KECK OBSERVATORY CALENDAR FOR 1998 -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 1998 SET RISE SET RISE TWI MID DAWN LENGTH DARK___ 12 18 18 12 18 18 h h % midnight THU OCT 01 18 21 18 58 19 24 03 13 05 00 05 25 06 03 19 45 00 22 05 23 9.6 1.8 18 2141-1305 FRI OCT 02 18 20 18 57 19 23 04 13 05 00 05 25 06 03 19 48 00 26 05 27 9.6 0.8 8 2237-0917 SAT OCT 03 18 19 18 56 19 22 16 45 05 15 05 00 05 26 06 03 19 51 00 30 05 31 9.6 0.0 0 2334-0449 SUN OCT 04 18 18 18 56 19 21 17 32 06 18 05 00 05 26 06 04 19 54 00 34 05 34 9.6 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 57 00 38 05 39 9.7 0.0 0 0128+0458 TUE OCT 06 18 16 18 54 19 19 19 09 05 01 05 26 06 04 20 00 00 42 05 43 9.7 0.0 0 0227+0934 WED OCT 07 18 16 18 53 19 19 19 59 05 01 05 27 06 04 20 04 00 45 05 47 9.7 0.7 6 0326+1331 THU OCT 08 18 15 18 52 19 18 20 52 05 01 05 27 06 05 20 07 00 49 05 51 9.7 1.6 16 0426+1631 FRI OCT 09 18 14 18 51 19 17 21 46 05 02 05 27 06 05 20 10 00 53 05 56 9.8 2.5 25 0525+1824 SAT OCT 10 18 13 18 51 19 16 22 42 05 02 05 27 06 05 20 13 00 57 06 00 9.8 3.4 35 0624+1906 SUN OCT 11 18 12 18 50 19 15 23 37 05 02 05 28 06 05 20 15 01 01 06 04 9.8 4.4 44 0721+1841 MON OCT 12 18 11 18 49 19 15 00 33 05 02 05 28 06 06 20 19 01 05 06 08 9.8 5.3 54 0816+1715 TUE OCT 13 18 11 18 48 19 14 01 27 05 03 05 28 06 06 20 22 01 09 06 13 9.8 6.2 63 0909+1459 WED OCT 14 18 10 18 48 19 13 02 19 05 03 05 29 06 06 20 25 01 13 06 17 9.8 7.1 72 0959+1203 THU OCT 15 18 09 18 47 19 12 03 10 05 03 05 29 06 07 20 28 01 17 06 21 9.8 8.0 80 1047+0838 FRI OCT 16 18 08 18 46 19 12 04 00 16 15 05 03 05 29 06 07 20 32 01 21 06 25 9.8 8.8 89 1133+0454 SAT OCT 17 18 08 18 45 19 11 04 49 16 52 05 04 05 29 06 07 20 35 01 25 06 30 9.9 9.6 97 1219+0101 SUN OCT 18 18 07 18 45 19 10 05 37 17 28 05 04 05 30 06 08 20 38 01 29 06 34 9.9 9.9 100 1304-0252 MON OCT 19 18 06 18 44 19 10 06 25 18 05 05 04 05 30 06 08 20 42 01 33 06 38 9.9 9.9 100 1349-0638 TUE OCT 20 18 06 18 43 19 09 07 13 18 42 05 05 05 30 06 08 20 45 01 37 06 43 9.9 9.9 100 1434-1009 WED OCT 21 18 05 18 43 19 08 19 21 05 05 05 31 06 09 20 48 01 41 06 46 10.0 9.7 97 1521-1316 THU OCT 22 18 04 18 42 19 08 20 01 05 05 05 31 06 09 20 52 01 45 06 50 10.0 9.1 91 1609-1551 FRI OCT 23 18 03 18 42 19 07 20 44 05 06 05 31 06 09 20 55 01 49 06 55 10.0 8.4 83 1658-1748 SAT OCT 24 18 03 18 41 19 07 21 30 05 06 05 32 06 10 20 59 01 52 06 59 10.0 7.6 76 1749-1857 SUN OCT 25 18 02 18 40 19 06 22 18 05 06 05 32 06 10 21 02 01 56 07 03 10.0 6.8 68 1840-1914 MON OCT 26 18 02 18 40 19 06 23 10 05 06 05 32 06 10 21 06 02 00 07 07 10.0 5.9 59 1933-1836 TUE OCT 27 18 01 18 39 19 05 00 03 05 07 05 33 06 11 21 09 02 04 07 12 10.0 5.1 50 2027-1700 WED OCT 28 18 00 18 39 19 05 00 59 05 07 05 33 06 11 21 12 02 08 07 16 10.0 4.1 41 2121-1429 THU OCT 29 18 00 18 38 19 04 01 56 05 07 05 33 06 12 21 15 02 12 07 20 10.0 3.2 31 2215-1105 FRI OCT 30 17 59 18 38 19 04 02 55 05 08 05 34 06 12 21 19 02 16 07 25 10.1 2.2 22 2310-0657 SAT OCT 31 17 59 18 37 19 03 03 56 05 08 05 34 06 13 21 22 02 20 07 29 10.1 1.2 11 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