Weekly Information about Bright Comets (2003 July 12: North)

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Updated on July 14, 2003
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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/2002 Y1 ( Juels-Holvorcem )


In the Northern Hemisphere, it will never be observable again. It is fading slowly and still keeps brighter than 9 mag in late June.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   3 25.63  -43 27.9   1.529   1.763    85    9.4     58.2 152.8   3:11 (314,-13)  
July 19   3 43.24  -49 22.4   1.573   1.861    89    9.6     55.5 153.3   3:17 (321,-15)  

* C/2002 V1 ( NEAT )


In the Northern Hemisphere, it will never be observable again. It was 10 mag still in early May, but very diffused. No observations have been reported since that, so recent brightness is uncertain.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   5  4.68  -16 44.8   3.443   2.921    51   11.6     12.3 113.6   3:11 (279,-17)  
July 19   5  9.89  -17 22.4   3.482   3.018    55   11.7     11.6 120.1   3:17 (283,-11)  

* C/2001 HT50 ( LINEAR-NEAT )


It will be observable in good condition at 11-12 mag in autumn again.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   5 40.91   16  8.2   3.682   2.792    24   12.1      2.5  28.6   3:11 (246, -5)  
July 19   5 41.32   16 23.3   3.614   2.794    31   12.1      2.1  12.0   3:17 (251,  2)  

* C/2002 O7 ( LINEAR )


Getting brighter slowly. It will be 10 mag in autumn. In the Northern Hemisphere, it will be unobservable soon.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  11  2.43   12 41.0   1.914   1.533    52   12.3     30.8 193.6  20:59 ( 94, 16)  
July 19  10 59.47    9 11.9   1.939   1.445    46   12.1     30.3 190.1  20:54 ( 95,  9)  

* 65P/Gunn


It is observable at 12.5 mag for long time until August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  18 35.15  -32 59.9   1.480   2.475   164   12.4     10.3 248.1  23:14 (  0, 22)  
July 19  18 30.21  -33 23.0   1.510   2.482   158   12.4      8.6 250.9  22:42 (  0, 22)  

* C/2001 Q4 ( NEAT )


It will reach to 1 mag in 2004 spring. In the Northern Hemisphere, it is not observable until that time. It is getting brighter as expected until late June.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   3 44.14  -37 21.7   4.355   4.273    78   13.0     15.6 132.3   3:11 (307,-13)  
July 19   3 50.89  -38 40.0   4.219   4.200    82   12.9     16.4 136.8   3:17 (311, -9)  

* 29P/Schwassmann-Wachmann 1


It was in outburst and had a large coma in late June.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  22 50.64   -3  2.6   5.089   5.750   126   13.2      2.4 282.2   3:11 (351, 52)  
July 19  22 49.32   -3  0.7   5.005   5.749   133   13.2      3.3 271.0   3:05 (  0, 52)  

* 81P/Wild 2


It will appear at dawn again in 2004 January at 14 mag, then fade out gradually.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   8 30.93   18 52.2   2.711   1.757    16   13.6     38.9 102.4  20:59 (121, -9)  
July 19   8 49.78   17 49.1   2.698   1.730    14   13.5     39.8 103.9  20:54 (121,-11)  

* 116P/Wild 4


It became about 1.5 or 2 mag brighter than expected after the perihelion passage in January. However, it has already started fading out.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  15  7.51  -21 32.3   1.790   2.473   121   13.7      6.9 102.0  20:59 ( 19, 31)  
July 19  15 11.47  -21 44.2   1.885   2.495   115   13.8      9.2 102.2  20:54 ( 24, 29)  

* C/2001 RX14 ( LINEAR )


Getting lower rapidly while getting fainter. It will be unobservable in August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  11 55.41   -2 44.7   3.054   2.885    70   13.8     21.1 130.7  20:59 ( 73, 18)  
July 19  12  2.98   -4 19.3   3.191   2.939    66   14.0     21.1 129.2  20:54 ( 74, 14)  

* C/2002 T7 ( LINEAR )


It is expected to be 1 mag in the southern sky in 2004 spring. It is appearing at dawn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   5 15.55   29  8.3   5.105   4.250    29   14.3      8.1  75.6   3:11 (240,  8)  
July 19   5 19.68   29 22.7   4.962   4.173    35   14.2      7.9  74.3   3:17 (243, 13)  

* 53P/Van Biesbroeck


It was reported brighter than 14 mag visually these days.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  15 42.50  -10 27.1   1.788   2.523   126   14.3      4.7 149.7  20:59 ( 12, 44)  
July 19  15 44.25  -10 58.1   1.839   2.508   120   14.3      6.9 133.8  20:54 ( 19, 42)  

* C/2002 J4 ( NEAT )


It will be observable at 14.5 mag for a long time until autumn in the Southern Hemisphere.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  17 58.24  -54 59.6   2.850   3.716   143   14.5     12.7 196.3  22:38 (  0,  0)  
July 19  17 54.27  -56  8.6   2.875   3.700   138   14.5      9.6 216.0  22:06 (  0, -1)  

* C/2001 K5 ( LINEAR )


It is observable in good condition at 14-15 mag until autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  18 31.65   56 21.0   5.294   5.575   100   14.6      6.7 288.4  23:11 (180, 69)  
July 19  18 26.41   56 31.0   5.320   5.594   100   14.6      6.0 277.3  22:38 (180, 68)  

* 118P/Sheomaker-Levy 4


It will appear at dawn in September at 15 mag, then fade out gradually.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   6 33.94   18 17.0   2.994   2.011    12   14.6     35.5  91.6   3:11 (236,-13)  
July 19   6 51.36   18  6.3   2.979   2.011    14   14.6     35.5  93.2   3:17 (239,-10)  

