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 MON JAN 01 18 05 18 45 19 12 00 11 05 39 06 06 06 46 01 38 06 27 12 06 10.4 5.5 52 0034-0200 TUE JAN 02 18 05 18 46 19 13 01 02 05 39 06 06 06 46 01 43 06 31 12 10 10.4 4.6 44 0120+0248 WED JAN 03 18 06 18 47 19 14 01 55 05 39 06 06 06 47 01 48 06 34 12 14 10.4 3.7 35 0209+0739 THU JAN 04 18 07 18 47 19 14 02 52 05 40 06 07 06 47 01 52 06 38 12 19 10.4 2.8 26 0300+1218 FRI JAN 05 18 07 18 48 19 15 03 52 05 40 06 07 06 47 01 57 06 42 12 23 10.4 1.8 17 0355+1629 SAT JAN 06 18 08 18 48 19 15 04 55 05 40 06 07 06 47 02 00 06 46 12 27 10.4 0.8 7 0454+1949 SUN JAN 07 18 09 18 49 19 16 06 01 05 41 06 07 06 48 02 05 06 50 12 32 10.4 0.0 0 0556+2157 MON JAN 08 18 09 18 49 19 16 17 00 07 06 05 41 06 08 06 48 02 09 06 54 12 36 10.4 0.0 0 0702+2233 TUE JAN 09 18 10 18 50 19 17 18 06 05 41 06 08 06 48 02 14 06 58 12 40 10.4 0.0 0 0807+2130 WED JAN 10 18 11 18 51 19 18 19 14 05 41 06 08 06 48 02 19 07 02 12 44 10.4 0.0 0 0911+1853 THU JAN 11 18 11 18 51 19 18 20 20 05 42 06 08 06 48 02 23 07 06 12 49 10.4 1.0 9 1012+1501 FRI JAN 12 18 12 18 52 19 19 21 24 05 42 06 09 06 49 02 28 07 10 12 53 10.4 2.1 20 1109+1018 SAT JAN 13 18 12 18 52 19 19 22 25 05 42 06 09 06 49 02 32 07 14 12 57 10.4 3.1 29 1203+0509 SUN JAN 14 18 13 18 53 19 20 23 22 05 42 06 09 06 49 02 37 07 18 13 01 10.4 4.0 38 1254-0007 MON JAN 15 18 14 18 54 19 20 00 17 05 42 06 09 06 49 02 41 07 22 13 05 10.4 4.9 47 1344-0513 TUE JAN 16 18 14 18 54 19 21 01 11 05 42 06 09 06 49 02 46 07 26 13 09 10.3 5.8 56 1433-0956 WED JAN 17 18 15 18 55 19 22 02 04 05 42 06 09 06 49 02 51 07 30 13 13 10.3 6.7 64 1522-1406 THU JAN 18 18 16 18 55 19 22 02 57 05 43 06 09 06 49 02 55 07 34 13 18 10.3 7.6 73 1612-1734 FRI JAN 19 18 16 18 56 19 23 03 49 05 43 06 09 06 49 03 00 07 38 13 21 10.3 8.4 81 1702-2011 SAT JAN 20 18 17 18 57 19 23 04 41 05 43 06 09 06 49 03 04 07 41 13 25 10.3 9.3 90 1753-2152 SUN JAN 21 18 18 18 57 19 24 05 31 16 17 05 43 06 09 06 49 03 09 07 45 13 29 10.3 10.1 98 1845-2232 MON JAN 22 18 18 18 58 19 24 06 19 17 06 05 43 06 09 06 49 03 13 07 49 13 33 10.3 10.3 100 1936-2212 TUE JAN 23 18 19 18 58 19 25 07 04 17 56 05 43 06 09 06 49 03 18 07 53 13 37 10.3 10.3 100 2027-2052 WED JAN 24 18 19 18 59 19 25 07 47 18 47 05 43 06 09 06 48 03 21 07 57 13 41 10.3 10.3 100 2116-1837 THU JAN 25 18 20 18 59 19 26 19 38 05 43 06 09 06 48 03 26 08 01 13 45 10.3 10.1 98 2204-1536 FRI JAN 26 18 21 19 00 19 26 20 27 05 43 06 09 06 48 03 30 08 05 13 49 10.3 9.3 90 2251-1155 SAT JAN 27 18 21 19 00 19 27 21 17 05 42 06 09 06 48 03 35 08 09 13 52 10.2 8.4 82 2336-0744 SUN JAN 28 18 22 19 01 19 27 22 06 05 42 06 09 06 48 03 39 08 13 13 56 10.2 7.6 74 0021-0313 MON JAN 29 18 22 19 02 19 28 22 56 05 42 06 08 06 48 03 44 08 17 14 00 10.2 6.8 66 0107+0129 TUE JAN 30 18 23 19 02 19 28 23 47 05 42 06 08 06 47 03 48 08 21 14 04 10.2 5.9 57 0154+0614 WED JAN 31 18 24 19 03 19 29 00 41 05 42 06 08 06 47 03 53 08 25 14 08 10.2 5.0 49 0242+1050 ONE LINE REFERS TO EVENING DATE FIRST QUARTER JAN 02 22:36 UT AND FOLLOWING MORNING. FULL MOON JAN 09 20:27 UT All dates and times are zone HST LAST QUARTER JAN 16 12:37 UT in upper table (except sid time). NEW MOON JAN 24 13:09 UT