KECK OBSERVATORY CALENDAR FOR 2006 -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 2006 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight SAT APR 01 18 46 19 24 19 50 22 39 05 02 05 28 06 05 07 44 12 21 17 49 10.1 6.8 67 0416+2606 SUN APR 02 18 46 19 24 19 50 23 41 05 01 05 27 06 05 07 48 12 25 17 52 10.1 5.8 57 0515+2811 MON APR 03 18 46 19 24 19 50 00 39 05 00 05 26 06 04 07 52 12 28 17 55 10.0 4.8 47 0613+2841 TUE APR 04 18 47 19 25 19 51 01 32 04 59 05 25 06 03 07 57 12 32 17 58 10.0 3.9 38 0710+2740 WED APR 05 18 47 19 25 19 51 02 18 04 58 05 24 06 02 08 01 12 36 18 01 10.0 3.1 31 0803+2521 THU APR 06 18 47 19 25 19 52 02 59 04 57 05 23 06 01 08 05 12 40 18 04 10.0 2.4 24 0853+2156 FRI APR 07 18 48 19 26 19 52 03 36 04 56 05 22 06 00 08 09 12 44 18 07 9.9 1.8 17 0940+1741 SAT APR 08 18 48 19 26 19 52 04 09 04 55 05 21 06 00 08 13 12 48 18 10 9.9 1.2 12 1025+1246 SUN APR 09 18 48 19 26 19 53 04 40 04 54 05 20 05 59 08 17 12 52 18 13 9.9 0.7 6 1108+0724 MON APR 10 18 48 19 27 19 53 16 24 05 11 04 53 05 20 05 58 08 22 12 56 18 17 9.9 0.2 1 1150+0145 TUE APR 11 18 49 19 27 19 53 17 12 05 41 04 52 05 19 05 57 08 26 13 00 18 20 9.9 0.0 0 1232-0400 WED APR 12 18 49 19 27 19 54 18 01 06 14 04 51 05 18 05 56 08 30 13 04 18 23 9.8 0.0 0 1316-0941 THU APR 13 18 49 19 28 19 54 18 51 06 48 04 50 05 17 05 55 08 35 13 08 18 26 9.8 0.0 0 1401-1506 FRI APR 14 18 50 19 28 19 55 19 44 07 27 04 50 05 16 05 55 08 39 13 12 18 29 9.8 0.3 2 1449-1958 SAT APR 15 18 50 19 28 19 55 20 41 04 49 05 15 05 54 08 43 13 16 18 32 9.8 1.2 12 1541-2402 SUN APR 16 18 50 19 29 19 56 21 39 04 48 05 14 05 53 08 48 13 20 18 35 9.7 2.2 22 1637-2658 MON APR 17 18 51 19 29 19 56 22 40 04 47 05 14 05 52 08 52 13 24 18 38 9.7 3.2 32 1736-2830 TUE APR 18 18 51 19 30 19 56 23 39 04 46 05 13 05 51 08 57 13 28 18 41 9.7 4.1 42 1837-2823 WED APR 19 18 51 19 30 19 57 00 35 04 45 05 12 05 51 09 01 13 32 18 44 9.7 5.1 52 1938-2634 THU APR 20 18 51 19 30 19 57 01 27 04 44 05 11 05 50 09 05 13 35 18 47 9.7 6.0 61 2037-2307 FRI APR 21 18 52 19 31 19 58 02 13 04 43 05 10 05 49 09 10 13 39 18 50 9.7 6.7 69 2134-1816 SAT APR 22 18 52 19 31 19 58 02 56 04 42 05 09 05 48 09 14 13 43 18 53 9.6 7.4 76 2228-1219 SUN APR 23 18 52 19 32 19 59 03 36 04 42 05 09 05 48 09 19 13 47 18 57 9.6 8.1 83 2321-0539 MON APR 24 18 53 19 32 19 59 04 14 16 09 04 41 05 08 05 47 09 23 13 51 19 00 9.6 8.7 90 0012+0121 TUE APR 25 18 53 19 32 20 00 04 53 17 10 04 40 05 07 05 46 09 26 13 55 19 03 9.6 9.4 97 0105+0819 WED APR 26 18 53 19 33 20 00 05 34 18 12 04 39 05 06 05 46 09 31 13 59 19 06 9.6 9.6 100 0158+1447 THU APR 27 18 54 19 33 20 01 06 18 19 15 04 38 05 06 05 45 09 35 14 03 19 10 9.6 9.6 100 0254+2021 FRI APR 28 18 54 19 34 20 01 07 07 20 19 04 37 05 05 05 44 09 40 14 07 19 13 9.5 8.8 92 0352+2440 SAT APR 29 18 55 19 34 20 02 08 00 21 24 04 37 05 04 05 44 09 44 14 11 19 16 9.5 7.7 80 0451+2727 SUN APR 30 18 55 19 35 20 02 22 25 04 36 05 03 05 43 09 49 14 15 19 19 9.5 6.6 70 0551+2835 ONE LINE REFERS TO EVENING DATE FIRST QUARTER APR 05 12:03 UT AND FOLLOWING MORNING. FULL MOON APR 13 16:45 UT All dates and times are zone HST LAST QUARTER APR 21 03:31 UT in upper table (except sid time). NEW MOON APR 27 19:47 UT