* C/2003 H1 ( LINEAR )


It will be as bright as 11.5 mag in 2004 spring.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  15 39.97   20 39.1   2.848   3.346   110   14.8     28.8 246.3  20:59 ( 34, 73)  
July 19  15 27.61   19 13.2   2.897   3.293   103   14.8     26.7 241.4  20:54 ( 51, 67)  

* C/2002 X1 ( LINEAR )


It will appear at dawn again in late July, then it will keep 14-15 mag until the end of 2003.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   5 40.60   18  6.1   3.377   2.487    24   15.3      4.8 168.3   3:11 (245, -4)  
July 19   5 40.88   17 31.8   3.303   2.488    30   15.3      5.1 178.5   3:17 (250,  2)  

* C/2003 H3 ( NEAT )


It will be fading gradually until December when it becomes fainter than 18 mag and gets low in the evening.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  19 17.00    5 45.5   2.071   3.008   152   15.4     17.4 315.1   0:01 (  0, 61)  
July 19  19 11.35    7  5.4   2.103   3.027   150   15.4     15.7 311.9  23:23 (  0, 62)  

* 66P/du Toit


It will be unobservable soon in the Northern Hemisphere. In the Southern Hemisphere, it will be observable at 15 mag in good condition until September.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  12 19.99  -17 35.0   1.130   1.420    82   15.6     31.4 134.4  20:59 ( 57, 13)  
July 19  12 31.97  -20 12.9   1.131   1.382    79   15.4     34.9 131.6  20:54 ( 57,  9)  

* C/2003 G1 ( LINEAR )


It will be observable in good condition at 16 mag until autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  16 57.56   11 24.7   4.341   5.067   131   15.7      7.8 300.6  21:37 (  0, 66)  
July 19  16 54.63   11 49.2   4.421   5.080   125   15.8      6.3 298.7  21:07 (  0, 67)  

* 22P/Kopff


Appearing at dawn. No observations have been reported since 2002 September.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   2 30.40   10 16.6   2.642   2.498    70   15.8     17.3  76.6   3:11 (279, 30)  
July 19   2 37.99   10 41.8   2.597   2.540    75   15.9     15.5  78.0   3:17 (283, 35)  

* C/2002 R3 ( LONEOS )


It will be observable at around 16 mag in good condition.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   0 54.92   21 58.7   3.777   3.878    88   16.0     12.3 281.8   3:11 (282, 55)  
July 19   0 48.21   22 13.7   3.646   3.882    95   15.9     14.8 276.9   3:17 (292, 64)  

* C/2003 K4 ( LINEAR )


It will be 7 mag in the southern sky from autumn to winter in 2004.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  20 44.36   32 30.3   5.101   5.707   122   16.1     13.1 279.6   1:28 (  0, 88)  
July 19  20 36.93   32 41.2   4.994   5.642   125   16.0     13.9 274.0   0:53 (  0, 88)  

* C/2000 SV74 ( LINEAR )


Although it has been bright and observable for a long time, it will be fainter than 17 mag and getting lower in the evening sky in August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  13  1.01   28 39.3   5.401   5.231    74   16.6     12.2 175.6  20:59 ( 96, 48)  
July 19  13  1.78   27 15.3   5.535   5.274    69   16.7     12.0 170.5  20:54 ( 96, 43)  

* C/1999 U4 ( Catalina-Skiff )


It keeps 17 mag until 2004 spring.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  12 36.30   27 24.0   7.070   6.792    70   16.7      8.9 159.7  20:59 ( 97, 42)  
July 19  12 38.10   26 26.1   7.194   6.827    64   16.7      9.1 155.3  20:54 ( 98, 38)  

* C/2002 J5 ( LINEAR )


It keeps 17 mag until 2004 summer.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  17 27.39   40 24.4   5.290   5.748   111   16.7     15.2 268.5  22:06 (180, 85)  
July 19  17 18.36   40 16.5   5.330   5.744   109   16.7     14.4 262.9  21:30 (180, 85)  

* C/2003 F1 ( LINEAR )


It will keep 17.5 mag until summer.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  15 45.51   40 31.8   3.713   4.009    99   16.9     19.4 194.8  20:59 (131, 81)  
July 19  15 43.02   38 18.0   3.759   4.011    96   16.9     19.7 189.6  20:54 (109, 78)  

* 2002 CE10


Keeps good condition until autumn. It will reach to 15.7 mag in September.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12   1 44.97   35 34.0   2.108   2.058    73   17.3     15.2 261.9   3:11 (254, 50)  
July 19   1 34.90   35 13.2   1.960   2.067    81   17.2     20.7 259.2   3:17 (258, 59)  

* 95P/(2060) Chiron


It will be observable around 17.5 mag until autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  19  1.59  -15 18.7  11.215  12.221   171   17.4      3.7 263.7  23:41 (  0, 40)  
July 19  18 59.84  -15 21.8  11.244  12.235   166   17.4      3.6 262.6  23:12 (  0, 40)  

* 43P/Wolf-Harrington


It will reach to 13 mag in the evening sky from winter to spring in 2004.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  23 33.08   21 29.0   2.276   2.724   105   18.0     12.5  25.9   3:11 (309, 70)  
July 19  23 35.39   22 46.6   2.158   2.683   110   17.7     11.5  18.5   3:17 (327, 76)  

* C/2003 L2 ( LINEAR )


New comet. It will be observable around 17 mag from autumn to winter in the northern sky.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 12  18 30.30   64 40.4   3.247   3.447    92   17.9     19.5 300.7  23:08 (180, 60)  
July 19  18 11.45   65 38.5   3.232   3.410    91   17.9     18.3 291.9  22:22 (180, 59)  

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