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 SUN MAR 01 18 37 19 15 19 40 22 09 05 28 05 54 06 32 05 32 10 18 16 13 10.7 7.8 72 0213+0854 MON MAR 02 18 37 19 15 19 40 23 10 05 28 05 53 06 31 05 36 10 22 16 16 10.6 6.7 63 0310+1238 TUE MAR 03 18 38 19 15 19 41 00 10 05 27 05 52 06 30 05 40 10 26 16 19 10.6 5.7 53 0406+1532 WED MAR 04 18 38 19 16 19 41 01 08 05 26 05 52 06 29 05 45 10 30 16 23 10.6 4.7 44 0503+1729 THU MAR 05 18 38 19 16 19 41 02 03 05 25 05 51 06 28 05 49 10 34 16 26 10.6 3.8 35 0558+1825 FRI MAR 06 18 39 19 16 19 42 02 55 05 25 05 50 06 28 05 53 10 38 16 29 10.6 2.9 27 0653+1821 SAT MAR 07 18 39 19 16 19 42 03 44 05 24 05 49 06 27 05 57 10 42 16 32 10.6 2.1 19 0746+1721 SUN MAR 08 18 39 19 17 19 42 04 30 05 23 05 49 06 26 06 02 10 46 16 36 10.5 1.3 12 0838+1531 MON MAR 09 18 40 19 17 19 43 05 13 05 22 05 48 06 25 06 06 10 50 16 39 10.5 0.6 5 0927+1300 TUE MAR 10 18 40 19 17 19 43 16 39 05 53 05 21 05 47 06 24 06 10 10 54 16 42 10.5 0.0 0 1015+0957 WED MAR 11 18 40 19 18 19 43 17 29 06 31 05 21 05 46 06 24 06 15 10 58 16 44 10.5 0.0 0 1102+0631 THU MAR 12 18 40 19 18 19 44 18 18 07 08 05 20 05 45 06 23 06 19 11 01 16 47 10.5 0.0 0 1147+0251 FRI MAR 13 18 41 19 18 19 44 19 06 07 44 05 19 05 44 06 22 06 23 11 05 16 50 10.4 0.0 0 1232-0053 SAT MAR 14 18 41 19 19 19 44 19 54 05 18 05 44 06 21 06 28 11 09 16 54 10.4 0.6 5 1317-0436 SUN MAR 15 18 41 19 19 19 44 20 42 05 17 05 43 06 20 06 32 11 13 16 57 10.4 1.4 13 1403-0809 MON MAR 16 18 42 19 19 19 45 21 31 05 16 05 42 06 19 06 35 11 17 17 00 10.4 2.2 21 1449-1123 TUE MAR 17 18 42 19 19 19 45 22 20 05 15 05 41 06 19 06 39 11 21 17 03 10.4 3.0 29 1537-1411 WED MAR 18 18 42 19 20 19 45 23 11 05 15 05 40 06 18 06 44 11 25 17 06 10.3 3.8 37 1627-1623 THU MAR 19 18 42 19 20 19 46 00 02 05 14 05 39 06 17 06 48 11 29 17 09 10.3 4.7 45 1718-1753 FRI MAR 20 18 43 19 20 19 46 00 54 05 13 05 38 06 16 06 52 11 33 17 12 10.3 5.6 54 1811-1831 SAT MAR 21 18 43 19 21 19 46 01 47 05 12 05 38 06 15 06 57 11 37 17 16 10.3 6.4 62 1906-1813 SUN MAR 22 18 43 19 21 19 47 02 39 05 11 05 37 06 14 07 01 11 41 17 19 10.3 7.3 71 2003-1653 MON MAR 23 18 44 19 21 19 47 03 31 05 10 05 36 06 13 07 05 11 45 17 22 10.2 8.2 79 2100-1431 TUE MAR 24 18 44 19 21 19 47 04 21 05 09 05 35 06 12 07 09 11 49 17 25 10.2 9.0 87 2158-1111 WED MAR 25 18 44 19 22 19 47 05 10 16 39 05 08 05 34 06 12 07 14 11 53 17 28 10.2 9.8 96 2255-0704 THU MAR 26 18 44 19 22 19 48 05 59 17 42 05 07 05 33 06 11 07 18 11 57 17 31 10.2 10.2 100 2353-0224 FRI MAR 27 18 45 19 22 19 48 06 48 18 46 05 06 05 32 06 10 07 22 12 01 17 34 10.2 10.2 100 0051+0227 SAT MAR 28 18 45 19 23 19 48 07 37 19 49 05 05 05 31 06 09 07 27 12 05 17 36 10.1 9.7 95 0149+0708 SUN MAR 29 18 45 19 23 19 49 20 53 05 04 05 30 06 08 07 31 12 08 17 39 10.1 8.6 85 0248+1119 MON MAR 30 18 45 19 23 19 49 21 56 05 04 05 29 06 07 07 35 12 12 17 42 10.1 7.6 74 0346+1441 TUE MAR 31 18 46 19 24 19 49 22 57 05 03 05 29 06 06 07 40 12 16 17 46 10.1 6.5 64 0445+1703 ONE LINE REFERS TO EVENING DATE FIRST QUARTER MAR 05 08:44 UT AND FOLLOWING MORNING. FULL MOON MAR 13 04:36 UT All dates and times are zone HST LAST QUARTER MAR 21 07:43 UT in upper table (except sid time). NEW MOON MAR 28 03:14 UT