KECK OBSERVATORY CALENDAR FOR 1999 -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 1999 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight WED SEP 01 18 48 19 26 19 52 23 10 04 52 05 18 05 56 17 48 22 23 03 41 9.9 3.7 37 0411+1608 THU SEP 02 18 47 19 25 19 52 00 01 04 52 05 18 05 57 17 51 22 27 03 45 9.9 4.6 46 0509+1839 FRI SEP 03 18 46 19 24 19 51 00 57 04 52 05 19 05 57 17 54 22 30 03 50 9.9 5.6 55 0609+2001 SAT SEP 04 18 45 19 23 19 50 01 55 04 53 05 19 05 57 17 57 22 34 03 54 9.9 6.5 65 0709+2007 SUN SEP 05 18 44 19 22 19 49 02 54 04 53 05 19 05 57 18 00 22 38 03 58 9.9 7.5 75 0808+1858 MON SEP 06 18 43 19 21 19 48 03 54 16 40 04 53 05 19 05 57 18 03 22 42 04 02 10.0 8.5 85 0906+1642 TUE SEP 07 18 42 19 21 19 47 04 53 17 29 04 54 05 20 05 58 18 06 22 46 04 07 10.0 9.5 95 1001+1330 WED SEP 08 18 42 19 20 19 46 05 49 18 15 04 54 05 20 05 58 18 09 22 50 04 11 10.0 10.0 100 1054+0938 THU SEP 09 18 41 19 19 19 45 06 44 18 57 04 54 05 20 05 58 18 12 22 54 04 15 10.0 10.0 100 1145+0522 FRI SEP 10 18 40 19 18 19 44 07 37 19 37 04 54 05 20 05 58 18 15 22 58 04 19 10.0 9.7 96 1233+0057 SAT SEP 11 18 39 19 17 19 43 20 15 04 55 05 21 05 59 18 18 23 02 04 24 10.1 9.1 90 1321-0324 SUN SEP 12 18 38 19 16 19 42 20 53 04 55 05 21 05 59 18 21 23 06 04 28 10.1 8.5 83 1408-0733 MON SEP 13 18 37 19 15 19 41 21 32 04 55 05 21 05 59 18 24 23 10 04 32 10.1 7.8 77 1455-1118 TUE SEP 14 18 36 19 14 19 40 22 11 04 56 05 21 05 59 18 27 23 14 04 36 10.1 7.2 70 1542-1433 WED SEP 15 18 35 19 13 19 39 22 52 04 56 05 22 05 59 18 30 23 18 04 41 10.1 6.5 64 1630-1710 THU SEP 16 18 34 19 12 19 38 23 35 04 56 05 22 06 00 18 33 23 22 04 45 10.2 5.8 56 1719-1903 FRI SEP 17 18 33 19 11 19 37 00 21 04 56 05 22 06 00 18 36 23 26 04 49 10.2 5.0 49 1810-2007 SAT SEP 18 18 32 19 10 19 36 01 10 04 57 05 22 06 00 18 39 23 30 04 52 10.2 4.2 41 1901-2016 SUN SEP 19 18 32 19 09 19 35 02 01 04 57 05 23 06 00 18 42 23 34 04 57 10.2 3.4 32 1953-1928 MON SEP 20 18 31 19 08 19 34 02 54 04 57 05 23 06 00 18 45 23 37 05 01 10.2 2.5 24 2045-1743 TUE SEP 21 18 30 19 07 19 33 03 49 04 57 05 23 06 01 18 48 23 41 05 05 10.3 1.6 15 2138-1502 WED SEP 22 18 29 19 06 19 32 16 36 04 44 04 58 05 23 06 01 18 51 23 45 05 09 10.3 0.6 6 2230-1130 THU SEP 23 18 28 19 05 19 31 17 20 05 41 04 58 05 23 06 01 18 54 23 49 05 13 10.3 0.0 0 2323-0717 FRI SEP 24 18 27 19 05 19 30 18 03 06 39 04 58 05 24 06 01 18 57 23 53 05 18 10.3 0.0 0 0015-0235 SAT SEP 25 18 26 19 04 19 29 18 47 07 38 04 58 05 24 06 01 19 00 23 57 05 22 10.3 0.0 0 0109+0221 SUN SEP 26 18 25 19 03 19 28 19 31 04 59 05 24 06 02 19 03 00 01 05 26 10.4 0.5 4 0203+0713 MON SEP 27 18 24 19 02 19 27 20 17 04 59 05 24 06 02 19 06 00 05 05 30 10.4 1.2 12 0259+1143 TUE SEP 28 18 23 19 01 19 26 21 06 04 59 05 25 06 02 19 09 00 09 05 35 10.4 2.1 20 0357+1530 WED SEP 29 18 22 19 00 19 26 21 57 04 59 05 25 06 02 19 12 00 13 05 39 10.4 3.0 28 0456+1820 THU SEP 30 18 22 18 59 19 25 22 52 04 59 05 25 06 03 19 15 00 17 05 43 10.4 3.9 37 0556+1959 ONE LINE REFERS TO EVENING DATE LAST QUARTER SEP 02 22:21 UT AND FOLLOWING MORNING. NEW MOON SEP 09 22:04 UT All dates and times are zone HST FIRST QUARTER SEP 17 20:09 UT in upper table (except sid time). FULL MOON SEP 25 10:52 UT