Weekly Information about Bright Comets (2004 July 17: North)

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 Updated on July 17, 2004
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.

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* C/2003 K4 ( LINEAR )
It brigthened rapidly from mid May to mid July and reached to 6.5 mag. It keeps observable until early September in the Northern Hemisphere. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  14 47.02   36 55.1   1.448   1.751    88    6.7     66.3 232.5  20:55 (102, 67)  
July 24  14 20.01   32  1.9   1.497   1.668    80    6.6     60.5 225.6  20:48 ( 96, 57)

* C/2001 Q4 ( NEAT )
It locates visible all night, though it is low in the morning still now. It keeps observable after this in the Northern Hemisphere. It has been fading as expected since mid May, and keeps brighter than 12 mag until October. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  10 54.26   57 36.6   1.847   1.420    49    8.6     15.2  57.7  20:55 (141, 31)  
July 24  11  5.85   58 31.4   1.949   1.503    49    8.9     15.4  60.2  20:48 (143, 30)

* C/2004 H6 ( SWAN )
It began to fade rapidly and become diffused in late June. It locates in the South at midnight until mid August, however, it may fade out very quickly. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   0 21.24  -11 57.4   0.661   1.420   113    9.1    121.2 274.0   3:16 (332, 39)  
July 24  23 17.53  -10 32.5   0.617   1.516   135    9.6    144.8 276.1   3:12 (  0, 44)

* C/2002 T7 ( LINEAR )
It has been fading as exepcted since late May. It keeps observable in the evening sky until August when it becomes 11 mag in the Southern Hemisphere. In the Northern Hemisphere, it will appear at dawn at 13.5 mag in late October. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  10 34.34   -7 16.6   2.186   1.720    50    9.6     13.3  93.8  20:55 ( 84, -5)  
July 24  10 40.38   -7 25.7   2.393   1.823    45   10.0     12.5  97.7  20:48 ( 86, -8)

* C/2003 T3 ( Tabur )
It keeps locating low in the morning sky until August while being fading gradually. It will start to be higher after September, but when it will be fainter than 12 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   6 59.09   56 24.1   2.560   1.842    36   10.7     41.0  95.0   3:16 (209, 14)  
July 24   7 32.14   55 44.8   2.613   1.900    36   10.9     38.8 100.2   3:23 (210, 14)

* 103P/Hartley 2
The condition is worst in this return. It is not observable around the perihelion passage. It will appear at dawn in autumn, when it will already fade to 15 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   7 11.68   15 31.2   2.310   1.321    10   11.6     49.5 101.6   3:16 (237,-17)  
July 24   7 34.43   14 17.4   2.361   1.378    11   11.8     47.1 103.4   3:23 (240,-15)

* 88P/Howell
Fading now. It will be fainter than 13 mag in September. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   2  5.92    8  8.0   1.502   1.701    82   11.7     24.0  70.6   3:16 (290, 39)  
July 24   2 15.99    8 59.7   1.478   1.743    86   11.9     21.1  71.1   3:23 (295, 44)

* 29P/Schwassmann-Wachmann 1
It bursted out in late June and reached to 11.5 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   0 31.37   11 35.0   5.412   5.724   102   13.3      2.8  27.0   3:16 (311, 58)  
July 24   0 31.71   11 50.7   5.308   5.724   109   13.3      2.0   5.0   3:23 (325, 63)

* 78P/Gehrels 2
It will be visible visually soon. It is observable in good condition as bright as 12 mag in autumn. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1 50.53   14 40.2   2.033   2.173    83   14.3     25.5  72.1   3:16 (286, 46)  
July 24   2  2.14   15 32.5   1.941   2.152    87   14.1     24.8  73.2   3:23 (290, 51)

* C/2001 HT50 ( LINEAR-NEAT )
It will fade out gradually, and keeps observable brighter than 17 mag until the end of 2004. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   0 38.09   16 53.8   4.316   4.587    99   15.0     11.1 270.6   3:16 (302, 61)  
July 24   0 32.25   16 51.8   4.240   4.637   106   15.0     12.9 267.0   3:23 (319, 67)

* C/2003 T4 ( LINEAR )
The brightening evolution is slower than usual. It will be October when it becomes visible visually. In the Northern Hemisphere, it keeps observable until 2005 spring when it reaches to 8 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   7 51.85   68 58.4   4.429   3.822    47   15.3     14.9  87.7  20:55 (163, 20)  
July 24   8 11.68   69  1.8   4.329   3.744    49   15.2     15.6  88.0   3:23 (197, 20)

* 43P/Wolf-Harrington
Not observable in this return after this. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   8 53.93    5  2.8   2.864   1.969    22   15.2     36.2 108.8  20:55 (109,-18)  
July 24   9  9.78    3 40.1   2.921   2.007    21   15.4     35.5 109.7  20:48 (109,-20)

* P/2004 F3 ( NEAT )
It is observable at 15-16 mag for a long time until 2005 autumn. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  13 22.48    3  0.9   2.952   3.008    83   15.6     14.8 134.3  20:55 ( 66, 35)  
July 24  13 27.77    1 47.8   3.031   2.997    78   15.7     16.0 131.3  20:48 ( 68, 31)

* 65P/Gunn
It keeps around 16 mag until November. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1 36.91   -0 33.9   3.205   3.404    92   15.7      7.6  82.3   3:16 (305, 38)  
July 24   1 40.06   -0 29.3   3.128   3.425    98   15.7      5.9  87.0   3:23 (313, 43)

