KECK OBSERVATORY CALENDAR FOR 1998 -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 1998 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 12 12 h h % midnight WED JUL 01 19 16 19 58 20 29 00 57 04 23 04 53 05 35 14 16 18 19 23 13 8.9 3.9 44 1312-0346 THU JUL 02 19 16 19 59 20 29 01 34 04 23 04 53 05 36 14 21 18 23 23 17 8.9 3.3 37 1358-0728 FRI JUL 03 19 16 19 59 20 29 02 12 04 24 04 54 05 36 14 25 18 27 23 22 8.9 2.7 30 1444-1053 SAT JUL 04 19 16 19 59 20 28 02 52 04 24 04 54 05 36 14 29 18 31 23 26 8.9 2.0 22 1532-1354 SUN JUL 05 19 16 19 58 20 28 03 36 04 24 04 54 05 37 14 32 18 35 23 30 8.9 1.3 14 1622-1621 MON JUL 06 19 16 19 58 20 28 16 32 04 23 04 25 04 55 05 37 14 36 18 39 23 35 8.9 0.5 5 1714-1805 TUE JUL 07 19 16 19 58 20 28 17 25 05 14 04 25 04 55 05 37 14 40 18 43 23 39 8.9 0.0 0 1808-1857 WED JUL 08 19 16 19 58 20 28 18 19 06 08 04 26 04 56 05 38 14 44 18 47 23 43 9.0 0.0 0 1903-1850 THU JUL 09 19 16 19 58 20 28 19 11 07 04 04 26 04 56 05 38 14 48 18 51 23 47 9.0 0.0 0 1959-1740 FRI JUL 10 19 16 19 58 20 28 20 02 04 27 04 56 05 39 14 52 18 55 23 51 9.0 0.1 0 2055-1529 SAT JUL 11 19 16 19 58 20 28 20 52 04 27 04 57 05 39 14 56 18 59 23 56 9.0 0.9 10 2151-1224 SUN JUL 12 19 16 19 58 20 27 21 39 04 28 04 57 05 39 15 00 19 02 00 00 9.0 1.7 18 2245-0835 MON JUL 13 19 16 19 58 20 27 22 24 04 28 04 58 05 40 15 04 19 06 00 05 9.0 2.4 27 2339-0415 TUE JUL 14 19 15 19 57 20 27 23 08 04 29 04 58 05 40 15 07 19 10 00 09 9.0 3.2 35 0033+0018 WED JUL 15 19 15 19 57 20 27 23 53 04 29 04 59 05 40 15 11 19 14 00 14 9.0 3.9 43 0127+0452 THU JUL 16 19 15 19 57 20 26 00 38 04 30 04 59 05 41 15 15 19 18 00 18 9.0 4.7 51 0221+0910 FRI JUL 17 19 15 19 57 20 26 01 26 04 30 05 00 05 41 15 19 19 22 00 23 9.0 5.5 60 0317+1256 SAT JUL 18 19 15 19 56 20 26 02 15 04 31 05 00 05 42 15 21 19 26 00 27 9.1 6.3 69 0414+1557 SUN JUL 19 19 14 19 56 20 25 03 08 04 31 05 00 05 42 15 25 19 30 00 31 9.1 7.2 79 0512+1800 MON JUL 20 19 14 19 56 20 25 04 03 16 54 04 32 05 01 05 42 15 29 19 34 00 36 9.1 8.1 89 0610+1857 TUE JUL 21 19 14 19 55 20 24 04 59 17 51 04 32 05 01 05 43 15 32 19 38 00 40 9.1 9.1 99 0708+1846 WED JUL 22 19 13 19 55 20 24 05 55 18 44 04 33 05 02 05 43 15 36 19 42 00 45 9.1 9.1 100 0804+1731 THU JUL 23 19 13 19 54 20 23 06 51 19 33 04 33 05 02 05 44 15 39 19 46 00 49 9.1 9.1 100 0858+1522 FRI JUL 24 19 13 19 54 20 23 07 45 20 19 04 34 05 03 05 44 15 43 19 50 00 54 9.2 8.7 95 0950+1229 SAT JUL 25 19 12 19 54 20 23 21 01 04 34 05 03 05 44 15 47 19 54 00 58 9.2 8.0 87 1039+0906 SUN JUL 26 19 12 19 53 20 22 21 40 04 35 05 04 05 45 15 50 19 58 01 02 9.2 7.4 80 1126+0523 MON JUL 27 19 12 19 53 20 21 22 18 04 35 05 04 05 45 15 54 20 02 01 06 9.2 6.8 73 1212+0131 TUE JUL 28 19 11 19 52 20 21 22 54 04 36 05 05 05 46 15 57 20 06 01 11 9.2 6.2 67 1258-0221 WED JUL 29 19 11 19 52 20 20 23 31 04 36 05 05 05 46 16 01 20 09 01 15 9.2 5.6 60 1343-0607 THU JUL 30 19 10 19 51 20 20 00 09 04 37 05 06 05 46 16 04 20 13 01 20 9.2 4.9 53 1428-0938 FRI JUL 31 19 10 19 51 20 19 00 48 04 38 05 06 05 47 16 08 20 17 01 24 9.2 4.3 46 1515-1247 ONE LINE REFERS TO EVENING DATE FIRST QUARTER JUL 01 18:46 UT AND FOLLOWING MORNING. FULL MOON JUL 09 16:03 UT All dates and times are zone HST LAST QUARTER JUL 16 15:16 UT in upper table (except sid time). NEW MOON JUL 23 13:45 UT FIRST QUARTER JUL 31 12:08 UT