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 THU JUL 01 19 16 19 58 20 29 21 21 04 23 04 53 05 35 14 47 18 18 22 42 7.9 0.9 10 2135-1507 FRI JUL 02 19 16 19 59 20 29 22 05 04 23 04 53 05 36 14 50 18 22 22 46 7.9 1.6 20 2226-1146 SAT JUL 03 19 16 19 59 20 29 22 47 04 24 04 54 05 36 14 54 18 26 22 51 7.9 2.3 29 2316-0747 SUN JUL 04 19 16 19 59 20 28 23 29 04 24 04 54 05 36 14 57 18 30 22 55 7.9 3.0 38 0007-0322 MON JUL 05 19 16 19 58 20 28 00 11 04 24 04 54 05 37 15 01 18 34 22 59 7.9 3.7 46 0058+0119 TUE JUL 06 19 16 19 58 20 28 00 54 04 25 04 55 05 37 15 05 18 38 23 04 7.9 4.4 55 0151+0603 WED JUL 07 19 16 19 58 20 28 01 39 04 25 04 55 05 37 15 09 18 42 23 08 7.9 5.2 65 0245+1033 THU JUL 08 19 16 19 58 20 28 02 28 04 26 04 56 05 38 15 13 18 46 23 12 8.0 6.0 75 0343+1431 FRI JUL 09 19 16 19 58 20 28 03 21 16 05 04 26 04 56 05 38 15 17 18 50 23 16 8.0 6.9 86 0443+1738 SAT JUL 10 19 16 19 58 20 28 04 18 17 09 04 27 04 56 05 39 15 21 18 54 23 21 8.0 7.8 98 0545+1936 SUN JUL 11 19 16 19 58 20 28 05 19 18 13 04 27 04 57 05 39 15 25 18 58 23 25 8.0 8.0 100 0648+2012 MON JUL 12 19 16 19 58 20 27 06 22 19 13 04 28 04 57 05 39 15 28 19 02 23 30 8.0 8.0 100 0751+1925 TUE JUL 13 19 16 19 58 20 27 07 24 20 09 04 28 04 58 05 40 15 32 19 05 23 34 8.0 8.0 100 0851+1723 WED JUL 14 19 15 19 57 20 27 21 01 04 29 04 58 05 40 15 36 19 09 23 39 8.0 7.5 92 0948+1420 THU JUL 15 19 15 19 57 20 27 21 47 04 29 04 59 05 40 15 40 19 13 23 43 8.0 6.7 83 1042+1036 FRI JUL 16 19 15 19 57 20 26 22 29 04 30 04 59 05 41 15 43 19 17 23 48 8.1 6.0 74 1133+0628 SAT JUL 17 19 15 19 57 20 26 23 09 04 30 05 00 05 41 15 47 19 21 23 52 8.1 5.4 66 1221+0209 SUN JUL 18 19 15 19 56 20 26 23 46 04 31 05 00 05 42 15 51 19 25 23 57 8.1 4.8 58 1308-0208 MON JUL 19 19 14 19 56 20 25 00 23 04 31 05 00 05 42 15 54 19 29 00 01 8.1 4.1 51 1354-0615 TUE JUL 20 19 14 19 56 20 25 01 01 04 32 05 01 05 42 15 57 19 33 00 06 8.1 3.5 43 1439-1003 WED JUL 21 19 14 19 55 20 24 01 39 04 32 05 01 05 43 16 00 19 37 00 10 8.1 2.9 35 1526-1325 THU JUL 22 19 13 19 55 20 24 02 20 04 33 05 02 05 43 16 04 19 41 00 15 8.2 2.2 27 1613-1614 FRI JUL 23 19 13 19 54 20 23 03 03 04 33 05 02 05 44 16 07 19 45 00 19 8.2 1.5 18 1702-1822 SAT JUL 24 19 13 19 54 20 23 16 04 03 49 04 34 05 03 05 44 16 11 19 49 00 24 8.2 0.8 9 1753-1943 SUN JUL 25 19 12 19 54 20 23 16 54 04 37 04 34 05 03 05 44 16 15 19 53 00 28 8.2 0.0 0 1844-2012 MON JUL 26 19 12 19 53 20 22 17 44 05 28 04 35 05 04 05 45 16 18 19 57 00 32 8.2 0.0 0 1937-1943 TUE JUL 27 19 12 19 53 20 21 18 32 06 21 04 35 05 04 05 45 16 21 20 01 00 36 8.2 0.0 0 2029-1816 WED JUL 28 19 11 19 52 20 21 19 19 07 15 04 36 05 05 05 46 16 25 20 05 00 41 8.2 0.0 0 2122-1554 THU JUL 29 19 11 19 52 20 20 20 04 04 36 05 05 05 46 16 28 20 09 00 45 8.3 0.0 0 2213-1242 FRI JUL 30 19 10 19 51 20 20 20 47 04 37 05 06 05 46 16 32 20 12 00 50 8.3 0.4 5 2305-0849 SAT JUL 31 19 10 19 51 20 19 21 29 04 38 05 06 05 47 16 35 20 16 00 55 8.3 1.2 14 2355-0427 ONE LINE REFERS TO EVENING DATE LAST QUARTER JUL 06 11:59 UT AND FOLLOWING MORNING. NEW MOON JUL 13 02:27 UT All dates and times are zone HST FIRST QUARTER JUL 20 09:04 UT in upper table (except sid time). FULL MOON JUL 28 11:28 UT