KECK OBSERVATORY CALENDAR FOR 2000 -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 2000 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight FRI SEP 01 18 47 19 25 19 52 21 37 04 52 05 18 05 57 17 50 22 26 03 44 9.9 7.7 77 1411-0751 SAT SEP 02 18 46 19 24 19 51 22 17 04 52 05 19 05 57 17 53 22 30 03 49 9.9 7.0 70 1500-1210 SUN SEP 03 18 45 19 23 19 50 22 59 04 53 05 19 05 57 17 56 22 33 03 53 9.9 6.3 63 1550-1549 MON SEP 04 18 44 19 22 19 49 23 41 04 53 05 19 05 57 17 59 22 37 03 57 9.9 5.6 56 1640-1841 TUE SEP 05 18 43 19 21 19 48 00 26 04 53 05 19 05 57 18 02 22 41 04 01 10.0 4.9 48 1730-2040 WED SEP 06 18 42 19 21 19 47 01 12 04 54 05 20 05 58 18 06 22 45 04 06 10.0 4.1 41 1821-2143 THU SEP 07 18 42 19 20 19 46 02 01 04 54 05 20 05 58 18 08 22 49 04 10 10.0 3.3 33 1912-2147 FRI SEP 08 18 41 19 19 19 45 02 51 04 54 05 20 05 58 18 11 22 53 04 14 10.0 2.5 24 2003-2053 SAT SEP 09 18 40 19 18 19 44 03 42 04 54 05 20 05 58 18 14 22 57 04 18 10.0 1.6 16 2053-1903 SUN SEP 10 18 39 19 17 19 43 16 41 04 33 04 55 05 21 05 59 18 17 23 01 04 23 10.1 0.8 7 2143-1621 MON SEP 11 18 38 19 16 19 42 17 22 05 25 04 55 05 21 05 59 18 20 23 05 04 27 10.1 0.0 0 2231-1253 TUE SEP 12 18 37 19 15 19 41 18 02 06 17 04 55 05 21 05 59 18 23 23 09 04 31 10.1 0.0 0 2319-0849 WED SEP 13 18 36 19 14 19 40 18 40 07 09 04 56 05 21 05 59 18 26 23 13 04 35 10.1 0.0 0 0007-0417 THU SEP 14 18 35 19 13 19 39 19 18 04 56 05 22 05 59 18 29 23 17 04 40 10.1 0.1 0 0055+0030 FRI SEP 15 18 34 19 12 19 38 19 57 04 56 05 22 06 00 18 32 23 21 04 44 10.2 0.8 7 0144+0521 SAT SEP 16 18 33 19 11 19 37 20 37 04 56 05 22 06 00 18 35 23 25 04 48 10.2 1.4 14 0234+1002 SUN SEP 17 18 32 19 10 19 36 21 19 04 57 05 22 06 00 18 38 23 29 04 52 10.2 2.2 21 0326+1417 MON SEP 18 18 32 19 09 19 35 22 05 04 57 05 23 06 00 18 41 23 33 04 56 10.2 2.9 28 0421+1750 TUE SEP 19 18 31 19 08 19 34 22 56 04 57 05 23 06 00 18 44 23 37 05 00 10.2 3.8 37 0519+2025 WED SEP 20 18 30 19 07 19 33 23 51 04 57 05 23 06 01 18 47 23 40 05 04 10.3 4.7 46 0619+2148 THU SEP 21 18 29 19 06 19 32 00 50 04 58 05 23 06 01 18 50 23 44 05 08 10.3 5.7 55 0720+2149 FRI SEP 22 18 28 19 05 19 31 01 53 04 58 05 23 06 01 18 53 23 48 05 12 10.3 6.8 66 0821+2024 SAT SEP 23 18 27 19 05 19 30 02 56 04 58 05 24 06 01 18 56 23 52 05 17 10.3 7.8 76 0921+1741 SUN SEP 24 18 26 19 04 19 29 03 59 16 35 04 58 05 24 06 01 18 59 23 56 05 21 10.3 8.9 86 1019+1351 MON SEP 25 18 25 19 03 19 28 05 00 17 23 04 59 05 24 06 02 19 02 00 00 05 25 10.4 10.0 96 1115+0913 TUE SEP 26 18 24 19 02 19 27 05 59 18 07 04 59 05 24 06 02 19 05 00 04 05 29 10.4 10.4 100 1208+0408 WED SEP 27 18 23 19 01 19 26 06 56 18 49 04 59 05 25 06 02 19 08 00 08 05 34 10.4 10.4 100 1300-0103 THU SEP 28 18 22 19 00 19 26 07 52 19 29 04 59 05 25 06 02 19 11 00 12 05 38 10.4 9.9 95 1351-0606 FRI SEP 29 18 22 18 59 19 25 20 10 04 59 05 25 06 03 19 14 00 16 05 42 10.4 9.3 88 1441-1044 SAT SEP 30 18 21 18 58 19 24 20 52 05 00 05 25 06 03 19 17 00 20 05 46 10.4 8.5 81 1531-1445 ONE LINE REFERS TO EVENING DATE FIRST QUARTER SEP 05 16:31 UT AND FOLLOWING MORNING. FULL MOON SEP 13 19:40 UT All dates and times are zone HST LAST QUARTER SEP 21 01:32 UT in upper table (except sid time). NEW MOON SEP 27 19:56 UT