KECK OBSERVATORY CALENDAR FOR 2011 -ASTRONOMICAL (computed for altitude 4160.0 m) ASTRONOMICAL(18 deg) TWILIGHT/DAWN MOON(midnight) DATE(HST) SUN TWILIGHT ENDS MOON MOON DAWN BEGINS SUN SIDEREAL TIMES NIGHT (18 deg) Zenith 2011 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ RA DEC Dist 12 18 18 12 18 18 h h % h m d m deg SAT OCT 01 18 21 18 58 19 24 22 14 05 00 05 25 06 03 19 44 00 21 05 22 9.6 6.8 70 1701-2258 >90 SUN OCT 02 18 20 18 57 19 23 23 13 05 00 05 26 06 03 19 47 00 25 05 26 9.6 5.8 60 1800-2227 >90 MON OCT 03 18 19 18 57 19 22 00 11 05 00 05 26 06 03 19 50 00 29 05 30 9.6 4.8 50 1900-2024 >90 TUE OCT 04 18 18 18 56 19 21 01 07 05 00 05 26 06 04 19 53 00 33 05 34 9.6 3.9 40 1951-1750 79 WED OCT 05 18 17 18 55 19 20 14 01 02 01 05 01 05 26 06 04 19 56 00 37 05 39 9.7 3.0 30 2041-1419 67 THU OCT 06 18 16 18 54 19 19 14 41 02 52 05 01 05 26 06 04 19 59 00 41 05 43 9.7 2.2 22 2130-1010 56 FRI OCT 07 18 16 18 53 19 19 15 18 03 42 05 01 05 27 06 04 20 03 00 45 05 47 9.7 1.3 13 2216-0540 45 SAT OCT 08 18 15 18 52 19 18 15 53 04 31 05 01 05 27 06 05 20 06 00 49 05 51 9.7 0.5 5 2301-0100 34 SUN OCT 09 18 14 18 52 19 17 16 28 05 19 05 02 05 27 06 05 20 09 00 53 05 56 9.8 0.0 0 2346 0341 23 MON OCT 10 18 13 18 51 19 16 17 02 06 08 05 02 05 27 06 05 20 12 00 57 05 59 9.8 0.0 0 0031 0811 13 TUE OCT 11 18 12 18 50 19 15 17 38 06 57 05 02 05 28 06 05 20 15 01 01 06 03 9.8 0.0 0 0116 1221 08 WED OCT 12 18 12 18 49 19 15 18 15 05 02 05 28 06 06 20 19 01 05 06 07 9.8 0.0 0 0204 1600 15 THU OCT 13 18 11 18 48 19 14 18 55 05 03 05 28 06 06 20 22 01 08 06 12 9.8 0.0 0 0253 1859 25 FRI OCT 14 18 10 18 48 19 13 19 38 05 03 05 29 06 06 20 25 01 12 06 16 9.8 0.4 4 0343 2108 35 SAT OCT 15 18 09 18 47 19 12 20 24 05 03 05 29 06 07 20 28 01 16 06 20 9.8 1.2 12 0435 2220 46 SUN OCT 16 18 08 18 46 19 12 21 14 05 04 05 29 06 07 20 32 01 20 06 25 9.9 2.0 20 0529 2228 58 MON OCT 17 18 08 18 46 19 11 22 06 05 04 05 29 06 07 20 34 01 24 06 29 9.9 2.9 29 0622 2129 69 TUE OCT 18 18 07 18 45 19 10 23 02 05 04 05 30 06 08 20 37 01 28 06 33 9.9 3.9 39 0715 1923 81 WED OCT 19 18 06 18 44 19 10 23 58 05 04 05 30 06 08 20 41 01 32 06 37 9.9 4.8 48 0803 1544 >90 THU OCT 20 18 06 18 43 19 09 00 56 05 05 05 30 06 08 20 44 01 36 06 42 9.9 5.8 58 0902 1215 >90 FRI OCT 21 18 05 18 43 19 08 01 54 14 15 05 05 05 31 06 09 20 47 01 40 06 46 10.0 6.8 68 0954 0727 >90 SAT OCT 22 18 04 18 42 19 08 02 54 14 57 05 05 05 31 06 09 20 51 01 44 06 50 10.0 7.8 78 1047 0207 >90 SUN OCT 23 18 04 18 42 19 07 03 55 15 40 05 06 05 31 06 09 20 54 01 48 06 55 10.0 8.8 88 1140-0327 >90 MON OCT 24 18 03 18 41 19 07 04 59 16 25 05 06 05 32 06 10 20 58 01 52 06 59 10.0 9.9 98 1236-0857 >90 TUE OCT 25 18 02 18 40 19 06 06 04 17 13 05 06 05 32 06 10 21 01 01 56 07 03 10.0 10.0 100 1334-1359 >90 WED OCT 26 18 02 18 40 19 06 18 04 05 07 05 32 06 10 21 05 02 00 07 08 10.0 10.0 100 1434-1808 >90 THU OCT 27 18 01 18 39 19 05 19 00 05 07 05 33 06 11 21 08 02 04 07 12 10.0 10.0 100 1536-2104 >90 FRI OCT 28 18 00 18 39 19 05 19 59 05 07 05 33 06 11 21 12 02 08 07 15 10.0 9.1 91 1638-2231 >90 SAT OCT 29 18 00 18 38 19 04 21 00 05 08 05 33 06 12 21 15 02 12 07 20 10.1 8.1 80 1740-2228 >90 SUN OCT 30 17 59 18 38 19 04 22 01 05 08 05 34 06 12 21 19 02 16 07 24 10.1 7.1 70 1839-2101 >90 MON OCT 31 17 59 18 37 19 03 22 59 05 08 05 34 06 13 21 22 02 19 07 28 10.1 6.1 60 1935-1827 >90 ONE LINE REFERS TO EVENING DATE FIRST QUARTER Oct 04 03:13 UT AND FOLLOWING MORNING. FULL MOON Oct 12 02:06 UT All dates and times are zone HST LAST QUARTER Oct 20 03:32 UT in upper table (except sid time). NEW MOON Oct 26 19:57 UT