KECK OBSERVATORY CALENDAR FOR 2007 -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 2007 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight SUN APR 01 18 46 19 24 19 50 17 57 06 21 05 02 05 28 06 05 07 43 12 20 17 49 10.1 0.0 0 1233-0554 MON APR 02 18 46 19 24 19 50 18 45 06 52 05 01 05 27 06 05 07 47 12 24 17 51 10.1 0.0 0 1315-1120 TUE APR 03 18 46 19 24 19 50 19 34 07 26 05 00 05 26 06 04 07 51 12 27 17 54 10.0 0.2 1 1400-1621 WED APR 04 18 47 19 25 19 51 20 25 04 59 05 25 06 03 07 56 12 31 17 57 10.0 1.0 9 1446-2047 THU APR 05 18 47 19 25 19 51 21 18 04 58 05 24 06 02 08 00 12 35 18 00 10.0 1.9 18 1536-2424 FRI APR 06 18 47 19 25 19 52 22 12 04 57 05 23 06 01 08 04 12 39 18 03 10.0 2.8 27 1628-2700 SAT APR 07 18 48 19 26 19 52 23 08 04 56 05 22 06 00 08 09 12 43 18 06 9.9 3.7 37 1723-2821 SUN APR 08 18 48 19 26 19 52 00 02 04 55 05 21 06 00 08 12 12 47 18 09 9.9 4.6 46 1819-2818 MON APR 09 18 48 19 26 19 53 00 55 04 54 05 20 05 59 08 16 12 51 18 12 9.9 5.5 55 1917-2645 TUE APR 10 18 48 19 27 19 53 01 44 04 53 05 20 05 58 08 21 12 55 18 16 9.9 6.3 63 2013-2342 WED APR 11 18 49 19 27 19 53 02 30 04 52 05 19 05 57 08 25 12 59 18 19 9.9 7.0 71 2108-1918 THU APR 12 18 49 19 27 19 54 03 12 04 51 05 18 05 56 08 29 13 03 18 22 9.8 7.7 78 2202-1343 FRI APR 13 18 49 19 28 19 54 03 52 04 50 05 17 05 55 08 34 13 07 18 25 9.8 8.4 85 2254-0714 SAT APR 14 18 50 19 28 19 55 04 32 16 22 04 50 05 16 05 55 08 38 13 11 18 28 9.8 9.1 92 2347-0013 SUN APR 15 18 50 19 28 19 55 05 12 17 24 04 49 05 15 05 54 08 42 13 15 18 31 9.8 9.7 99 0040+0656 MON APR 16 18 50 19 29 19 56 05 55 18 28 04 48 05 14 05 53 08 47 13 19 18 34 9.7 9.7 100 0136+1345 TUE APR 17 18 51 19 29 19 56 06 42 19 35 04 47 05 14 05 52 08 51 13 23 18 38 9.7 9.6 98 0234+1944 WED APR 18 18 51 19 30 19 56 07 34 20 43 04 46 05 13 05 51 08 56 13 27 18 40 9.7 8.5 87 0336+2424 THU APR 19 18 51 19 30 19 57 21 52 04 45 05 12 05 51 09 00 13 31 18 43 9.7 7.3 75 0440+2722 FRI APR 20 18 51 19 30 19 57 22 58 04 44 05 11 05 50 09 04 13 35 18 46 9.7 6.2 64 0544+2826 SAT APR 21 18 52 19 31 19 58 23 58 04 43 05 10 05 49 09 09 13 38 18 49 9.7 5.2 53 0646+2740 SUN APR 22 18 52 19 31 19 58 00 51 04 42 05 09 05 48 09 13 13 42 18 52 9.6 4.3 44 0745+2519 MON APR 23 18 52 19 32 19 59 01 36 04 42 05 09 05 48 09 18 13 46 18 56 9.6 3.6 36 0839+2143 TUE APR 24 18 53 19 32 19 59 02 15 04 41 05 08 05 47 09 22 13 50 18 59 9.6 2.9 30 0928+1714 WED APR 25 18 53 19 32 20 00 02 50 04 40 05 07 05 46 09 25 13 54 19 02 9.6 2.3 23 1015+1209 THU APR 26 18 53 19 33 20 00 03 22 04 39 05 06 05 46 09 30 13 58 19 05 9.6 1.7 18 1058+0642 FRI APR 27 18 54 19 33 20 01 03 52 04 38 05 06 05 45 09 34 14 02 19 09 9.6 1.2 12 1140+0104 SAT APR 28 18 54 19 34 20 01 04 23 04 37 05 05 05 44 09 39 14 06 19 12 9.5 0.7 7 1222-0432 SUN APR 29 18 55 19 34 20 02 16 42 04 54 04 37 05 04 05 44 09 43 14 10 19 15 9.5 0.2 1 1304-1000 MON APR 30 18 55 19 35 20 02 17 30 05 27 04 36 05 03 05 43 09 48 14 14 19 18 9.5 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