KECK OBSERVATORY CALENDAR FOR 2007 -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 2007 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight SUN APR 01 18 46 19 24 19 50 17 57 06 21 05 02 05 28 06 05 08 09 12 20 17 22 9.2 0.0 0 1233-0554 MON APR 02 18 46 19 24 19 50 18 45 06 52 05 01 05 27 06 05 08 13 12 24 17 25 9.2 0.0 0 1315-1120 TUE APR 03 18 46 19 24 19 50 19 34 07 26 05 00 05 26 06 04 08 17 12 27 17 28 9.2 0.0 0 1400-1621 WED APR 04 18 47 19 25 19 51 20 25 04 59 05 25 06 03 08 22 12 31 17 31 9.1 0.6 6 1446-2047 THU APR 05 18 47 19 25 19 51 21 18 04 58 05 24 06 02 08 26 12 35 17 34 9.1 1.4 15 1536-2424 FRI APR 06 18 47 19 25 19 52 22 12 04 57 05 23 06 01 08 31 12 39 17 37 9.1 2.3 25 1628-2700 SAT APR 07 18 48 19 26 19 52 23 08 04 56 05 22 06 00 08 35 12 43 17 40 9.1 3.3 36 1723-2821 SUN APR 08 18 48 19 26 19 52 00 02 04 55 05 21 06 00 08 39 12 47 17 43 9.0 4.2 46 1819-2818 MON APR 09 18 48 19 26 19 53 00 55 04 54 05 20 05 59 08 43 12 51 17 46 9.0 5.0 55 1917-2645 TUE APR 10 18 48 19 27 19 53 01 44 04 53 05 20 05 58 08 47 12 55 17 49 9.0 5.9 65 2013-2342 WED APR 11 18 49 19 27 19 53 02 30 04 52 05 19 05 57 08 51 12 59 17 52 9.0 6.6 73 2108-1918 THU APR 12 18 49 19 27 19 54 03 12 04 51 05 18 05 56 08 56 13 03 17 55 9.0 7.3 81 2202-1343 FRI APR 13 18 49 19 28 19 54 03 52 04 50 05 17 05 55 09 00 13 07 17 58 8.9 8.0 89 2254-0714 SAT APR 14 18 50 19 28 19 55 04 32 16 22 04 50 05 16 05 55 09 05 13 11 18 02 8.9 8.6 96 2347-0013 SUN APR 15 18 50 19 28 19 55 05 12 17 24 04 49 05 15 05 54 09 09 13 15 18 05 8.9 8.9 100 0040+0656 MON APR 16 18 50 19 29 19 56 05 55 18 28 04 48 05 14 05 53 09 14 13 19 18 08 8.9 8.9 100 0136+1345 TUE APR 17 18 51 19 29 19 56 06 42 19 35 04 47 05 14 05 52 09 18 13 23 18 10 8.9 8.9 100 0234+1944 WED APR 18 18 51 19 30 19 56 07 34 20 43 04 46 05 13 05 51 09 22 13 27 18 13 8.8 8.0 91 0336+2424 THU APR 19 18 51 19 30 19 57 21 52 04 45 05 12 05 51 09 27 13 31 18 16 8.8 6.9 78 0440+2722 FRI APR 20 18 51 19 30 19 57 22 58 04 44 05 11 05 50 09 31 13 35 18 19 8.8 5.8 65 0544+2826 SAT APR 21 18 52 19 31 19 58 23 58 04 43 05 10 05 49 09 36 13 38 18 22 8.7 4.7 54 0646+2740 SUN APR 22 18 52 19 31 19 58 00 51 04 42 05 09 05 48 09 40 13 42 18 25 8.7 3.8 44 0745+2519 MON APR 23 18 52 19 32 19 59 01 36 04 42 05 09 05 48 09 45 13 46 18 29 8.7 3.1 35 0839+2143 TUE APR 24 18 53 19 32 19 59 02 15 04 41 05 08 05 47 09 49 13 50 18 32 8.7 2.4 27 0928+1714 WED APR 25 18 53 19 32 20 00 02 50 04 40 05 07 05 46 09 54 13 54 18 35 8.7 1.8 21 1015+1209 THU APR 26 18 53 19 33 20 00 03 22 04 39 05 06 05 46 09 58 13 58 18 38 8.7 1.3 14 1058+0642 FRI APR 27 18 54 19 33 20 01 03 52 04 38 05 06 05 45 10 02 14 02 18 41 8.6 0.8 8 1140+0104 SAT APR 28 18 54 19 34 20 01 04 23 04 37 05 05 05 44 10 06 14 06 18 44 8.6 0.2 2 1222-0432 SUN APR 29 18 55 19 34 20 02 16 42 04 54 04 37 05 04 05 44 10 11 14 10 18 48 8.6 0.0 0 1304-1000 MON APR 30 18 55 19 35 20 02 17 30 05 27 04 36 05 03 05 43 10 15 14 14 18 51 8.6 0.0 0 1348-1507 ONE LINE REFERS TO EVENING DATE FULL MOON APR 02 17:17 UT AND FOLLOWING MORNING. LAST QUARTER APR 10 18:09 UT All dates and times are zone HST NEW MOON APR 17 11:37 UT in upper table (except sid time). FIRST QUARTER APR 24 06:38 UT