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 TUE DEC 01 17 52 18 32 18 59 16 19 05 49 05 23 05 50 06 30 23 20 04 22 09 46 10.4 0.0 0 0331+1354 WED DEC 02 17 52 18 33 18 59 17 12 06 55 05 23 05 50 06 30 23 24 04 26 09 50 10.4 0.0 0 0432+1700 THU DEC 03 17 53 18 33 19 00 18 09 07 59 05 24 05 51 06 31 23 29 04 30 09 55 10.4 0.0 0 0535+1855 FRI DEC 04 17 53 18 33 19 00 19 08 05 24 05 51 06 32 23 33 04 34 09 59 10.4 0.1 1 0637+1931 SAT DEC 05 17 53 18 33 19 00 20 08 05 25 05 52 06 32 23 37 04 38 10 04 10.4 1.1 10 0737+1850 SUN DEC 06 17 53 18 33 19 00 21 07 05 25 05 52 06 33 23 41 04 42 10 08 10.4 2.1 20 0835+1702 MON DEC 07 17 53 18 34 19 01 22 04 05 26 05 53 06 33 23 46 04 46 10 13 10.4 3.1 29 0929+1423 TUE DEC 08 17 54 18 34 19 01 22 59 05 27 05 54 06 34 23 50 04 50 10 18 10.4 4.0 38 1020+1105 WED DEC 09 17 54 18 34 19 01 23 51 05 27 05 54 06 35 23 54 04 54 10 22 10.4 4.8 46 1109+0724 THU DEC 10 17 54 18 35 19 02 00 41 05 28 05 55 06 35 23 59 04 58 10 27 10.4 5.7 54 1155+0329 FRI DEC 11 17 55 18 35 19 02 01 29 05 28 05 55 06 36 00 03 05 02 10 31 10.4 6.5 61 1240-0030 SAT DEC 12 17 55 18 35 19 02 02 18 05 29 05 56 06 36 00 07 05 06 10 36 10.5 7.3 69 1325-0425 SUN DEC 13 17 55 18 36 19 03 03 06 05 29 05 56 06 37 00 12 05 10 10 40 10.4 8.1 77 1410-0810 MON DEC 14 17 56 18 36 19 03 03 54 05 30 05 57 06 38 00 16 05 14 10 44 10.5 8.9 84 1456-1136 TUE DEC 15 17 56 18 37 19 04 04 44 05 30 05 58 06 38 00 21 05 18 10 48 10.4 9.7 92 1543-1435 WED DEC 16 17 56 18 37 19 04 05 34 16 40 05 31 05 58 06 39 00 25 05 21 10 53 10.4 10.4 100 1632-1659 THU DEC 17 17 57 18 37 19 05 06 25 17 24 05 31 05 59 06 39 00 30 05 25 10 57 10.4 10.4 100 1723-1840 FRI DEC 18 17 57 18 38 19 05 07 16 18 12 05 32 05 59 06 40 00 34 05 29 11 02 10.4 10.4 100 1815-1930 SAT DEC 19 17 58 18 38 19 05 19 02 05 33 06 00 06 40 00 37 05 33 11 07 10.5 10.5 100 1908-1924 SUN DEC 20 17 58 18 39 19 06 19 54 05 33 06 00 06 41 00 42 05 37 11 11 10.4 9.7 92 2001-1820 MON DEC 21 17 59 18 39 19 06 20 48 05 34 06 01 06 41 00 46 05 41 11 16 10.5 8.8 83 2055-1618 TUE DEC 22 17 59 18 40 19 07 21 43 05 34 06 01 06 42 00 51 05 45 11 20 10.4 7.8 75 2147-1325 WED DEC 23 18 00 18 40 19 07 22 39 05 35 06 02 06 42 00 55 05 49 11 25 10.5 6.9 66 2240-0949 THU DEC 24 18 00 18 41 19 08 23 35 05 35 06 02 06 43 01 00 05 53 11 29 10.5 6.0 57 2332-0539 FRI DEC 25 18 01 18 41 19 08 00 32 05 35 06 03 06 43 01 04 05 57 11 33 10.5 5.1 48 0024-0106 SAT DEC 26 18 01 18 42 19 09 01 30 05 36 06 03 06 44 01 09 06 01 11 38 10.5 4.1 39 0117+0334 SUN DEC 27 18 02 18 42 19 10 02 30 05 36 06 04 06 44 01 14 06 05 11 42 10.4 3.1 29 0211+0808 MON DEC 28 18 02 18 43 19 10 03 31 05 37 06 04 06 44 01 18 06 09 11 47 10.5 2.1 20 0308+1219 TUE DEC 29 18 03 18 43 19 11 04 34 05 37 06 04 06 45 01 23 06 13 11 51 10.4 1.1 10 0407+1546 WED DEC 30 18 04 18 44 19 11 05 38 05 38 06 05 06 45 01 27 06 17 11 56 10.5 0.0 0 0507+1813 THU DEC 31 18 04 18 45 19 12 16 48 06 40 05 38 06 05 06 46 01 32 06 21 12 00 10.4 0.0 0 0609+1927 ONE LINE REFERS TO EVENING DATE FULL MOON DEC 03 15:24 UT AND FOLLOWING MORNING. LAST QUARTER DEC 10 17:57 UT All dates and times are zone HST NEW MOON DEC 18 22:47 UT in upper table (except sid time). FIRST QUARTER DEC 26 10:49 UT