KECK OBSERVATORY CALENDAR FOR 2004 -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 2004 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight THU APR 01 18 46 19 24 19 50 04 47 05 01 05 27 06 05 08 12 12 22 17 24 9.2 0.2 2 1034+1406 FRI APR 02 18 46 19 24 19 50 16 14 05 25 05 00 05 26 06 04 08 16 12 26 17 27 9.2 0.0 0 1124+0821 SAT APR 03 18 47 19 25 19 51 17 11 06 02 04 59 05 25 06 03 08 21 12 30 17 30 9.1 0.0 0 1214+0203 SUN APR 04 18 47 19 25 19 51 18 09 06 41 04 58 05 24 06 02 08 25 12 34 17 33 9.1 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 30 12 38 17 36 9.1 0.0 0 1356-1055 TUE APR 06 18 48 19 26 19 52 20 10 04 56 05 22 06 00 08 34 12 42 17 39 9.1 0.3 3 1451-1651 WED APR 07 18 48 19 26 19 52 21 15 04 55 05 21 06 00 08 37 12 46 17 42 9.0 1.4 15 1550-2149 THU APR 08 18 48 19 26 19 53 22 21 04 54 05 20 05 59 08 42 12 50 17 45 9.0 2.5 27 1651-2525 FRI APR 09 18 48 19 27 19 53 23 28 04 53 05 20 05 58 08 46 12 54 17 48 9.0 3.6 39 1755-2719 SAT APR 10 18 49 19 27 19 53 00 31 04 52 05 19 05 57 08 50 12 58 17 51 9.0 4.6 51 1859-2723 SUN APR 11 18 49 19 27 19 54 01 29 04 51 05 18 05 56 08 55 13 02 17 54 9.0 5.6 62 2002-2541 MON APR 12 18 49 19 28 19 54 02 20 04 50 05 17 05 55 08 59 13 06 17 57 8.9 6.4 72 2100-2228 TUE APR 13 18 50 19 28 19 55 03 05 04 50 05 16 05 55 09 04 13 10 18 01 8.9 7.2 80 2155-1805 WED APR 14 18 50 19 28 19 55 03 45 04 49 05 15 05 54 09 08 13 14 18 04 8.9 7.8 88 2246-1253 THU APR 15 18 50 19 29 19 56 04 21 04 48 05 14 05 53 09 13 13 18 18 06 8.9 8.4 94 2333-0712 FRI APR 16 18 51 19 29 19 56 04 55 16 47 04 47 05 14 05 52 09 17 13 22 18 09 8.9 8.9 100 0019-0119 SAT APR 17 18 51 19 30 19 56 05 28 17 38 04 46 05 13 05 51 09 21 13 26 18 12 8.8 8.8 100 0104+0431 SUN APR 18 18 51 19 30 19 57 06 02 18 30 04 45 05 12 05 51 09 26 13 29 18 15 8.8 8.8 100 0149+1007 MON APR 19 18 51 19 30 19 57 06 37 19 21 04 44 05 11 05 50 09 30 13 33 18 18 8.8 8.8 100 0235+1514 TUE APR 20 18 52 19 31 19 58 07 14 20 13 04 43 05 10 05 49 09 35 13 37 18 21 8.7 8.5 97 0322+1942 WED APR 21 18 52 19 31 19 58 07 55 21 07 04 42 05 09 05 48 09 39 13 41 18 24 8.7 7.6 86 0412+2319 THU APR 22 18 52 19 32 19 59 22 01 04 42 05 09 05 48 09 44 13 45 18 28 8.7 6.7 76 0503+2555 FRI APR 23 18 53 19 32 19 59 22 54 04 41 05 08 05 47 09 48 13 49 18 31 8.7 5.8 66 0555+2721 SAT APR 24 18 53 19 32 20 00 23 46 04 40 05 07 05 46 09 52 13 53 18 34 8.7 4.9 56 0649+2732 SUN APR 25 18 53 19 33 20 00 00 35 04 39 05 06 05 46 09 56 13 57 18 37 8.7 4.1 47 0742+2626 MON APR 26 18 54 19 33 20 01 01 21 04 38 05 06 05 45 10 01 14 01 18 40 8.6 3.3 38 0834+2407 TUE APR 27 18 54 19 34 20 01 02 03 04 37 05 05 05 44 10 05 14 05 18 43 8.6 2.6 29 0925+2039 WED APR 28 18 55 19 34 20 02 02 42 04 37 05 04 05 44 10 10 14 09 18 47 8.6 1.9 22 1015+1610 THU APR 29 18 55 19 35 20 02 03 19 04 36 05 03 05 43 10 14 14 13 18 50 8.6 1.3 14 1104+1049 FRI APR 30 18 55 19 35 20 03 03 56 04 35 05 03 05 42 10 19 14 17 18 53 8.5 0.7 7 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