KECK OBSERVATORY CALENDAR FOR 2017 -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 2017 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 APR 01 18 46 19 24 19 50 23 54 05 02 05 28 06 06 08 11 12 22 17 25 9.2 5.1 55 0535 1812 >90 SUN APR 02 18 46 19 24 19 50 00 53 05 01 05 27 06 05 08 15 12 26 17 28 9.2 4.1 45 0635 1839 82 MON APR 03 18 47 19 24 19 51 01 48 05 00 05 26 06 04 08 20 12 30 17 31 9.1 3.2 34 0734 1759 69 TUE APR 04 18 47 19 25 19 51 02 39 04 59 05 25 06 03 08 24 12 34 17 33 9.1 2.3 25 0831 1613 58 WED APR 05 18 47 19 25 19 51 03 26 04 58 05 24 06 02 08 28 12 38 17 36 9.1 1.5 16 0925 1334 46 THU APR 06 18 47 19 25 19 52 14 53 04 10 04 57 05 23 06 01 08 33 12 42 17 39 9.1 0.8 8 1018 1013 36 FRI APR 07 18 48 19 26 19 52 15 47 04 51 04 56 05 22 06 00 08 37 12 46 17 42 9.1 0.1 0 1109 0624 27 SAT APR 08 18 48 19 26 19 52 16 40 05 31 04 55 05 21 06 00 08 41 12 49 17 45 9.0 0.0 0 1158 0219 22 SUN APR 09 18 48 19 26 19 53 17 32 06 09 04 54 05 20 05 59 08 46 12 53 17 48 9.0 0.0 0 1246-0149 22 MON APR 10 18 48 19 27 19 53 18 22 06 48 04 53 05 20 05 58 08 50 12 57 17 51 9.0 0.0 0 1334-0551 27 TUE APR 11 18 49 19 27 19 53 19 12 04 52 05 19 05 57 08 54 13 01 17 54 9.0 0.0 0 1421-0935 35 WED APR 12 18 49 19 27 19 54 20 02 04 51 05 18 05 56 08 59 13 05 17 57 9.0 0.1 1 1509-1253 45 THU APR 13 18 49 19 28 19 54 20 51 04 50 05 17 05 55 09 02 13 09 18 00 8.9 1.0 10 1557-1538 54 FRI APR 14 18 50 19 28 19 55 21 41 04 50 05 16 05 55 09 07 13 13 18 04 8.9 1.8 19 1646-1742 64 SAT APR 15 18 50 19 29 19 55 22 30 04 49 05 15 05 54 09 11 13 17 18 07 8.9 2.6 29 1736-1901 74 SUN APR 16 18 50 19 29 19 56 23 19 04 48 05 14 05 53 09 16 13 21 18 10 8.9 3.4 38 1826-1924 85 MON APR 17 18 51 19 29 19 56 00 06 04 47 05 14 05 52 09 20 13 25 18 13 8.9 4.2 47 1917-1905 >90 TUE APR 18 18 51 19 30 19 56 00 53 04 46 05 13 05 51 09 24 13 29 18 16 8.8 5.0 56 2008-1751 >90 WED APR 19 18 51 19 30 19 57 01 39 04 45 05 12 05 51 09 29 13 33 18 19 8.8 5.7 64 2059-1546 >90 THU APR 20 18 52 19 30 19 57 02 23 04 44 05 11 05 50 09 33 13 37 18 22 8.8 6.4 73 2150-1255 >90 FRI APR 21 18 52 19 31 19 58 03 07 14 33 04 43 05 10 05 49 09 38 13 41 18 24 8.7 7.1 81 2242-0922 >90 SAT APR 22 18 52 19 31 19 58 03 51 15 29 04 42 05 09 05 49 09 42 13 45 18 27 8.7 7.9 90 2333-0514 >90 SUN APR 23 18 53 19 32 19 59 04 36 16 27 04 42 05 09 05 48 09 47 13 49 18 31 8.7 8.6 98 0026-0043 >90 MON APR 24 18 53 19 32 19 59 05 22 17 27 04 41 05 08 05 47 09 51 13 53 18 34 8.7 8.7 100 0121 0357 >90 TUE APR 25 18 53 19 32 20 00 06 10 18 29 04 40 05 07 05 46 09 56 13 56 18 37 8.7 8.7 100 0217 0828 >90 WED APR 26 18 54 19 33 20 00 19 32 04 39 05 06 05 46 10 00 14 00 18 40 8.7 8.7 100 0315 1230 >90 THU APR 27 18 54 19 33 20 01 20 37 04 38 05 06 05 45 10 05 14 04 18 43 8.6 8.0 93 0415 1543 >90 FRI APR 28 18 54 19 34 20 01 21 42 04 37 05 05 05 44 10 09 14 08 18 46 8.6 6.9 80 0516 1751 >90 SAT APR 29 18 55 19 34 20 02 22 44 04 37 05 04 05 44 10 14 14 12 18 50 8.6 5.9 68 0618 1844 >90 SUN APR 30 18 55 19 35 20 02 23 43 04 36 05 03 05 43 10 18 14 16 18 53 8.6 4.9 57 0718 1822 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Apr 03 18:39 UT AND FOLLOWING MORNING. FULL MOON Apr 11 06:08 UT All dates and times are zone HST LAST QUARTER Apr 19 09:58 UT in upper table (except sid time). NEW MOON Apr 26 12:15 UT