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 THU OCT 01 18 21 18 58 19 24 03 13 05 00 05 25 06 03 19 19 00 22 05 48 10.4 2.2 21 2141-1305 FRI OCT 02 18 20 18 57 19 23 04 13 05 00 05 25 06 03 19 22 00 26 05 52 10.5 1.2 11 2237-0917 SAT OCT 03 18 19 18 56 19 22 16 45 05 15 05 00 05 26 06 03 19 25 00 30 05 57 10.5 0.2 1 2334-0449 SUN OCT 04 18 18 18 56 19 21 17 32 06 18 05 00 05 26 06 04 19 29 00 34 06 01 10.5 0.0 0 0031+0003 MON OCT 05 18 17 18 55 19 20 18 20 07 21 05 01 05 26 06 04 19 32 00 38 06 04 10.5 0.0 0 0128+0458 TUE OCT 06 18 16 18 54 19 19 19 09 05 01 05 26 06 04 19 35 00 42 06 08 10.5 0.2 2 0227+0934 WED OCT 07 18 16 18 53 19 19 19 59 05 01 05 27 06 04 19 38 00 45 06 13 10.6 1.1 10 0326+1331 THU OCT 08 18 15 18 52 19 18 20 52 05 01 05 27 06 05 19 41 00 49 06 17 10.6 2.0 18 0426+1631 FRI OCT 09 18 14 18 51 19 17 21 46 05 02 05 27 06 05 19 44 00 53 06 21 10.6 2.9 27 0525+1824 SAT OCT 10 18 13 18 51 19 16 22 42 05 02 05 27 06 05 19 47 00 57 06 25 10.6 3.9 36 0624+1906 SUN OCT 11 18 12 18 50 19 15 23 37 05 02 05 28 06 05 19 50 01 01 06 30 10.6 4.8 44 0721+1841 MON OCT 12 18 11 18 49 19 15 00 33 05 02 05 28 06 06 19 53 01 05 06 34 10.6 5.7 53 0816+1715 TUE OCT 13 18 11 18 48 19 14 01 27 05 03 05 28 06 06 19 56 01 09 06 38 10.7 6.7 62 0909+1459 WED OCT 14 18 10 18 48 19 13 02 19 05 03 05 29 06 06 20 00 01 13 06 43 10.7 7.5 70 0959+1203 THU OCT 15 18 09 18 47 19 12 03 10 05 03 05 29 06 07 20 03 01 17 06 47 10.7 8.4 78 1047+0838 FRI OCT 16 18 08 18 46 19 12 04 00 16 15 05 03 05 29 06 07 20 06 01 21 06 51 10.7 9.2 86 1133+0454 SAT OCT 17 18 08 18 45 19 11 04 49 16 52 05 04 05 29 06 07 20 09 01 25 06 55 10.7 10.1 93 1219+0101 SUN OCT 18 18 07 18 45 19 10 05 37 17 28 05 04 05 30 06 08 20 13 01 29 07 00 10.8 10.8 100 1304-0252 MON OCT 19 18 06 18 44 19 10 06 25 18 05 05 04 05 30 06 08 20 16 01 33 07 04 10.8 10.8 100 1349-0638 TUE OCT 20 18 06 18 43 19 09 07 13 18 42 05 05 05 30 06 08 20 19 01 37 07 08 10.8 10.8 100 1434-1009 WED OCT 21 18 05 18 43 19 08 19 21 05 05 05 31 06 09 20 23 01 41 07 13 10.8 10.2 94 1521-1316 THU OCT 22 18 04 18 42 19 08 20 01 05 05 05 31 06 09 20 26 01 45 07 17 10.8 9.5 87 1609-1551 FRI OCT 23 18 03 18 42 19 07 20 44 05 06 05 31 06 09 20 30 01 49 07 20 10.8 8.8 81 1658-1748 SAT OCT 24 18 03 18 41 19 07 21 30 05 06 05 32 06 10 20 33 01 52 07 25 10.9 8.0 74 1749-1857 SUN OCT 25 18 02 18 40 19 06 22 18 05 06 05 32 06 10 20 36 01 56 07 29 10.9 7.2 66 1840-1914 MON OCT 26 18 02 18 40 19 06 23 10 05 06 05 32 06 10 20 39 02 00 07 33 10.9 6.4 58 1933-1836 TUE OCT 27 18 01 18 39 19 05 00 03 05 07 05 33 06 11 20 42 02 04 07 38 10.9 5.5 50 2027-1700 WED OCT 28 18 00 18 39 19 05 00 59 05 07 05 33 06 11 20 46 02 08 07 42 10.9 4.6 41 2121-1429 THU OCT 29 18 00 18 38 19 04 01 56 05 07 05 33 06 12 20 49 02 12 07 46 10.9 3.6 33 2215-1105 FRI OCT 30 17 59 18 38 19 04 02 55 05 08 05 34 06 12 20 53 02 16 07 51 10.9 2.6 24 2310-0657 SAT OCT 31 17 59 18 37 19 03 03 56 05 08 05 34 06 13 20 56 02 20 07 55 10.9 1.6 14 0005-0217 ONE LINE REFERS TO EVENING DATE FULL MOON OCT 05 20:15 UT AND FOLLOWING MORNING. LAST QUARTER OCT 12 11:12 UT All dates and times are zone HST NEW MOON OCT 20 10:11 UT in upper table (except sid time). FIRST QUARTER OCT 28 11:49 UT