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 SEP 01 18 48 19 26 19 52 23 10 04 52 05 18 05 56 18 14 22 23 03 15 9.0 3.3 36 0411+1608 THU SEP 02 18 47 19 25 19 52 00 01 04 52 05 18 05 57 18 18 22 27 03 19 9.0 4.1 46 0509+1839 FRI SEP 03 18 46 19 24 19 51 00 57 04 52 05 19 05 57 18 21 22 30 03 23 9.0 5.1 56 0609+2001 SAT SEP 04 18 45 19 23 19 50 01 55 04 53 05 19 05 57 18 24 22 34 03 28 9.0 6.1 67 0709+2007 SUN SEP 05 18 44 19 22 19 49 02 54 04 53 05 19 05 57 18 27 22 38 03 32 9.1 7.1 78 0808+1858 MON SEP 06 18 43 19 21 19 48 03 54 16 40 04 53 05 19 05 57 18 30 22 42 03 36 9.1 8.1 89 0906+1642 TUE SEP 07 18 42 19 21 19 47 04 53 17 29 04 54 05 20 05 58 18 33 22 46 03 41 9.1 9.1 99 1001+1330 WED SEP 08 18 42 19 20 19 46 05 49 18 15 04 54 05 20 05 58 18 35 22 50 03 45 9.1 9.1 100 1054+0938 THU SEP 09 18 41 19 19 19 45 06 44 18 57 04 54 05 20 05 58 18 38 22 54 03 49 9.2 9.2 100 1145+0522 FRI SEP 10 18 40 19 18 19 44 07 37 19 37 04 54 05 20 05 58 18 41 22 58 03 53 9.2 9.2 100 1233+0057 SAT SEP 11 18 39 19 17 19 43 20 15 04 55 05 21 05 59 18 44 23 02 03 58 9.2 8.7 94 1321-0324 SUN SEP 12 18 38 19 16 19 42 20 53 04 55 05 21 05 59 18 47 23 06 04 02 9.2 8.0 87 1408-0733 MON SEP 13 18 37 19 15 19 41 21 32 04 55 05 21 05 59 18 50 23 10 04 06 9.2 7.4 79 1455-1118 TUE SEP 14 18 36 19 14 19 40 22 11 04 56 05 21 05 59 18 53 23 14 04 11 9.3 6.8 72 1542-1433 WED SEP 15 18 35 19 13 19 39 22 52 04 56 05 22 05 59 18 56 23 18 04 15 9.3 6.1 65 1630-1710 THU SEP 16 18 34 19 12 19 38 23 35 04 56 05 22 06 00 18 59 23 22 04 19 9.3 5.3 57 1719-1903 FRI SEP 17 18 33 19 11 19 37 00 21 04 56 05 22 06 00 19 02 23 26 04 22 9.3 4.6 49 1810-2007 SAT SEP 18 18 32 19 10 19 36 01 10 04 57 05 22 06 00 19 05 23 30 04 27 9.3 3.8 40 1901-2016 SUN SEP 19 18 32 19 09 19 35 02 01 04 57 05 23 06 00 19 08 23 34 04 31 9.4 2.9 31 1953-1928 MON SEP 20 18 31 19 08 19 34 02 54 04 57 05 23 06 00 19 11 23 37 04 35 9.4 2.0 21 2045-1743 TUE SEP 21 18 30 19 07 19 33 03 49 04 57 05 23 06 01 19 14 23 41 04 39 9.4 1.1 12 2138-1502 WED SEP 22 18 29 19 06 19 32 16 36 04 44 04 58 05 23 06 01 19 17 23 45 04 44 9.4 0.2 2 2230-1130 THU SEP 23 18 28 19 05 19 31 17 20 05 41 04 58 05 23 06 01 19 20 23 49 04 48 9.5 0.0 0 2323-0717 FRI SEP 24 18 27 19 05 19 30 18 03 06 39 04 58 05 24 06 01 19 23 23 53 04 52 9.5 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 25 23 57 04 56 9.5 0.0 0 0109+0221 SUN SEP 26 18 25 19 03 19 28 19 31 04 59 05 24 06 02 19 28 00 01 05 01 9.5 0.0 0 0203+0713 MON SEP 27 18 24 19 02 19 27 20 17 04 59 05 24 06 02 19 31 00 05 05 05 9.5 0.8 8 0259+1143 TUE SEP 28 18 23 19 01 19 26 21 06 04 59 05 25 06 02 19 34 00 09 05 09 9.6 1.7 17 0357+1530 WED SEP 29 18 22 19 00 19 26 21 57 04 59 05 25 06 02 19 38 00 13 05 13 9.6 2.5 26 0456+1820 THU SEP 30 18 22 18 59 19 25 22 52 04 59 05 25 06 03 19 41 00 17 05 17 9.6 3.5 36 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