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
 SAT AUG 01  19 10  19 50  20 18         01 30  04 38  05 06  05 47  16 11  20 21  01 28   9.3  3.6  38 1604-1527
 SUN AUG 02  19 09  19 50  20 18         02 15  04 39  05 07  05 47  16 15  20 25  01 33   9.3  2.9  30 1655-1727
 MON AUG 03  19 09  19 49  20 17         03 03  04 39  05 07  05 48  16 18  20 29  01 37   9.3  2.1  22 1748-1840
 TUE AUG 04  19 08  19 48  20 16  16 07  03 56  04 40  05 08  05 48  16 20  20 33  01 42   9.3  1.2  12 1842-1856
 WED AUG 05  19 07  19 48  20 16  17 00  04 51  04 40  05 08  05 48  16 24  20 37  01 46   9.3  0.3   3 1939-1811
 THU AUG 06  19 07  19 47  20 15  17 53  05 50  04 41  05 09  05 49  16 27  20 41  01 51   9.4  0.0   0 2035-1622
 FRI AUG 07  19 06  19 46  20 14  18 44  06 49  04 41  05 09  05 49  16 30  20 45  01 55   9.4  0.0   0 2132-1333
 SAT AUG 08  19 06  19 46  20 14  19 33  07 49  04 42  05 09  05 49  16 34  20 49  01 59   9.4  0.0   0 2229-0953
 SUN AUG 09  19 05  19 45  20 13  20 20         04 42  05 10  05 50  16 37  20 53  02 04   9.4  0.6   6 2324-0536
 MON AUG 10  19 04  19 44  20 12  21 06         04 43  05 10  05 50  16 40  20 57  02 08   9.4  1.4  14 0019-0058
 TUE AUG 11  19 04  19 44  20 11  21 52         04 43  05 11  05 50  16 44  21 01  02 13   9.4  2.1  22 0114+0341
 WED AUG 12  19 03  19 43  20 11  22 37         04 44  05 11  05 51  16 47  21 05  02 17   9.5  2.9  30 0209+0807
 THU AUG 13  19 03  19 42  20 10  23 24         04 44  05 12  05 51  16 50  21 09  02 21   9.5  3.7  38 0304+1203
 FRI AUG 14  19 02  19 41  20 09  00 13         04 44  05 12  05 51  16 53  21 13  02 25   9.5  4.5  47 0401+1515
 SAT AUG 15  19 01  19 41  20 08  01 04         04 45  05 12  05 52  16 57  21 17  02 29   9.5  5.4  56 0458+1731
 SUN AUG 16  19 00  19 40  20 07  01 57         04 45  05 13  05 52  17 00  21 20  02 34   9.6  6.3  65 0555+1844
 MON AUG 17  19 00  19 39  20 06  02 52         04 46  05 13  05 52  17 03  21 24  02 38   9.6  7.2  75 0652+1853
 TUE AUG 18  18 59  19 38  20 05  03 47  16 37  04 46  05 13  05 53  17 06  21 28  02 42   9.6  8.2  85 0748+1758
 WED AUG 19  18 58  19 37  20 05  04 42  17 27  04 47  05 14  05 53  17 09  21 32  02 47   9.6  9.1  94 0842+1606
 THU AUG 20  18 58  19 37  20 04  05 36  18 14  04 47  05 14  05 53  17 12  21 36  02 51   9.6  9.6 100 0933+1328
 FRI AUG 21  18 57  19 36  20 03  06 28  18 57  04 47  05 14  05 54  17 15  21 40  02 55   9.6  9.6 100 1023+1015
 SAT AUG 22  18 56  19 35  20 02  07 19  19 37  04 48  05 15  05 54  17 18  21 44  03 00   9.7  9.6  99 1111+0638
 SUN AUG 23  18 55  19 34  20 01         20 15  04 48  05 15  05 54  17 21  21 48  03 04   9.7  9.0  92 1158+0248
 MON AUG 24  18 54  19 33  20 00         20 52  04 49  05 15  05 54  17 24  21 52  03 08   9.7  8.4  86 1243-0104
 TUE AUG 25  18 54  19 32  19 59         21 29  04 49  05 16  05 55  17 27  21 56  03 13   9.7  7.8  79 1328-0453
 WED AUG 26  18 53  19 32  19 58         22 06  04 49  05 16  05 55  17 31  22 00  03 17   9.7  7.2  73 1414-0829
 THU AUG 27  18 52  19 31  19 57         22 44  04 50  05 16  05 55  17 34  22 04  03 21   9.8  6.5  67 1500-1146
 FRI AUG 28  18 51  19 30  19 56         23 24  04 50  05 17  05 55  17 37  22 08  03 26   9.8  5.9  60 1547-1435
 SAT AUG 29  18 50  19 29  19 55         00 07  04 51  05 17  05 56  17 40  22 12  03 30   9.8  5.2  52 1637-1648
 SUN AUG 30  18 49  19 28  19 54         00 53  04 51  05 17  05 56  17 43  22 16  03 34   9.8  4.4  44 1728-1817
 MON AUG 31  18 49  19 27  19 53         01 43  04 51  05 18  05 56  17 46  22 20  03 38   9.8  3.6  36 1821-1856

                ONE LINE REFERS TO EVENING DATE    FULL MOON      AUG 08   02:11  UT
                AND FOLLOWING MORNING.             LAST QUARTER   AUG 14   19:52  UT
                All dates and times are zone HST   NEW MOON       AUG 22   02:03  UT
                in upper table (except sid time).  FIRST QUARTER  AUG 30   05:09  UT