KECK OBSERVATORY CALENDAR FOR 2018 -NAUTICAL (computed for altitude 4160.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) Zenith 2018 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 12 12 h h % h m d m deg SAT SEP 01 18 48 19 26 19 53 23 00 04 52 05 18 05 56 17 49 22 24 03 43 9.9 3.6 36 0403 1528 80 SUN SEP 02 18 47 19 25 19 52 23 49 04 52 05 18 05 57 17 52 22 28 03 47 9.9 4.4 44 0456 1755 >90 MON SEP 03 18 46 19 24 19 51 00 43 04 52 05 19 05 57 17 55 22 32 03 52 9.9 5.3 53 0558 1954 >90 TUE SEP 04 18 45 19 23 19 50 01 42 14 39 04 53 05 19 05 57 17 58 22 36 03 56 9.9 6.3 63 0659 2020 >90 WED SEP 05 18 44 19 22 19 49 02 45 15 38 04 53 05 19 05 57 18 01 22 40 04 00 9.9 7.4 74 0801 1925 >90 THU SEP 06 18 43 19 21 19 48 03 50 16 36 04 53 05 19 05 57 18 04 22 44 04 04 10.0 8.5 85 0902 1709 >90 FRI SEP 07 18 43 19 21 19 47 04 54 17 29 04 54 05 20 05 58 18 08 22 48 04 09 10.0 9.5 95 1001 1344 >90 SAT SEP 08 18 42 19 20 19 46 05 57 18 19 04 54 05 20 05 58 18 11 22 52 04 13 10.0 10.0 100 1058 0926 >90 SUN SEP 09 18 41 19 19 19 45 06 59 19 06 04 54 05 20 05 58 18 14 22 56 04 17 10.0 10.0 100 1154 0436 >90 MON SEP 10 18 40 19 18 19 44 19 50 04 54 05 20 05 58 18 17 23 00 04 20 10.0 9.5 94 1247-0024 >90 TUE SEP 11 18 39 19 17 19 43 20 33 04 55 05 21 05 59 18 20 23 04 04 25 10.1 8.8 87 1339-0518 >90 WED SEP 12 18 38 19 16 19 42 21 16 04 55 05 21 05 59 18 23 23 07 04 29 10.1 8.1 80 1430-0949 >90 THU SEP 13 18 37 19 15 19 41 21 59 04 55 05 21 05 59 18 26 23 11 04 33 10.1 7.4 72 1521-1345 >90 FRI SEP 14 18 36 19 14 19 40 22 42 04 56 05 21 05 59 18 29 23 15 04 37 10.1 6.6 65 1612-1658 >90 SAT SEP 15 18 35 19 13 19 39 23 27 04 56 05 22 05 59 18 32 23 19 04 42 10.1 5.9 58 1703-1920 >90 SUN SEP 16 18 34 19 12 19 38 00 14 04 56 05 22 06 00 18 34 23 23 04 46 10.2 5.1 50 1756-2035 90 MON SEP 17 18 33 19 11 19 37 01 02 04 56 05 22 06 00 18 37 23 27 04 50 10.2 4.3 42 1845-2118 80 TUE SEP 18 18 32 19 10 19 36 14 10 01 51 04 57 05 22 06 00 18 40 23 31 04 54 10.2 3.5 34 1936-2056 70 WED SEP 19 18 32 19 09 19 35 14 56 02 41 04 57 05 23 06 00 18 43 23 35 04 59 10.2 2.7 26 2027-1934 61 THU SEP 20 18 31 19 08 19 34 15 40 03 31 04 57 05 23 06 00 18 46 23 39 05 03 10.2 1.9 18 2116-1722 51 FRI SEP 21 18 30 19 07 19 33 16 21 04 22 04 57 05 23 06 01 18 49 23 43 05 07 10.3 1.0 9 2205-1423 42 SAT SEP 22 18 29 19 06 19 32 17 01 05 12 04 58 05 23 06 01 18 52 23 47 05 11 10.3 0.2 1 2253-1046 33 SUN SEP 23 18 28 19 05 19 31 17 39 06 03 04 58 05 23 06 01 18 55 23 51 05 15 10.3 0.0 0 2341-0639 27 MON SEP 24 18 27 19 05 19 30 18 17 06 54 04 58 05 24 06 01 18 59 23 55 05 20 10.3 0.0 0 0029-0211 24 TUE SEP 25 18 26 19 04 19 29 18 55 04 58 05 24 06 01 19 02 23 59 05 24 10.3 0.0 0 0117 0227 26 WED SEP 26 18 25 19 03 19 28 19 34 04 59 05 24 06 02 19 05 00 03 05 28 10.4 0.5 4 0206 0701 33 THU SEP 27 18 24 19 02 19 27 20 15 04 59 05 24 06 02 19 08 00 07 05 32 10.4 1.2 11 0257 1118 42 FRI SEP 28 18 23 19 01 19 26 20 59 04 59 05 25 06 02 19 11 00 11 05 36 10.4 2.0 18 0351 1503 52 SAT SEP 29 18 23 19 00 19 26 21 46 04 59 05 25 06 02 19 14 00 15 05 40 10.4 2.8 26 0446 1800 64 SUN SEP 30 18 22 18 59 19 25 22 38 05 00 05 25 06 03 19 17 00 18 05 44 10.4 3.6 34 0544 1956 76 ONE LINE REFERS TO EVENING DATE LAST QUARTER Sep 03 02:38 UT AND FOLLOWING MORNING. NEW MOON Sep 09 18:01 UT All dates and times are zone HST FIRST QUARTER Sep 16 23:16 UT in upper table (except sid time). FULL MOON Sep 25 02:52 UT