KECK OBSERVATORY CALENDAR FOR 2004  -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
    2004      SET                  RISE   SET                  RISE   TWI    MID   DAWN  LENGTH DARK___ 
                      12     18                   18     12            18            18     h    h    %  midnight
 SUN AUG 01  19 09  19 50  20 18  20 09         04 39  05 07  05 47  16 41  20 23  01 03   8.4  0.0   0 2231-1359
 MON AUG 02  19 09  19 49  20 17  20 51         04 39  05 07  05 48  16 44  20 27  01 07   8.4  0.6   6 2323-0755
 TUE AUG 03  19 08  19 48  20 16  21 28         04 40  05 08  05 48  16 47  20 31  01 12   8.4  1.2  14 0012-0140
 WED AUG 04  19 07  19 48  20 16  22 03         04 40  05 08  05 48  16 51  20 35  01 16   8.4  1.8  21 0059+0427
 THU AUG 05  19 07  19 47  20 15  22 37         04 41  05 09  05 49  16 54  20 39  01 21   8.4  2.4  28 0145+1012
 FRI AUG 06  19 06  19 46  20 14  23 12         04 41  05 09  05 49  16 57  20 43  01 25   8.4  3.0  35 0232+1524
 SAT AUG 07  19 06  19 46  20 14  23 49         04 42  05 09  05 49  17 01  20 47  01 30   8.5  3.6  42 0319+1952
 SUN AUG 08  19 05  19 45  20 13  00 29         04 42  05 10  05 50  17 03  20 51  01 34   8.5  4.3  50 0408+2328
 MON AUG 09  19 04  19 44  20 12  01 12         04 43  05 10  05 50  17 06  20 55  01 39   8.5  5.0  58 0459+2602
 TUE AUG 10  19 04  19 44  20 11  01 59         04 43  05 11  05 50  17 09  20 59  01 43   8.5  5.8  67 0552+2726
 WED AUG 11  19 03  19 43  20 11  02 51  16 18  04 44  05 11  05 51  17 13  21 03  01 48   8.6  6.7  77 0646+2734
 THU AUG 12  19 03  19 42  20 10  03 44  17 08  04 44  05 12  05 51  17 16  21 07  01 52   8.6  7.6  88 0739+2626
 FRI AUG 13  19 02  19 41  20 09  04 39  17 54  04 44  05 12  05 51  17 19  21 11  01 56   8.6  8.5  99 0831+2403
 SAT AUG 14  19 01  19 41  20 08  05 34  18 37  04 45  05 12  05 52  17 22  21 15  02 00   8.6  8.6 100 0922+2033
 SUN AUG 15  19 00  19 40  20 07  06 29  19 16  04 45  05 13  05 52  17 25  21 19  02 04   8.6  8.6 100 1011+1606
 MON AUG 16  19 00  19 39  20 06  07 22  19 53  04 46  05 13  05 52  17 28  21 23  02 09   8.7  8.7 100 1058+1053
 TUE AUG 17  18 59  19 38  20 05         20 28  04 46  05 13  05 53  17 31  21 27  02 13   8.7  8.3  95 1144+0509
 WED AUG 18  18 58  19 37  20 05         21 02  04 47  05 14  05 53  17 35  21 30  02 18   8.7  7.8  89 1231-0053
 THU AUG 19  18 58  19 37  20 04         21 37  04 47  05 14  05 53  17 38  21 34  02 22   8.7  7.2  82 1318-0659
 FRI AUG 20  18 57  19 36  20 03         22 14  04 47  05 14  05 54  17 41  21 38  02 26   8.7  6.5  74 1407-1253
 SAT AUG 21  18 56  19 35  20 02         22 55  04 48  05 15  05 54  17 44  21 42  02 31   8.8  5.9  67 1459-1816
 SUN AUG 22  18 55  19 34  20 01         23 41  04 48  05 15  05 54  17 47  21 46  02 35   8.8  5.1  58 1556-2247
 MON AUG 23  18 54  19 33  20 00         00 33  04 49  05 15  05 54  17 50  21 50  02 40   8.8  4.3  48 1656-2602
 TUE AUG 24  18 54  19 32  19 59         01 32  04 49  05 16  05 55  17 52  21 54  02 44   8.8  3.3  37 1800-2738
 WED AUG 25  18 53  19 32  19 58         02 37  04 49  05 16  05 55  17 55  21 58  02 48   8.8  2.2  24 1906-2722
 THU AUG 26  18 52  19 31  19 57  16 15  03 44  04 50  05 16  05 55  17 58  22 02  02 53   8.9  1.1  12 2010-2513
 FRI AUG 27  18 51  19 30  19 56  17 10  04 51  04 50  05 17  05 55  18 01  22 06  02 57   8.9  0.0   0 2111-2125
 SAT AUG 28  18 50  19 29  19 55  17 59  05 55  04 51  05 17  05 56  18 04  22 10  03 02   8.9  0.0   0 2209-1620
 SUN AUG 29  18 49  19 28  19 54  18 43  06 55  04 51  05 17  05 56  18 07  22 14  03 06   9.0  0.0   0 2302-1025
 MON AUG 30  18 49  19 27  19 53  19 22  07 52  04 51  05 18  05 56  18 10  22 18  03 10   9.0  0.0   0 2352-0407
 TUE AUG 31  18 48  19 26  19 52  19 58         04 52  05 18  05 56  18 13  22 22  03 15   9.0  0.1   1 0040+0212

                ONE LINE REFERS TO EVENING DATE    LAST QUARTER   AUG 07   22:05  UT
                AND FOLLOWING MORNING.             NEW MOON       AUG 16   01:28  UT
                All dates and times are zone HST   FIRST QUARTER  AUG 23   10:14  UT
                in upper table (except sid time).  FULL MOON      AUG 30   02:26  UT