KECK OBSERVATORY CALENDAR FOR 2001 -ASTRONOMICAL (computed for altitude 4145.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) RA DEC 2001 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight THU FEB 01 18 24 19 03 19 29 01 37 05 42 06 08 06 47 03 57 08 29 14 12 10.2 4.1 39 0334+1504 FRI FEB 02 18 25 19 04 19 30 02 37 05 41 06 08 06 46 04 02 08 33 14 15 10.2 3.1 30 0429+1839 SAT FEB 03 18 25 19 04 19 30 03 39 05 41 06 07 06 46 04 06 08 37 14 19 10.2 2.0 19 0528+2115 SUN FEB 04 18 26 19 05 19 31 04 43 05 41 06 07 06 46 04 11 08 41 14 23 10.2 1.0 9 0631+2232 MON FEB 05 18 26 19 05 19 31 05 45 05 41 06 07 06 45 04 15 08 45 14 26 10.2 0.0 0 0736+2215 TUE FEB 06 18 27 19 06 19 32 16 47 06 45 05 40 06 06 06 45 04 20 08 48 14 29 10.1 0.0 0 0841+2020 WED FEB 07 18 27 19 06 19 32 17 55 07 39 05 40 06 06 06 45 04 24 08 52 14 33 10.1 0.0 0 0944+1658 THU FEB 08 18 28 19 06 19 32 19 02 05 40 06 06 06 44 04 28 08 56 14 37 10.1 0.0 0 1044+1228 FRI FEB 09 18 28 19 07 19 33 20 06 05 39 06 05 06 44 04 33 09 00 14 40 10.1 0.6 5 1141+0716 SAT FEB 10 18 29 19 07 19 33 21 08 05 39 06 05 06 43 04 37 09 04 14 44 10.1 1.6 15 1235+0148 SUN FEB 11 18 29 19 08 19 34 22 06 05 39 06 04 06 43 04 41 09 08 14 48 10.1 2.5 25 1327-0335 MON FEB 12 18 30 19 08 19 34 23 02 05 38 06 04 06 42 04 45 09 12 14 51 10.1 3.5 34 1417-0838 TUE FEB 13 18 30 19 09 19 35 23 57 05 38 06 03 06 42 04 50 09 16 14 55 10.0 4.4 43 1508-1306 WED FEB 14 18 31 19 09 19 35 00 51 05 37 06 03 06 41 04 54 09 20 14 58 10.0 5.3 52 1558-1650 THU FEB 15 18 31 19 10 19 35 01 45 05 37 06 02 06 41 04 58 09 24 15 02 10.0 6.2 61 1649-1943 FRI FEB 16 18 32 19 10 19 36 02 37 05 36 06 02 06 40 05 03 09 28 15 05 10.0 7.0 70 1740-2138 SAT FEB 17 18 32 19 10 19 36 03 27 05 36 06 01 06 40 05 07 09 32 15 09 10.0 7.8 78 1832-2233 SUN FEB 18 18 33 19 11 19 36 04 16 05 35 06 01 06 39 05 11 09 36 15 12 10.0 8.7 86 1923-2226 MON FEB 19 18 33 19 11 19 37 05 02 05 35 06 00 06 38 05 16 09 40 15 16 10.0 9.4 94 2014-2119 TUE FEB 20 18 33 19 11 19 37 05 46 16 43 05 34 06 00 06 38 05 20 09 44 15 19 9.9 9.9 100 2104-1917 WED FEB 21 18 34 19 12 19 37 06 26 17 33 05 33 05 59 06 37 05 24 09 48 15 22 9.9 9.9 100 2152-1625 THU FEB 22 18 34 19 12 19 38 07 05 18 24 05 33 05 59 06 36 05 29 09 52 15 25 9.9 9.9 100 2239-1250 FRI FEB 23 18 35 19 13 19 38 07 41 19 14 05 32 05 58 06 36 05 33 09 56 15 28 9.9 9.9 100 2325-0843 SAT FEB 24 18 35 19 13 19 39 20 03 05 32 05 57 06 35 05 38 09 59 15 32 9.9 9.5 95 0010-0413 SUN FEB 25 18 35 19 13 19 39 20 53 05 31 05 57 06 34 05 42 10 03 15 35 9.9 8.6 87 0056+0030 MON FEB 26 18 36 19 14 19 39 21 44 05 30 05 56 06 34 05 46 10 07 15 38 9.9 7.8 78 0142+0517 TUE FEB 27 18 36 19 14 19 40 22 36 05 30 05 55 06 33 05 51 10 11 15 42 9.8 6.9 70 0230+0955 WED FEB 28 18 37 19 14 19 40 23 30 05 29 05 55 06 32 05 55 10 15 15 45 9.8 6.0 60 0320+1412 ONE LINE REFERS TO EVENING DATE FIRST QUARTER FEB 01 14:06 UT AND FOLLOWING MORNING. FULL MOON FEB 08 07:12 UT All dates and times are zone HST LAST QUARTER FEB 15 03:26 UT in upper table (except sid time). NEW MOON FEB 23 08:25 UT