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 TUE SEP 01 18 48 19 26 19 52 02 36 04 52 05 18 05 56 17 49 22 24 03 42 9.9 2.7 27 1916-1836 WED SEP 02 18 47 19 25 19 52 03 33 04 52 05 18 05 57 17 52 22 27 03 46 9.9 1.8 17 2012-1714 THU SEP 03 18 46 19 24 19 51 16 31 04 32 04 52 05 19 05 57 17 55 22 31 03 51 9.9 0.8 7 2109-1449 FRI SEP 04 18 45 19 23 19 50 17 21 05 32 04 53 05 19 05 57 17 58 22 35 03 55 9.9 0.0 0 2206-1127 SAT SEP 05 18 44 19 22 19 49 18 10 06 34 04 53 05 19 05 57 18 01 22 39 03 59 9.9 0.0 0 2303-0719 SUN SEP 06 18 43 19 21 19 48 18 58 07 36 04 53 05 19 05 57 18 03 22 43 04 03 10.0 0.0 0 2359-0240 MON SEP 07 18 42 19 21 19 47 19 45 04 54 05 20 05 58 18 07 22 47 04 08 10.0 0.4 4 0055+0209 TUE SEP 08 18 42 19 20 19 46 20 32 04 54 05 20 05 58 18 10 22 51 04 12 10.0 1.2 11 0152+0650 WED SEP 09 18 41 19 19 19 45 21 20 04 54 05 20 05 58 18 13 22 55 04 16 10.0 2.0 20 0249+1103 THU SEP 10 18 40 19 18 19 44 22 09 04 54 05 20 05 58 18 16 22 59 04 20 10.0 2.9 28 0346+1432 FRI SEP 11 18 39 19 17 19 43 23 00 04 55 05 21 05 59 18 19 23 03 04 25 10.1 3.7 36 0444+1705 SAT SEP 12 18 38 19 16 19 42 23 53 04 55 05 21 05 59 18 22 23 07 04 29 10.1 4.6 45 0542+1834 SUN SEP 13 18 37 19 15 19 41 00 48 04 55 05 21 05 59 18 25 23 11 04 33 10.1 5.6 54 0639+1858 MON SEP 14 18 36 19 14 19 40 01 42 04 56 05 21 05 59 18 28 23 15 04 37 10.1 6.5 63 0735+1817 TUE SEP 15 18 35 19 13 19 39 02 37 04 56 05 22 05 59 18 31 23 19 04 42 10.1 7.4 72 0828+1640 WED SEP 16 18 34 19 12 19 38 03 31 16 11 04 56 05 22 06 00 18 34 23 23 04 46 10.2 8.3 81 0920+1414 THU SEP 17 18 33 19 11 19 37 04 23 16 55 04 56 05 22 06 00 18 37 23 27 04 49 10.2 9.2 90 1010+1111 FRI SEP 18 18 32 19 10 19 36 05 14 17 36 04 57 05 22 06 00 18 40 23 31 04 53 10.2 10.1 98 1058+0740 SAT SEP 19 18 32 19 09 19 35 06 03 18 14 04 57 05 23 06 00 18 43 23 34 04 58 10.2 10.2 100 1145+0354 SUN SEP 20 18 31 19 08 19 34 06 52 18 51 04 57 05 23 06 00 18 46 23 38 05 02 10.2 10.2 100 1230+0000 MON SEP 21 18 30 19 07 19 33 07 40 19 28 04 57 05 23 06 01 18 49 23 42 05 06 10.3 9.9 96 1315-0350 TUE SEP 22 18 29 19 06 19 32 20 05 04 58 05 23 06 01 18 52 23 46 05 10 10.3 9.3 90 1401-0731 WED SEP 23 18 28 19 05 19 31 20 42 04 58 05 23 06 01 18 54 23 50 05 14 10.3 8.7 84 1446-1055 THU SEP 24 18 27 19 05 19 30 21 22 04 58 05 24 06 01 18 58 23 54 05 19 10.3 8.0 77 1533-1352 FRI SEP 25 18 26 19 04 19 29 22 03 04 58 05 24 06 01 19 01 23 58 05 23 10.3 7.4 71 1621-1617 SAT SEP 26 18 25 19 03 19 28 22 47 04 59 05 24 06 02 19 04 00 02 05 27 10.4 6.6 63 1711-1800 SUN SEP 27 18 24 19 02 19 27 23 34 04 59 05 24 06 02 19 07 00 06 05 31 10.4 5.8 56 1803-1855 MON SEP 28 18 23 19 01 19 26 00 25 04 59 05 25 06 02 19 10 00 10 05 36 10.4 5.0 48 1856-1856 TUE SEP 29 18 22 19 00 19 26 01 18 04 59 05 25 06 02 19 13 00 14 05 40 10.4 4.1 39 1950-1759 WED SEP 30 18 22 18 59 19 25 02 15 04 59 05 25 06 03 19 16 00 18 05 44 10.4 3.2 30 2045-1601 ONE LINE REFERS TO EVENING DATE FULL MOON SEP 06 11:23 UT AND FOLLOWING MORNING. LAST QUARTER SEP 13 02:01 UT All dates and times are zone HST NEW MOON SEP 20 17:01 UT in upper table (except sid time). FIRST QUARTER SEP 28 21:14 UT