KECK OBSERVATORY CALENDAR FOR 2001  -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
    2001      SET                  RISE   SET                  RISE   TWI    MID   DAWN  LENGTH DARK___ 
                      12     18                   18     12            18            18     h    h    %  midnight
 WED AUG 01  19 10  19 50  20 18  17 17  04 51  04 38  05 06  05 47  16 40  20 22  01 01   8.3  0.0   0 1932-2306
 THU AUG 02  19 09  19 50  20 18  18 06  05 43  04 39  05 07  05 47  16 44  20 26  01 06   8.4  0.0   0 2023-2146
 FRI AUG 03  19 09  19 49  20 17  18 50  06 34  04 39  05 07  05 48  16 47  20 30  01 10   8.4  0.0   0 2113-1928
 SAT AUG 04  19 08  19 48  20 16  19 32  07 24  04 40  05 08  05 48  16 50  20 34  01 15   8.4  0.0   0 2201-1621
 SUN AUG 05  19 07  19 48  20 16  20 10         04 40  05 08  05 48  16 54  20 38  01 19   8.4  0.0   0 2248-1235
 MON AUG 06  19 07  19 47  20 15  20 46         04 41  05 09  05 49  16 56  20 42  01 24   8.4  0.5   6 2332-0820
 TUE AUG 07  19 06  19 46  20 14  21 21         04 41  05 09  05 49  16 59  20 46  01 28   8.4  1.1  13 0017-0345
 WED AUG 08  19 06  19 46  20 14  21 55         04 42  05 09  05 49  17 03  20 50  01 33   8.5  1.7  19 0101+0101
 THU AUG 09  19 05  19 45  20 13  22 29         04 42  05 10  05 50  17 06  20 54  01 37   8.5  2.3  26 0146+0548
 FRI AUG 10  19 04  19 44  20 12  23 05         04 43  05 10  05 50  17 09  20 58  01 42   8.5  2.9  33 0232+1027
 SAT AUG 11  19 04  19 44  20 11  23 45         04 43  05 11  05 50  17 12  21 02  01 46   8.5  3.6  41 0321+1447
 SUN AUG 12  19 03  19 43  20 11  00 28         04 44  05 11  05 51  17 16  21 06  01 51   8.6  4.3  50 0414+1831
 MON AUG 13  19 03  19 42  20 10  01 17         04 44  05 12  05 51  17 19  21 10  01 54   8.6  5.1  59 0510+2125
 TUE AUG 14  19 02  19 41  20 09  02 12         04 44  05 12  05 51  17 22  21 14  01 58   8.6  6.1  70 0610+2308
 WED AUG 15  19 01  19 41  20 08  03 13  16 18  04 45  05 12  05 52  17 25  21 18  02 03   8.6  7.1  82 0713+2323
 THU AUG 16  19 00  19 40  20 07  04 19  17 19  04 45  05 13  05 52  17 28  21 22  02 07   8.6  8.2  94 0817+2201
 FRI AUG 17  19 00  19 39  20 06  05 26  18 17  04 46  05 13  05 52  17 31  21 25  02 12   8.7  8.7 100 0920+1903
 SAT AUG 18  18 59  19 38  20 05  06 34  19 11  04 46  05 13  05 53  17 34  21 29  02 16   8.7  8.7 100 1022+1445
 SUN AUG 19  18 58  19 37  20 05  07 39  19 59  04 47  05 14  05 53  17 38  21 33  02 21   8.7  8.7 100 1120+0930
 MON AUG 20  18 58  19 37  20 04         20 45  04 47  05 14  05 53  17 41  21 37  02 25   8.7  8.0  92 1216+0346
 TUE AUG 21  18 57  19 36  20 03         21 28  04 47  05 14  05 54  17 44  21 41  02 29   8.7  7.3  83 1310-0203
 WED AUG 22  18 56  19 35  20 02         22 10  04 48  05 15  05 54  17 47  21 45  02 34   8.8  6.6  75 1402-0737
 THU AUG 23  18 55  19 34  20 01         22 52  04 48  05 15  05 54  17 49  21 49  02 38   8.8  5.9  67 1455-1237
 FRI AUG 24  18 54  19 33  20 00         23 35  04 49  05 15  05 54  17 52  21 53  02 43   8.8  5.2  59 1547-1651
 SAT AUG 25  18 54  19 32  19 59         00 20  04 49  05 16  05 55  17 55  21 57  02 47   8.8  4.5  50 1640-2007
 SUN AUG 26  18 53  19 32  19 58         01 07  04 49  05 16  05 55  17 58  22 01  02 51   8.8  3.7  41 1733-2220
 MON AUG 27  18 52  19 31  19 57         01 56  04 50  05 16  05 55  18 01  22 05  02 56   8.9  2.9  32 1826-2326
 TUE AUG 28  18 51  19 30  19 56         02 47  04 50  05 17  05 55  18 04  22 09  03 00   8.9  2.1  23 1919-2323
 WED AUG 29  18 50  19 29  19 55  16 03  03 38  04 51  05 17  05 56  18 07  22 13  03 05   8.9  1.2  13 2011-2216
 THU AUG 30  18 49  19 28  19 54  16 49  04 30  04 51  05 17  05 56  18 10  22 17  03 09   9.0  0.3   3 2101-2010
 FRI AUG 31  18 49  19 27  19 53  17 31  05 21  04 51  05 18  05 56  18 13  22 21  03 12   9.0  0.0   0 2149-1712

                ONE LINE REFERS TO EVENING DATE    FULL MOON      AUG 04   05:57  UT
                AND FOLLOWING MORNING.             LAST QUARTER   AUG 12   07:56  UT
                All dates and times are zone HST   NEW MOON       AUG 19   02:57  UT
                in upper table (except sid time).  FIRST QUARTER  AUG 25   19:56  UT