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 MAR 01 18 37 19 15 19 40 00 27 05 28 05 54 06 32 05 58 10 19 15 48 9.8 5.0 51 0413+1753 FRI MAR 02 18 37 19 15 19 40 01 27 05 28 05 53 06 31 06 02 10 23 15 52 9.8 4.0 40 0509+2043 SAT MAR 03 18 38 19 15 19 41 02 28 05 27 05 52 06 30 06 07 10 27 15 55 9.8 3.0 30 0609+2224 SUN MAR 04 18 38 19 16 19 41 03 29 05 26 05 52 06 29 06 11 10 31 15 58 9.8 2.0 19 0711+2242 MON MAR 05 18 38 19 16 19 41 04 28 05 25 05 51 06 28 06 15 10 35 16 01 9.7 0.9 9 0814+2127 TUE MAR 06 18 39 19 16 19 42 05 23 05 25 05 50 06 28 06 20 10 39 16 05 9.7 0.0 0 0916+1843 WED MAR 07 18 39 19 16 19 42 16 38 06 14 05 24 05 49 06 27 06 24 10 43 16 08 9.7 0.0 0 1016+1441 THU MAR 08 18 39 19 17 19 42 17 44 07 01 05 23 05 49 06 26 06 28 10 47 16 11 9.7 0.0 0 1114+0943 FRI MAR 09 18 40 19 17 19 43 18 47 07 46 05 22 05 48 06 25 06 33 10 51 16 14 9.6 0.0 0 1210+0413 SAT MAR 10 18 40 19 17 19 43 19 48 05 21 05 47 06 24 06 37 10 55 16 17 9.6 0.1 0 1304-0123 SUN MAR 11 18 40 19 18 19 43 20 47 05 21 05 46 06 24 06 41 10 59 16 20 9.6 1.1 11 1356-0647 MON MAR 12 18 40 19 18 19 44 21 44 05 20 05 45 06 23 06 46 11 03 16 23 9.6 2.0 20 1448-1141 TUE MAR 13 18 41 19 18 19 44 22 41 05 19 05 44 06 22 06 50 11 06 16 26 9.6 2.9 30 1540-1551 WED MAR 14 18 41 19 19 19 44 23 36 05 18 05 44 06 21 06 54 11 10 16 29 9.6 3.9 40 1632-1907 THU MAR 15 18 41 19 19 19 44 00 30 05 17 05 43 06 20 06 58 11 14 16 32 9.5 4.8 49 1725-2124 FRI MAR 16 18 42 19 19 19 45 01 22 05 16 05 42 06 19 07 03 11 18 16 35 9.5 5.6 59 1817-2237 SAT MAR 17 18 42 19 19 19 45 02 12 05 15 05 41 06 19 07 07 11 22 16 38 9.5 6.5 67 1909-2247 SUN MAR 18 18 42 19 20 19 45 02 59 05 15 05 40 06 18 07 10 11 26 16 42 9.5 7.2 76 2000-2154 MON MAR 19 18 42 19 20 19 46 03 43 05 14 05 39 06 17 07 15 11 30 16 45 9.5 8.0 83 2050-2005 TUE MAR 20 18 43 19 20 19 46 04 25 05 13 05 38 06 16 07 19 11 34 16 48 9.5 8.7 91 2139-1723 WED MAR 21 18 43 19 21 19 46 05 04 16 18 05 12 05 38 06 15 07 23 11 38 16 51 9.4 9.3 98 2226-1357 THU MAR 22 18 43 19 21 19 47 05 41 17 09 05 11 05 37 06 14 07 28 11 42 16 54 9.4 9.4 100 2312-0955 FRI MAR 23 18 44 19 21 19 47 06 17 17 59 05 10 05 36 06 13 07 32 11 46 16 57 9.4 9.4 100 2358-0525 SAT MAR 24 18 44 19 21 19 47 06 53 18 49 05 09 05 35 06 12 07 36 11 50 17 00 9.4 9.4 100 0044-0038 SUN MAR 25 18 44 19 22 19 47 07 30 19 40 05 08 05 34 06 12 07 40 11 54 17 03 9.4 9.4 100 0130+0414 MON MAR 26 18 44 19 22 19 48 20 32 05 07 05 33 06 11 07 45 11 58 17 06 9.3 8.6 92 0218+0902 TUE MAR 27 18 45 19 22 19 48 21 26 05 06 05 32 06 10 07 49 12 02 17 09 9.3 7.7 82 0308+1329 WED MAR 28 18 45 19 23 19 48 22 23 05 05 05 31 06 09 07 53 12 06 17 11 9.3 6.7 72 0400+1722 THU MAR 29 18 45 19 23 19 49 23 21 05 04 05 30 06 08 07 58 12 10 17 14 9.2 5.7 61 0456+2025 FRI MAR 30 18 45 19 23 19 49 00 21 05 04 05 29 06 07 08 02 12 14 17 18 9.2 4.7 50 0554+2222 SAT MAR 31 18 46 19 24 19 49 01 21 05 03 05 29 06 06 08 06 12 17 17 21 9.2 3.7 40 0654+2300 ONE LINE REFERS TO EVENING DATE FIRST QUARTER MAR 03 02:07 UT AND FOLLOWING MORNING. FULL MOON MAR 09 17:25 UT All dates and times are zone HST LAST QUARTER MAR 16 20:48 UT in upper table (except sid time). NEW MOON MAR 25 01:26 UT