KECK OBSERVATORY CALENDAR FOR 2004 -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 2004 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight THU APR 01 18 46 19 24 19 50 04 47 05 01 05 27 06 05 07 46 12 22 17 50 10.1 0.7 6 1034+1406 FRI APR 02 18 46 19 24 19 50 16 14 05 25 05 00 05 26 06 04 07 50 12 26 17 53 10.0 0.0 0 1124+0821 SAT APR 03 18 47 19 25 19 51 17 11 06 02 04 59 05 25 06 03 07 55 12 30 17 56 10.0 0.0 0 1214+0203 SUN APR 04 18 47 19 25 19 51 18 09 06 41 04 58 05 24 06 02 07 59 12 34 17 59 10.0 0.0 0 1304-0429 MON APR 05 18 47 19 25 19 52 19 08 07 21 04 57 05 23 06 01 08 02 12 38 18 02 10.0 0.0 0 1356-1055 TUE APR 06 18 48 19 26 19 52 20 10 04 56 05 22 06 00 08 07 12 42 18 05 9.9 0.7 7 1451-1651 WED APR 07 18 48 19 26 19 52 21 15 04 55 05 21 06 00 08 11 12 46 18 08 9.9 1.8 18 1550-2149 THU APR 08 18 48 19 26 19 53 22 21 04 54 05 20 05 59 08 15 12 50 18 11 9.9 2.9 29 1651-2525 FRI APR 09 18 48 19 27 19 53 23 28 04 53 05 20 05 58 08 20 12 54 18 15 9.9 4.0 40 1755-2719 SAT APR 10 18 49 19 27 19 53 00 31 04 52 05 19 05 57 08 24 12 58 18 18 9.9 5.1 51 1859-2723 SUN APR 11 18 49 19 27 19 54 01 29 04 51 05 18 05 56 08 28 13 02 18 21 9.8 6.0 61 2002-2541 MON APR 12 18 49 19 28 19 54 02 20 04 50 05 17 05 55 08 33 13 06 18 24 9.8 6.9 69 2100-2228 TUE APR 13 18 50 19 28 19 55 03 05 04 50 05 16 05 55 08 37 13 10 18 27 9.8 7.6 77 2155-1805 WED APR 14 18 50 19 28 19 55 03 45 04 49 05 15 05 54 08 41 13 14 18 30 9.8 8.3 84 2246-1253 THU APR 15 18 50 19 29 19 56 04 21 04 48 05 14 05 53 08 46 13 18 18 33 9.7 8.9 90 2333-0712 FRI APR 16 18 51 19 29 19 56 04 55 16 47 04 47 05 14 05 52 08 50 13 22 18 36 9.7 9.4 96 0019-0119 SAT APR 17 18 51 19 30 19 56 05 28 17 38 04 46 05 13 05 51 08 55 13 26 18 39 9.7 9.7 100 0104+0431 SUN APR 18 18 51 19 30 19 57 06 02 18 30 04 45 05 12 05 51 08 59 13 29 18 42 9.7 9.7 100 0149+1007 MON APR 19 18 51 19 30 19 57 06 37 19 21 04 44 05 11 05 50 09 03 13 33 18 45 9.7 9.7 100 0235+1514 TUE APR 20 18 52 19 31 19 58 07 14 20 13 04 43 05 10 05 49 09 08 13 37 18 48 9.7 8.9 92 0322+1942 WED APR 21 18 52 19 31 19 58 07 55 21 07 04 42 05 09 05 48 09 12 13 41 18 51 9.6 8.0 83 0412+2319 THU APR 22 18 52 19 32 19 59 22 01 04 42 05 09 05 48 09 17 13 45 18 55 9.6 7.1 74 0503+2555 FRI APR 23 18 53 19 32 19 59 22 54 04 41 05 08 05 47 09 20 13 49 18 58 9.6 6.2 64 0555+2721 SAT APR 24 18 53 19 32 20 00 23 46 04 40 05 07 05 46 09 24 13 53 19 01 9.6 5.4 55 0649+2732 SUN APR 25 18 53 19 33 20 00 00 35 04 39 05 06 05 46 09 29 13 57 19 04 9.6 4.5 47 0742+2626 MON APR 26 18 54 19 33 20 01 01 21 04 38 05 06 05 45 09 33 14 01 19 08 9.6 3.7 39 0834+2407 TUE APR 27 18 54 19 34 20 01 02 03 04 37 05 05 05 44 09 38 14 05 19 11 9.5 3.0 31 0925+2039 WED APR 28 18 55 19 34 20 02 02 42 04 37 05 04 05 44 09 42 14 09 19 14 9.5 2.4 24 1015+1610 THU APR 29 18 55 19 35 20 02 03 19 04 36 05 03 05 43 09 47 14 13 19 17 9.5 1.7 18 1104+1049 FRI APR 30 18 55 19 35 20 03 03 56 04 35 05 03 05 42 09 51 14 17 19 21 9.5 1.1 11 1153+0448 ONE LINE REFERS TO EVENING DATE FULL MOON APR 05 11:05 UT AND FOLLOWING MORNING. LAST QUARTER APR 12 03:50 UT All dates and times are zone HST NEW MOON APR 19 13:23 UT in upper table (except sid time). FIRST QUARTER APR 27 17:35 UT