* 48P/Johnson
It keeps 16 mag until October. In the Northern Hemisphere, it keeps to be locating only around 30 deg high. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  20  3.90  -20 17.3   1.370   2.385   175   15.8     13.4 223.6   0:25 (  0, 35)  
July 24  19 59.20  -21 25.6   1.359   2.373   176   15.7     13.6 224.1  23:48 (  0, 33)

* C/2004 F4 ( Bradfield )
It is extremely diffused after June. It was reported as bright as 12 mag visually, however, it was reported so faint as 16-18 mag by CCD. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1 16.01   63 41.7   2.094   2.067    74   15.8     15.9 326.7   3:16 (206, 54)  
July 24   1  4.97   65  8.3   2.130   2.179    79   16.2     16.3 314.7   3:23 (198, 57)

* (944) Hidalgo
It is observable at 13.5 mag in good condition in October and November. No observation has been reported since 2003 December. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   2 18.89    3 48.0   2.614   2.654    81   16.1     17.9  46.4   3:16 (292, 34)  
July 24   2 24.71    5 15.8   2.482   2.613    85   15.9     17.4  43.0   3:23 (296, 40)

* 81P/Wild 2
Fading now. It will be fainter than 18 mag in September. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  18 56.85  -20 25.0   1.973   2.976   168   16.4     12.6 259.3  23:13 (  0, 35)  
July 24  18 51.07  -20 40.7   2.038   3.015   160   16.5     10.9 258.7  22:40 (  0, 34)

* 42P/Neujmin 3
It is unexpectedly bright, 16.5 mag. It keeps 16.5 mag until mid August. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  20 10.86  -15 39.1   1.003   2.015   172   16.4      6.2 230.7   0:31 (  0, 39)  
July 24  20  8.43  -16  8.5   1.002   2.016   176   16.4      6.7 228.7   0:02 (  0, 39)

* 53P/Van Biesbroeck
It is observable until November when it becomes fainter than 18 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1  0.90    2 43.7   2.931   3.259    99   16.7      6.6  86.4   3:16 (311, 47)  
July 24   1  3.57    2 43.7   2.869   3.292   105   16.8      4.8  95.1   3:23 (321, 51)

* C/2004 K1 ( Catalina )
New comet. It will be brightening gradually after this, and reach to 15 mag in 2005 spring. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  19 33.89   -2 43.7   3.696   4.670   161   17.0     24.3 269.2  23:50 (  0, 52)  
July 24  19 22.47   -2 47.9   3.668   4.630   158   17.0     24.5 268.0  23:11 (  0, 52)

* P/2004 K2 ( McNaught )
New periodic comet. It keeps 17 mag until September. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1 53.24    8  6.7   1.289   1.578    85   17.0     34.7  80.8   3:16 (293, 41)  
July 24   2  8.97    8 40.2   1.255   1.592    88   17.0     32.6  82.8   3:23 (297, 45)

* 56P/Slaughter-Burnham
Not yet observed in this return. It will be observable at 16 mag in good condition in autumn. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  23 58.20   -1 19.6   2.289   2.879   115   17.2      7.3  49.5   3:16 (335, 51)  
July 24   0  0.33   -0 48.5   2.188   2.855   121   17.0      5.5  40.8   3:23 (347, 54)

* C/2003 G1 ( LINEAR )
It will be fading slowly until November when it becomes fainter than 18 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  18 39.75   44  9.4   5.879   6.344   112   17.2      6.4 277.4  22:56 (180, 81)  
July 24  18 35.74   44 11.4   5.924   6.376   112   17.2      5.9 267.6  22:25 (180, 81)

* C/2002 J5 ( LINEAR )
It keeps brighter than 18 mag until 2005 spring. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  14  1.24   50 58.7   6.287   6.120    75   17.4     10.2 216.7  20:55 (132, 58)  
July 24  13 57.25   50  1.1   6.371   6.137    72   17.4      9.6 210.2  20:48 (129, 54)

* P/2004 HC18 ( LINEAR )
It will be fainter than 18 mag soon. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  15 36.42    8 59.4   1.077   1.732   111   17.4     18.6  94.6  20:55 ( 32, 60)  
July 24  15 45.70    8 42.1   1.137   1.743   107   17.6     21.0  99.3  20:48 ( 36, 59)

* C/2003 O1 ( LINEAR )
It keeps around 18 mag for a long time until 2005 summer. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  16 57.35   45 32.8   6.594   6.894   103   17.5     12.6 247.0  21:14 (180, 80)  
July 24  16 50.03   44 55.0   6.645   6.899   100   17.5     12.0 241.2  20:48 (170, 80)

* 119P/Parker-Hartley
It is observable at 16.5 mag in good condition in autumn. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   1 16.19   13  7.9   3.243   3.435    92   17.6     10.0  63.7   3:16 (296, 52)  
July 24   1 20.17   13 37.0   3.132   3.420    97   17.5      8.5  63.0   3:23 (304, 57)

* C/2003 E1 ( NEAT )
It keeps good condition until September when it becomes fainter than 18 mag 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17  18  7.07    6 46.6   2.622   3.487   142   17.5     12.2 208.0  22:24 (  0, 62)  
July 24  18  4.69    5 28.9   2.676   3.509   139   17.6     12.2 200.9  21:54 (  0, 60)

* C/2003 S4 ( LINEAR )
It reaches to 17.5 mag in October. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 17   2 42.78   26 11.7   4.133   3.882    68   18.0     12.9  92.0   3:16 (264, 41)  
July 24   2 49.23   26  6.4   4.046   3.889    73   17.9     11.9  95.0   3:23 (268, 47)

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