KECK OBSERVATORY CALENDAR FOR 2006 -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 2006 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight SAT APR 01 18 46 19 24 19 50 22 39 05 02 05 28 06 05 08 10 12 21 17 23 9.2 6.4 69 0416+2606 SUN APR 02 18 46 19 24 19 50 23 41 05 01 05 27 06 05 08 14 12 25 17 26 9.2 5.3 58 0515+2811 MON APR 03 18 46 19 24 19 50 00 39 05 00 05 26 06 04 08 18 12 28 17 29 9.2 4.4 47 0613+2841 TUE APR 04 18 47 19 25 19 51 01 32 04 59 05 25 06 03 08 23 12 32 17 32 9.1 3.5 37 0710+2740 WED APR 05 18 47 19 25 19 51 02 18 04 58 05 24 06 02 08 27 12 36 17 35 9.1 2.7 29 0803+2521 THU APR 06 18 47 19 25 19 52 02 59 04 57 05 23 06 01 08 32 12 40 17 38 9.1 2.0 21 0853+2156 FRI APR 07 18 48 19 26 19 52 03 36 04 56 05 22 06 00 08 36 12 44 17 41 9.1 1.3 14 0940+1741 SAT APR 08 18 48 19 26 19 52 04 09 04 55 05 21 06 00 08 39 12 48 17 44 9.0 0.8 8 1025+1246 SUN APR 09 18 48 19 26 19 53 04 40 04 54 05 20 05 59 08 44 12 52 17 47 9.0 0.2 2 1108+0724 MON APR 10 18 48 19 27 19 53 16 24 05 11 04 53 05 20 05 58 08 48 12 56 17 50 9.0 0.0 0 1150+0145 TUE APR 11 18 49 19 27 19 53 17 12 05 41 04 52 05 19 05 57 08 52 13 00 17 53 9.0 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 57 13 04 17 56 9.0 0.0 0 1316-0941 THU APR 13 18 49 19 28 19 54 18 51 06 48 04 50 05 17 05 55 09 01 13 08 17 59 8.9 0.0 0 1401-1506 FRI APR 14 18 50 19 28 19 55 19 44 07 27 04 50 05 16 05 55 09 06 13 12 18 03 8.9 0.0 0 1449-1958 SAT APR 15 18 50 19 28 19 55 20 41 04 49 05 15 05 54 09 10 13 16 18 06 8.9 0.8 8 1541-2402 SUN APR 16 18 50 19 29 19 56 21 39 04 48 05 14 05 53 09 15 13 20 18 08 8.9 1.7 19 1637-2658 MON APR 17 18 51 19 29 19 56 22 40 04 47 05 14 05 52 09 19 13 24 18 11 8.9 2.7 30 1736-2830 TUE APR 18 18 51 19 30 19 56 23 39 04 46 05 13 05 51 09 23 13 28 18 14 8.8 3.7 42 1837-2823 WED APR 19 18 51 19 30 19 57 00 35 04 45 05 12 05 51 09 28 13 32 18 17 8.8 4.6 52 1938-2634 THU APR 20 18 51 19 30 19 57 01 27 04 44 05 11 05 50 09 32 13 35 18 20 8.8 5.5 62 2037-2307 FRI APR 21 18 52 19 31 19 58 02 13 04 43 05 10 05 49 09 37 13 39 18 23 8.7 6.2 71 2134-1816 SAT APR 22 18 52 19 31 19 58 02 56 04 42 05 09 05 48 09 41 13 43 18 26 8.7 7.0 79 2228-1219 SUN APR 23 18 52 19 32 19 59 03 36 04 42 05 09 05 48 09 46 13 47 18 30 8.7 7.6 87 2321-0539 MON APR 24 18 53 19 32 19 59 04 14 16 09 04 41 05 08 05 47 09 50 13 51 18 33 8.7 8.2 94 0012+0121 TUE APR 25 18 53 19 32 20 00 04 53 17 10 04 40 05 07 05 46 09 55 13 55 18 36 8.7 8.7 100 0105+0819 WED APR 26 18 53 19 33 20 00 05 34 18 12 04 39 05 06 05 46 09 58 13 59 18 39 8.7 8.7 100 0158+1447 THU APR 27 18 54 19 33 20 01 06 18 19 15 04 38 05 06 05 45 10 03 14 03 18 42 8.6 8.6 100 0254+2021 FRI APR 28 18 54 19 34 20 01 07 07 20 19 04 37 05 05 05 44 10 07 14 07 18 45 8.6 8.3 96 0352+2440 SAT APR 29 18 55 19 34 20 02 08 00 21 24 04 37 05 04 05 44 10 12 14 11 18 49 8.6 7.2 84 0451+2727 SUN APR 30 18 55 19 35 20 02 22 25 04 36 05 03 05 43 10 16 14 15 18 52 8.6 6.2 72 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