KECK OBSERVATORY CALENDAR FOR 1999  -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
    1999      SET                  RISE   SET                  RISE   TWI    MID   DAWN  LENGTH DARK___ 
                      12     18                   18     12            18            18     h    h    %  midnight
 SUN AUG 01  19 10  19 50  20 18  22 11         04 38  05 06  05 47  16 38  20 20  00 59   8.3  1.9  22 0047+0011
 MON AUG 02  19 09  19 50  20 18  22 53         04 39  05 07  05 47  16 42  20 24  01 04   8.4  2.6  30 0138+0453
 TUE AUG 03  19 09  19 49  20 17  23 37         04 39  05 07  05 48  16 45  20 28  01 08   8.4  3.3  39 0232+0924
 WED AUG 04  19 08  19 48  20 16  00 23         04 40  05 08  05 48  16 48  20 32  01 13   8.4  4.1  49 0327+1327
 THU AUG 05  19 07  19 48  20 16  01 13         04 40  05 08  05 48  16 52  20 36  01 17   8.4  5.0  58 0424+1645
 FRI AUG 06  19 07  19 47  20 15  02 06         04 41  05 09  05 49  16 54  20 40  01 22   8.4  5.8  69 0524+1903
 SAT AUG 07  19 06  19 46  20 14  03 04         04 41  05 09  05 49  16 57  20 44  01 26   8.4  6.8  80 0625+2007
 SUN AUG 08  19 06  19 46  20 14  04 05  16 58  04 42  05 09  05 49  17 01  20 48  01 31   8.5  7.8  92 0727+1952
 MON AUG 09  19 05  19 45  20 13  05 06  17 56  04 42  05 10  05 50  17 04  20 52  01 35   8.5  8.5 100 0827+1819
 TUE AUG 10  19 04  19 44  20 12  06 07  18 49  04 43  05 10  05 50  17 07  20 56  01 40   8.5  8.5 100 0925+1541
 WED AUG 11  19 04  19 44  20 11  07 06  19 37  04 43  05 11  05 50  17 10  21 00  01 44   8.5  8.5 100 1021+1211
 THU AUG 12  19 03  19 43  20 11         20 22  04 44  05 11  05 51  17 14  21 04  01 48   8.6  8.4  97 1113+0808
 FRI AUG 13  19 03  19 42  20 10         21 03  04 44  05 12  05 51  17 17  21 08  01 52   8.6  7.7  89 1203+0348
 SAT AUG 14  19 02  19 41  20 09         21 42  04 44  05 12  05 51  17 20  21 12  01 56   8.6  7.0  81 1251-0035
 SUN AUG 15  19 01  19 41  20 08         22 20  04 45  05 12  05 52  17 23  21 16  02 01   8.6  6.4  74 1338-0450
 MON AUG 16  19 00  19 40  20 07         22 58  04 45  05 13  05 52  17 26  21 19  02 05   8.6  5.8  66 1424-0849
 TUE AUG 17  19 00  19 39  20 06         23 36  04 46  05 13  05 52  17 29  21 23  02 10   8.7  5.2  59 1511-1222
 WED AUG 18  18 59  19 38  20 05         00 16  04 46  05 13  05 53  17 32  21 27  02 14   8.7  4.5  51 1558-1524
 THU AUG 19  18 58  19 37  20 05         00 58  04 47  05 14  05 53  17 36  21 31  02 19   8.7  3.8  43 1646-1746
 FRI AUG 20  18 58  19 37  20 04         01 42  04 47  05 14  05 53  17 39  21 35  02 23   8.7  3.1  35 1736-1923
 SAT AUG 21  18 57  19 36  20 03         02 30  04 47  05 14  05 54  17 42  21 39  02 27   8.7  2.3  26 1827-2009
 SUN AUG 22  18 56  19 35  20 02         03 20  04 48  05 15  05 54  17 44  21 43  02 32   8.8  1.5  16 1919-1959
 MON AUG 23  18 55  19 34  20 01  16 25  04 12  04 48  05 15  05 54  17 47  21 47  02 36   8.8  0.6   6 2012-1850
 TUE AUG 24  18 54  19 33  20 00  17 13  05 06  04 49  05 15  05 54  17 50  21 51  02 41   8.8  0.0   0 2105-1645
 WED AUG 25  18 54  19 32  19 59  17 59  06 02  04 49  05 16  05 55  17 53  21 55  02 45   8.8  0.0   0 2157-1345
 THU AUG 26  18 53  19 32  19 58  18 44  06 57  04 49  05 16  05 55  17 56  21 59  02 49   8.8  0.0   0 2250-1000
 FRI AUG 27  18 52  19 31  19 57  19 27  07 54  04 50  05 16  05 55  17 59  22 03  02 54   8.9  0.0   0 2341-0540
 SAT AUG 28  18 51  19 30  19 56  20 09         04 50  05 17  05 55  18 02  22 07  02 58   8.9  0.2   2 0033-0058
 SUN AUG 29  18 50  19 29  19 55  20 52         04 51  05 17  05 56  18 05  22 11  03 03   8.9  1.0  10 0126+0349
 MON AUG 30  18 49  19 28  19 54  21 36         04 51  05 17  05 56  18 08  22 15  03 06   9.0  1.7  18 0219+0827
 TUE AUG 31  18 49  19 27  19 53  22 21         04 51  05 18  05 56  18 11  22 19  03 10   9.0  2.5  27 0314+1239

                ONE LINE REFERS TO EVENING DATE    LAST QUARTER   AUG 04   17:29  UT
                AND FOLLOWING MORNING.             NEW MOON       AUG 11   11:11  UT
                All dates and times are zone HST   FIRST QUARTER  AUG 19   01:51  UT
                in upper table (except sid time).  FULL MOON      AUG 26   23:49  UT