KECK OBSERVATORY CALENDAR FOR 1998 -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 1998 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight THU JAN 01 18 05 18 45 19 12 21 30 05 39 06 06 06 46 01 37 06 25 12 05 10.4 8.2 77 2211-1007 FRI JAN 02 18 05 18 46 19 13 22 30 05 39 06 06 06 46 01 42 06 29 12 09 10.4 7.2 68 2306-0600 SAT JAN 03 18 06 18 47 19 14 23 29 05 39 06 06 06 47 01 47 06 33 12 13 10.4 6.2 59 0000-0134 SUN JAN 04 18 07 18 47 19 14 00 27 05 40 06 07 06 47 01 51 06 37 12 18 10.4 5.2 50 0054+0255 MON JAN 05 18 07 18 48 19 15 01 26 05 40 06 07 06 47 01 55 06 41 12 22 10.4 4.2 40 0148+0715 TUE JAN 06 18 08 18 48 19 15 02 24 05 40 06 07 06 47 01 59 06 45 12 26 10.4 3.3 31 0242+1108 WED JAN 07 18 09 18 49 19 16 03 23 05 41 06 07 06 48 02 04 06 49 12 31 10.4 2.3 22 0337+1423 THU JAN 08 18 09 18 49 19 16 04 21 05 41 06 08 06 48 02 08 06 53 12 35 10.4 1.3 12 0433+1648 FRI JAN 09 18 10 18 50 19 17 05 18 05 41 06 08 06 48 02 13 06 57 12 39 10.4 0.4 3 0530+1815 SAT JAN 10 18 11 18 51 19 18 16 27 06 13 05 41 06 08 06 48 02 18 07 01 12 43 10.4 0.0 0 0626+1839 SUN JAN 11 18 11 18 51 19 18 17 21 07 04 05 42 06 08 06 48 02 22 07 05 12 48 10.4 0.0 0 0721+1802 MON JAN 12 18 12 18 52 19 19 18 15 07 52 05 42 06 09 06 49 02 27 07 09 12 52 10.4 0.0 0 0814+1630 TUE JAN 13 18 12 18 52 19 19 19 08 05 42 06 09 06 49 02 31 07 13 12 56 10.4 0.0 0 0906+1411 WED JAN 14 18 13 18 53 19 20 20 01 05 42 06 09 06 49 02 36 07 17 13 00 10.4 0.7 6 0955+1116 THU JAN 15 18 14 18 54 19 20 20 51 05 42 06 09 06 49 02 40 07 21 13 04 10.4 1.5 14 1043+0755 FRI JAN 16 18 14 18 54 19 21 21 40 05 42 06 09 06 49 02 45 07 25 13 08 10.3 2.3 22 1129+0418 SAT JAN 17 18 15 18 55 19 22 22 29 05 42 06 09 06 49 02 50 07 29 13 11 10.3 3.1 30 1214+0032 SUN JAN 18 18 16 18 55 19 22 23 17 05 43 06 09 06 49 02 54 07 33 13 16 10.3 3.9 37 1259-0312 MON JAN 19 18 16 18 56 19 23 00 05 05 43 06 09 06 49 02 59 07 36 13 20 10.3 4.7 45 1344-0651 TUE JAN 20 18 17 18 57 19 23 00 54 05 43 06 09 06 49 03 03 07 40 13 24 10.3 5.5 53 1431-1015 WED JAN 21 18 18 18 57 19 24 01 44 05 43 06 09 06 49 03 08 07 44 13 28 10.3 6.3 61 1519-1317 THU JAN 22 18 18 18 58 19 24 02 36 05 43 06 09 06 49 03 12 07 48 13 32 10.3 7.2 69 1609-1547 FRI JAN 23 18 19 18 58 19 25 03 30 05 43 06 09 06 49 03 16 07 52 13 36 10.3 8.1 78 1702-1735 SAT JAN 24 18 19 18 59 19 25 04 26 05 43 06 09 06 49 03 20 07 56 13 40 10.3 9.0 87 1758-1831 SUN JAN 25 18 20 18 59 19 26 05 21 16 16 05 43 06 09 06 48 03 25 08 00 13 44 10.3 9.9 96 1855-1824 MON JAN 26 18 21 19 00 19 26 06 16 17 14 05 43 06 09 06 48 03 29 08 04 13 48 10.3 10.3 100 1954-1710 TUE JAN 27 18 21 19 00 19 27 07 09 18 15 05 42 06 09 06 48 03 34 08 08 13 51 10.2 10.2 100 2053-1450 WED JAN 28 18 22 19 01 19 27 08 00 19 16 05 42 06 09 06 48 03 38 08 12 13 55 10.2 10.2 100 2152-1132 THU JAN 29 18 22 19 02 19 28 20 18 05 42 06 08 06 48 03 43 08 16 13 59 10.2 9.4 91 2249-0729 FRI JAN 30 18 23 19 02 19 28 21 20 05 42 06 08 06 47 03 47 08 20 14 03 10.2 8.4 81 2345-0300 SAT JAN 31 18 24 19 03 19 29 22 20 05 42 06 08 06 47 03 52 08 24 14 07 10.2 7.4 72 0040+0137 ONE LINE REFERS TO EVENING DATE FIRST QUARTER JAN 05 14:21 UT AND FOLLOWING MORNING. FULL MOON JAN 12 17:27 UT All dates and times are zone HST LAST QUARTER JAN 20 19:44 UT in upper table (except sid time). NEW MOON JAN 28 06:03 UT