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 SAT DEC 01 17 52 18 32 18 59 18 37 05 23 05 50 06 30 23 22 04 23 09 47 10.4 0.0 0 0603+2346 SUN DEC 02 17 52 18 33 18 59 19 34 05 23 05 50 06 30 23 26 04 27 09 51 10.4 0.6 5 0704+2412 MON DEC 03 17 53 18 33 19 00 20 35 05 24 05 51 06 31 23 30 04 31 09 56 10.4 1.6 15 0805+2307 TUE DEC 04 17 53 18 33 19 00 21 38 05 24 05 51 06 32 23 34 04 35 10 00 10.4 2.6 25 0905+2035 WED DEC 05 17 53 18 33 19 00 22 41 05 25 05 52 06 32 23 38 04 39 10 05 10.4 3.7 35 1003+1648 THU DEC 06 17 53 18 33 19 00 23 42 05 25 05 52 06 33 23 42 04 43 10 09 10.4 4.7 45 1058+1204 FRI DEC 07 17 53 18 34 19 01 00 42 05 26 05 53 06 33 23 47 04 47 10 14 10.4 5.7 54 1151+0642 SAT DEC 08 17 54 18 34 19 01 01 41 05 27 05 54 06 34 23 51 04 51 10 19 10.4 6.7 63 1242+0100 SUN DEC 09 17 54 18 34 19 01 02 38 05 27 05 54 06 35 23 55 04 55 10 23 10.4 7.6 73 1333-0443 MON DEC 10 17 54 18 35 19 02 03 36 05 28 05 55 06 35 00 00 04 59 10 28 10.4 8.6 82 1425-1010 TUE DEC 11 17 55 18 35 19 02 04 34 05 28 05 55 06 36 00 04 05 03 10 32 10.4 9.5 91 1518-1503 WED DEC 12 17 55 18 35 19 02 05 33 16 30 05 29 05 56 06 36 00 08 05 07 10 37 10.5 10.5 100 1612-1906 THU DEC 13 17 55 18 36 19 03 06 32 17 17 05 29 05 56 06 37 00 13 05 11 10 41 10.4 10.4 100 1708-2204 FRI DEC 14 17 56 18 36 19 03 07 29 18 08 05 30 05 57 06 38 00 17 05 15 10 46 10.5 10.5 100 1805-2348 SAT DEC 15 17 56 18 37 19 04 19 01 05 30 05 58 06 38 00 22 05 19 10 49 10.4 10.4 100 1901-2413 SUN DEC 16 17 56 18 37 19 04 19 55 05 31 05 58 06 39 00 26 05 23 10 54 10.4 9.6 91 1956-2324 MON DEC 17 17 57 18 37 19 05 20 49 05 31 05 59 06 39 00 31 05 26 10 58 10.4 8.7 83 2049-2126 TUE DEC 18 17 57 18 38 19 05 21 42 05 32 05 59 06 40 00 35 05 30 11 03 10.4 7.8 74 2139-1833 WED DEC 19 17 58 18 38 19 05 22 33 05 33 06 00 06 40 00 39 05 34 11 08 10.5 7.0 66 2226-1456 THU DEC 20 17 58 18 39 19 06 23 23 05 33 06 00 06 41 00 43 05 38 11 12 10.4 6.2 59 2312-1045 FRI DEC 21 17 59 18 39 19 06 00 11 05 34 06 01 06 41 00 47 05 42 11 17 10.5 5.4 51 2356-0610 SAT DEC 22 17 59 18 40 19 07 00 59 05 34 06 01 06 42 00 52 05 46 11 21 10.4 4.6 43 0039-0121 SUN DEC 23 18 00 18 40 19 07 01 48 05 35 06 02 06 42 00 56 05 50 11 26 10.5 3.8 36 0123+0334 MON DEC 24 18 00 18 41 19 08 02 38 05 35 06 02 06 43 01 01 05 54 11 30 10.5 3.0 28 0208+0827 TUE DEC 25 18 01 18 41 19 08 03 31 05 35 06 03 06 43 01 05 05 58 11 34 10.5 2.1 19 0256+1308 WED DEC 26 18 01 18 42 19 09 04 27 05 36 06 03 06 44 01 10 06 02 11 39 10.5 1.2 11 0347+1721 THU DEC 27 18 02 18 42 19 10 05 27 05 36 06 04 06 44 01 15 06 06 11 43 10.4 0.2 1 0442+2049 FRI DEC 28 18 02 18 43 19 10 16 24 06 28 05 37 06 04 06 44 01 19 06 10 11 48 10.5 0.0 0 0540+2312 SAT DEC 29 18 03 18 43 19 11 17 20 07 30 05 37 06 04 06 45 01 24 06 14 11 52 10.4 0.0 0 0642+2412 SUN DEC 30 18 04 18 44 19 11 18 21 05 38 06 05 06 45 01 28 06 18 11 57 10.5 0.0 0 0744+2339 MON DEC 31 18 04 18 45 19 12 19 26 05 38 06 05 06 46 01 33 06 22 12 01 10.4 0.2 2 0847+2130 ONE LINE REFERS TO EVENING DATE LAST QUARTER DEC 07 19:55 UT AND FOLLOWING MORNING. NEW MOON DEC 14 20:50 UT All dates and times are zone HST FIRST QUARTER DEC 22 21:00 UT in upper table (except sid time). FULL MOON DEC 30 10:43 UT