KECK OBSERVATORY CALENDAR FOR 1999 -NAUTICAL (computed for altitude 4145.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) RA DEC 1999 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight MON FEB 01 18 24 19 03 19 29 19 25 05 42 06 08 06 47 03 29 08 27 14 36 11.1 0.4 3 1031+1036 TUE FEB 02 18 25 19 04 19 30 20 20 05 41 06 08 06 46 03 34 08 31 14 40 11.1 1.3 11 1121+0643 WED FEB 03 18 25 19 04 19 30 21 12 05 41 06 07 06 46 03 38 08 35 14 43 11.0 2.1 19 1209+0237 THU FEB 04 18 26 19 05 19 31 22 02 05 41 06 07 06 46 03 43 08 39 14 47 11.0 2.9 26 1255-0128 FRI FEB 05 18 26 19 05 19 31 22 51 05 41 06 07 06 45 03 47 08 43 14 51 11.0 3.8 34 1341-0526 SAT FEB 06 18 27 19 06 19 32 23 40 05 40 06 06 06 45 03 52 08 46 14 53 11.0 4.6 41 1426-0908 SUN FEB 07 18 27 19 06 19 32 00 28 05 40 06 06 06 45 03 56 08 50 14 57 11.0 5.4 48 1513-1228 MON FEB 08 18 28 19 06 19 32 01 18 05 40 06 06 06 44 04 00 08 54 15 01 11.0 6.2 56 1600-1517 TUE FEB 09 18 28 19 07 19 33 02 08 05 39 06 05 06 44 04 04 08 58 15 04 11.0 7.0 63 1649-1728 WED FEB 10 18 29 19 07 19 33 02 58 05 39 06 05 06 43 04 08 09 02 15 08 11.0 7.8 71 1740-1855 THU FEB 11 18 29 19 08 19 34 03 49 05 39 06 04 06 43 04 13 09 06 15 11 10.9 8.7 79 1832-1930 FRI FEB 12 18 30 19 08 19 34 04 40 05 38 06 04 06 42 04 17 09 10 15 15 10.9 9.5 87 1926-1908 SAT FEB 13 18 30 19 09 19 35 05 30 16 29 05 38 06 03 06 42 04 22 09 14 15 18 10.9 10.4 94 2020-1745 SUN FEB 14 18 31 19 09 19 35 06 19 17 25 05 37 06 03 06 41 04 26 09 18 15 22 10.9 10.9 100 2115-1522 MON FEB 15 18 31 19 10 19 35 07 06 18 23 05 37 06 02 06 41 04 31 09 22 15 25 10.9 10.9 100 2210-1206 TUE FEB 16 18 32 19 10 19 36 07 52 19 21 05 36 06 02 06 40 04 35 09 26 15 29 10.9 10.7 98 2304-0805 WED FEB 17 18 32 19 10 19 36 20 19 05 36 06 01 06 40 04 39 09 30 15 32 10.9 9.7 89 2358-0335 THU FEB 18 18 33 19 11 19 36 21 18 05 35 06 01 06 39 04 44 09 34 15 36 10.8 8.7 80 0051+0109 FRI FEB 19 18 33 19 11 19 37 22 17 05 35 06 00 06 38 04 48 09 38 15 39 10.8 7.7 71 0146+0551 SAT FEB 20 18 33 19 11 19 37 23 17 05 34 06 00 06 38 04 52 09 42 15 43 10.8 6.7 62 0240+1012 SUN FEB 21 18 34 19 12 19 37 00 18 05 33 05 59 06 37 04 57 09 46 15 46 10.8 5.7 52 0337+1358 MON FEB 22 18 34 19 12 19 38 01 18 05 33 05 59 06 36 05 01 09 50 15 50 10.8 4.7 43 0434+1653 TUE FEB 23 18 35 19 13 19 38 02 18 05 32 05 58 06 36 05 06 09 53 15 52 10.7 3.7 34 0532+1846 WED FEB 24 18 35 19 13 19 39 03 16 05 32 05 57 06 35 05 10 09 57 15 55 10.7 2.7 25 0631+1931 THU FEB 25 18 35 19 13 19 39 04 12 05 31 05 57 06 34 05 14 10 01 15 59 10.7 1.8 16 0729+1905 FRI FEB 26 18 36 19 14 19 39 05 03 05 30 05 56 06 34 05 19 10 05 16 02 10.7 0.9 8 0826+1734 SAT FEB 27 18 36 19 14 19 40 16 18 05 51 05 30 05 55 06 33 05 22 10 09 16 05 10.7 0.1 0 0920+1505 SUN FEB 28 18 37 19 14 19 40 17 14 06 36 05 29 05 55 06 32 05 26 10 13 16 09 10.7 0.0 0 1013+1152 ONE LINE REFERS TO EVENING DATE LAST QUARTER FEB 08 12:01 UT AND FOLLOWING MORNING. NEW MOON FEB 16 06:41 UT All dates and times are zone HST FIRST QUARTER FEB 23 02:46 UT