KECK OBSERVATORY CALENDAR FOR 2001 -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 2001 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight SAT SEP 01 18 48 19 26 19 52 18 10 06 10 04 52 05 18 05 56 18 16 22 25 03 17 9.0 0.0 0 2236-1333 SUN SEP 02 18 47 19 25 19 52 18 47 06 59 04 52 05 18 05 57 18 20 22 29 03 21 9.0 0.0 0 2321-0922 MON SEP 03 18 46 19 24 19 51 19 22 07 48 04 52 05 19 05 57 18 23 22 32 03 25 9.0 0.0 0 0006-0448 TUE SEP 04 18 45 19 23 19 50 19 56 04 53 05 19 05 57 18 26 22 36 03 30 9.0 0.1 1 0050-0001 WED SEP 05 18 44 19 22 19 49 20 30 04 53 05 19 05 57 18 29 22 40 03 34 9.1 0.7 7 0134+0448 THU SEP 06 18 43 19 21 19 48 21 06 04 53 05 19 05 57 18 32 22 44 03 38 9.1 1.3 14 0220+0931 FRI SEP 07 18 42 19 21 19 47 21 43 04 54 05 20 05 58 18 35 22 48 03 43 9.1 1.9 21 0308+1355 SAT SEP 08 18 42 19 20 19 46 22 24 04 54 05 20 05 58 18 38 22 52 03 47 9.1 2.6 28 0358+1747 SUN SEP 09 18 41 19 19 19 45 23 09 04 54 05 20 05 58 18 40 22 56 03 51 9.2 3.4 37 0452+2052 MON SEP 10 18 40 19 18 19 44 00 00 04 54 05 20 05 58 18 43 23 00 03 55 9.2 4.3 46 0549+2255 TUE SEP 11 18 39 19 17 19 43 00 57 04 55 05 21 05 59 18 46 23 04 04 00 9.2 5.2 56 0649+2340 WED SEP 12 18 38 19 16 19 42 01 59 04 55 05 21 05 59 18 49 23 08 04 04 9.2 6.3 68 0751+2255 THU SEP 13 18 37 19 15 19 41 03 04 16 01 04 55 05 21 05 59 18 52 23 12 04 08 9.2 7.4 79 0854+2036 FRI SEP 14 18 36 19 14 19 40 04 11 16 56 04 56 05 21 05 59 18 55 23 16 04 13 9.3 8.5 91 0955+1652 SAT SEP 15 18 35 19 13 19 39 05 16 17 46 04 56 05 22 05 59 18 58 23 20 04 17 9.3 9.3 100 1054+1158 SUN SEP 16 18 34 19 12 19 38 06 21 18 33 04 56 05 22 06 00 19 01 23 24 04 21 9.3 9.3 100 1151+0619 MON SEP 17 18 33 19 11 19 37 07 23 19 17 04 56 05 22 06 00 19 04 23 28 04 24 9.3 9.3 100 1246+0020 TUE SEP 18 18 32 19 10 19 36 20 01 04 57 05 22 06 00 19 07 23 32 04 29 9.3 8.9 95 1341-0532 WED SEP 19 18 32 19 09 19 35 20 44 04 57 05 23 06 00 19 10 23 36 04 33 9.4 8.2 87 1434-1059 THU SEP 20 18 31 19 08 19 34 21 28 04 57 05 23 06 00 19 13 23 40 04 37 9.4 7.5 79 1528-1541 FRI SEP 21 18 30 19 07 19 33 22 13 04 57 05 23 06 01 19 16 23 43 04 41 9.4 6.7 71 1622-1925 SAT SEP 22 18 29 19 06 19 32 23 01 04 58 05 23 06 01 19 19 23 47 04 46 9.4 6.0 63 1717-2203 SUN SEP 23 18 28 19 05 19 31 23 51 04 58 05 23 06 01 19 22 23 51 04 50 9.5 5.1 54 1811-2329 MON SEP 24 18 27 19 05 19 30 00 42 04 58 05 24 06 01 19 25 23 55 04 54 9.5 4.3 45 1905-2344 TUE SEP 25 18 26 19 04 19 29 01 33 04 58 05 24 06 01 19 27 23 59 04 58 9.5 3.4 36 1957-2252 WED SEP 26 18 25 19 03 19 28 02 25 04 59 05 24 06 02 19 30 00 03 05 03 9.5 2.6 26 2048-2058 THU SEP 27 18 24 19 02 19 27 03 16 04 59 05 24 06 02 19 33 00 07 05 07 9.5 1.7 18 2137-1811 FRI SEP 28 18 23 19 01 19 26 16 10 04 06 04 59 05 25 06 02 19 36 00 11 05 11 9.6 0.9 9 2224-1439 SAT SEP 29 18 22 19 00 19 26 16 47 04 56 04 59 05 25 06 02 19 40 00 15 05 15 9.6 0.1 0 2310-1032 SUN SEP 30 18 22 18 59 19 25 17 23 05 44 04 59 05 25 06 03 19 43 00 19 05 19 9.6 0.0 0 2354-0559 ONE LINE REFERS TO EVENING DATE FULL MOON SEP 02 21:46 UT AND FOLLOWING MORNING. LAST QUARTER SEP 10 19:03 UT All dates and times are zone HST NEW MOON SEP 17 10:30 UT in upper table (except sid time). FIRST QUARTER SEP 24 09:32 UT