KECK OBSERVATORY CALENDAR FOR 1998 -NAUTICAL (computed for altitude 4145.0 m) NAUTICAL(12 deg) TWILIGHT/DAWN MOON DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (12 deg) RA DEC 1998 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight THU JAN 01 18 05 18 45 19 12 21 30 05 39 06 06 06 46 01 10 06 25 12 32 11.3 8.6 75 2211-1007 FRI JAN 02 18 05 18 46 19 13 22 30 05 39 06 06 06 46 01 15 06 29 12 36 11.3 7.6 67 2306-0600 SAT JAN 03 18 06 18 47 19 14 23 29 05 39 06 06 06 47 01 20 06 33 12 40 11.3 6.6 58 0000-0134 SUN JAN 04 18 07 18 47 19 14 00 27 05 40 06 07 06 47 01 23 06 37 12 45 11.3 5.7 49 0054+0255 MON JAN 05 18 07 18 48 19 15 01 26 05 40 06 07 06 47 01 28 06 41 12 49 11.3 4.7 41 0148+0715 TUE JAN 06 18 08 18 48 19 15 02 24 05 40 06 07 06 47 01 32 06 45 12 53 11.3 3.7 32 0242+1108 WED JAN 07 18 09 18 49 19 16 03 23 05 41 06 07 06 48 01 37 06 49 12 57 11.3 2.7 24 0337+1423 THU JAN 08 18 09 18 49 19 16 04 21 05 41 06 08 06 48 01 41 06 53 13 02 11.3 1.8 15 0433+1648 FRI JAN 09 18 10 18 50 19 17 05 18 05 41 06 08 06 48 01 46 06 57 13 06 11.3 0.8 7 0530+1815 SAT JAN 10 18 11 18 51 19 18 16 27 06 13 05 41 06 08 06 48 01 51 07 01 13 10 11.3 0.0 0 0626+1839 SUN JAN 11 18 11 18 51 19 18 17 21 07 04 05 42 06 08 06 48 01 55 07 05 13 14 11.3 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 00 07 09 13 19 11.3 0.0 0 0814+1630 TUE JAN 13 18 12 18 52 19 19 19 08 05 42 06 09 06 49 02 04 07 13 13 23 11.3 0.3 2 0906+1411 WED JAN 14 18 13 18 53 19 20 20 01 05 42 06 09 06 49 02 09 07 17 13 27 11.3 1.1 10 0955+1116 THU JAN 15 18 14 18 54 19 20 20 51 05 42 06 09 06 49 02 14 07 21 13 31 11.3 2.0 17 1043+0755 FRI JAN 16 18 14 18 54 19 21 21 40 05 42 06 09 06 49 02 18 07 25 13 35 11.3 2.8 24 1129+0418 SAT JAN 17 18 15 18 55 19 22 22 29 05 42 06 09 06 49 02 23 07 29 13 39 11.2 3.6 31 1214+0032 SUN JAN 18 18 16 18 55 19 22 23 17 05 43 06 09 06 49 02 27 07 33 13 43 11.2 4.4 38 1259-0312 MON JAN 19 18 16 18 56 19 23 00 05 05 43 06 09 06 49 02 32 07 36 13 46 11.2 5.2 45 1344-0651 TUE JAN 20 18 17 18 57 19 23 00 54 05 43 06 09 06 49 02 37 07 40 13 50 11.2 5.9 53 1431-1015 WED JAN 21 18 18 18 57 19 24 01 44 05 43 06 09 06 49 02 41 07 44 13 54 11.2 6.8 60 1519-1317 THU JAN 22 18 18 18 58 19 24 02 36 05 43 06 09 06 49 02 45 07 48 13 58 11.2 7.6 68 1609-1547 FRI JAN 23 18 19 18 58 19 25 03 30 05 43 06 09 06 49 02 49 07 52 14 02 11.2 8.5 76 1702-1735 SAT JAN 24 18 19 18 59 19 25 04 26 05 43 06 09 06 49 02 54 07 56 14 06 11.2 9.4 84 1758-1831 SUN JAN 25 18 20 18 59 19 26 05 21 16 16 05 43 06 09 06 48 02 58 08 00 14 10 11.2 10.4 92 1855-1824 MON JAN 26 18 21 19 00 19 26 06 16 17 14 05 43 06 09 06 48 03 03 08 04 14 14 11.2 11.2 100 1954-1710 TUE JAN 27 18 21 19 00 19 27 07 09 18 15 05 42 06 09 06 48 03 07 08 08 14 18 11.2 11.2 100 2053-1450 WED JAN 28 18 22 19 01 19 27 08 00 19 16 05 42 06 09 06 48 03 12 08 12 14 22 11.1 10.9 97 2152-1132 THU JAN 29 18 22 19 02 19 28 20 18 05 42 06 08 06 48 03 17 08 16 14 25 11.1 9.8 88 2249-0729 FRI JAN 30 18 23 19 02 19 28 21 20 05 42 06 08 06 47 03 21 08 20 14 29 11.1 8.8 79 2345-0300 SAT JAN 31 18 24 19 03 19 29 22 20 05 42 06 08 06 47 03 26 08 24 14 33 11.1 7.8 70 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