KECK OBSERVATORY CALENDAR FOR 1999 -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 1999 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight WED DEC 01 17 52 18 32 18 59 02 12 05 23 05 50 06 30 23 20 04 21 09 45 10.4 7.2 69 1242+0023 THU DEC 02 17 52 18 33 18 59 03 02 05 23 05 50 06 30 23 23 04 25 09 49 10.4 8.0 77 1328-0359 FRI DEC 03 17 53 18 33 19 00 03 52 05 24 05 51 06 31 23 28 04 29 09 54 10.4 8.9 85 1414-0808 SAT DEC 04 17 53 18 33 19 00 04 41 16 05 05 24 05 51 06 32 23 32 04 33 09 58 10.4 9.7 93 1501-1155 SUN DEC 05 17 53 18 33 19 00 05 31 16 44 05 25 05 52 06 32 23 36 04 37 10 03 10.4 10.4 100 1548-1512 MON DEC 06 17 53 18 33 19 00 06 21 17 25 05 25 05 52 06 33 23 40 04 41 10 07 10.4 10.4 100 1636-1750 TUE DEC 07 17 53 18 34 19 01 07 11 18 08 05 26 05 53 06 33 23 45 04 45 10 12 10.4 10.4 100 1726-1943 WED DEC 08 17 54 18 34 19 01 08 00 18 53 05 27 05 54 06 34 23 49 04 49 10 17 10.4 10.4 100 1816-2045 THU DEC 09 17 54 18 34 19 01 19 41 05 27 05 54 06 35 23 53 04 53 10 21 10.4 9.8 93 1907-2052 FRI DEC 10 17 54 18 35 19 02 20 30 05 28 05 55 06 35 23 58 04 57 10 26 10.4 9.0 85 1957-2003 SAT DEC 11 17 55 18 35 19 02 21 21 05 28 05 55 06 36 00 02 05 01 10 30 10.4 8.1 77 2048-1820 SUN DEC 12 17 55 18 35 19 02 22 12 05 29 05 56 06 36 00 06 05 05 10 35 10.5 7.3 69 2138-1545 MON DEC 13 17 55 18 36 19 03 23 04 05 29 05 56 06 37 00 11 05 09 10 39 10.4 6.4 61 2227-1226 TUE DEC 14 17 56 18 36 19 03 23 57 05 30 05 57 06 38 00 15 05 13 10 44 10.5 5.5 53 2316-0829 WED DEC 15 17 56 18 37 19 04 00 50 05 30 05 58 06 38 00 20 05 17 10 47 10.4 4.7 44 0005-0402 THU DEC 16 17 56 18 37 19 04 01 46 05 31 05 58 06 39 00 24 05 20 10 52 10.4 3.7 35 0056+0044 FRI DEC 17 17 57 18 37 19 05 02 43 05 31 05 59 06 39 00 29 05 24 10 56 10.4 2.8 26 0148+0539 SAT DEC 18 17 57 18 38 19 05 03 44 05 32 05 59 06 40 00 33 05 28 11 01 10.4 1.8 17 0243+1025 SUN DEC 19 17 58 18 38 19 05 04 48 05 33 06 00 06 40 00 37 05 32 11 06 10.5 0.8 7 0341+1441 MON DEC 20 17 58 18 39 19 06 16 08 05 54 05 33 06 00 06 41 00 41 05 36 11 10 10.4 0.0 0 0442+1805 TUE DEC 21 17 59 18 39 19 06 17 05 07 00 05 34 06 01 06 41 00 45 05 40 11 15 10.5 0.0 0 0546+2015 WED DEC 22 17 59 18 40 19 07 18 06 05 34 06 01 06 42 00 50 05 44 11 19 10.4 0.0 0 0651+2056 THU DEC 23 18 00 18 40 19 07 19 10 05 35 06 02 06 42 00 54 05 48 11 24 10.5 0.0 0 0756+2006 FRI DEC 24 18 00 18 41 19 08 20 15 05 35 06 02 06 43 00 59 05 52 11 28 10.5 1.1 10 0858+1754 SAT DEC 25 18 01 18 41 19 08 21 18 05 35 06 03 06 43 01 03 05 56 11 32 10.5 2.2 20 0956+1439 SUN DEC 26 18 01 18 42 19 09 22 17 05 36 06 03 06 44 01 08 06 00 11 37 10.5 3.1 29 1050+1040 MON DEC 27 18 02 18 42 19 10 23 14 05 36 06 04 06 44 01 13 06 04 11 41 10.4 4.1 38 1141+0618 TUE DEC 28 18 02 18 43 19 10 00 07 05 37 06 04 06 44 01 17 06 08 11 46 10.5 5.0 47 1230+0146 WED DEC 29 18 03 18 43 19 11 00 58 05 37 06 04 06 45 01 22 06 12 11 50 10.4 5.8 55 1317-0242 THU DEC 30 18 04 18 44 19 11 01 48 05 38 06 05 06 45 01 26 06 16 11 55 10.5 6.6 63 1403-0658 FRI DEC 31 18 04 18 45 19 12 02 38 05 38 06 05 06 46 01 31 06 20 11 59 10.4 7.4 71 1449-1053 ONE LINE REFERS TO EVENING DATE NEW MOON DEC 07 22:34 UT AND FOLLOWING MORNING. FIRST QUARTER DEC 16 00:54 UT All dates and times are zone HST FULL MOON DEC 22 17:35 UT in upper table (except sid time). LAST QUARTER DEC 29 14:07 UT