 04 32 05 01 05 43 16 02 19 39 00 11 8.1 2.4 29 1552-1552 66 SUN JUL 22 19 14 19 55 20 24 15 00 02 50 04 33 05 02 05 43 16 06 19 42 00 16 8.2 1.7 21 1642-1832 59 MON JUL 23 19 13 19 55 20 24 15 51 03 36 04 33 05 02 05 44 16 10 19 46 00 20 8.2 1.0 11 1733-2021 52 TUE JUL 24 19 13 19 54 20 23 16 41 04 23 04 34 05 03 05 44 16 13 19 50 00 25 8.2 0.2 2 1824-2116 46 WED JUL 25 19 13 19 54 20 23 17 30 05 12 04 34 05 03 05 44 16 17 19 54 00 29 8.2 0.0 0 1916-2115 42 THU JUL 26 19 12 19 53 20 22 18 17 06 01 04 35 05 04 05 45 16 20 19 58 00 34 8.2 0.0 0 2007-2017 40 FRI JUL 27 19 12 19 53 20 21 19 02 06 51 04 35 05 04 05 45 16 23 20 02 00 38 8.2 0.0 0 2057-1826 41 SAT JUL 28 19 11 19 52 20 21 19 44 04 36 05 05 05 46 16 27 20 06 00 43 8.2 0.0 0 2146-1548 43 SUN JUL 29 19 11 19 52 20 20 20 24 04 37 05 05 05 46 16 29 20 10 00 48 8.3 0.1 0 2234-1230 48 MON JUL 30 19 10 19 51 20 20 21 02 04 37 05 06 05 46 16 33 20 14 00 52 8.3 0.7 8 2321-0840 54 TUE JUL 31 19 10 19 51 20 19 21 40 04 38 05 06 05 47 16 36 20 18 00 57 8.3 1.3 16 0008-0428 62 ONE LINE REFERS TO EVENING DATE LAST QUARTER Jul 06 07:51 UT AND FOLLOWING MORNING. NEW MOON Jul 13 02:47 UT All dates and times are zone HST FIRST QUARTER Jul 19 19:52 UT in upper table (except sid time). FULL MOON Jul 27 20:21 UT