Weekly Information about Bright Comets (2004 Apr. 3: North)

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Updated on April 4, 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/2002 T7 ( LINEAR )


The brightness evolution had been slower than expected from January to February. Not it is not observable. In the Southern Hemisphere, it appears at dawn in mid April at 3.5 mag, then it locates in good position at 1 mag in May.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  23 55.73    8 25.4   1.684   0.752    13    4.7     11.6 209.4   4:18 (256, -6)  
Apr. 10  23 53.29    7  7.0   1.520   0.677    20    4.1     13.2 199.2   4:07 (259, -3)  

* C/2001 Q4 ( NEAT )


It will be 2 mag in May. In the Southern Hemisphere, it keeps observable in the south-western sky at dusk. In the Northern Hemisphere, it is not observable until May.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   1  6.72  -65 54.1   1.077   1.212    71    5.5     30.4  95.0  19:48 ( 30,-40)  
Apr. 10   1 49.14  -66  2.7   0.889   1.145    74    4.8     45.1  89.6  19:56 ( 30,-40)  

* C/2003 T3 ( Tabur )


Not obesrvable. In the Northern Hemisphere, it will appear at dawn at 9.5 mag in May. Because brightness evolution before the perihelion passage was very slow, it can be fainter than this ephemeris. Then it keeps low until autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   0  8.69   13  4.8   2.485   1.526    12    9.7     46.6  41.6   4:18 (250, -5)  
Apr. 10   0 23.96   17 12.0   2.446   1.505    15    9.6     48.1  41.9   4:07 (247, -3)  

* 88P/Howell


Although it was so faint as 14.6 mag in late February, it brightened rapidly in late March. Now it is 13.3 mag by CCD, or 11 mag visually. It is observable in good condition in the Southern Hemisphere. But in the Northern Hemisphere, it keeps locating lower than 15 deg until June.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  21 36.11  -17  2.9   1.721   1.372    52   10.9     52.1  73.6   4:18 (297,  7)  
Apr. 10  22  0.13  -15 15.3   1.698   1.368    53   10.8     51.4  72.1   4:07 (294,  7)  

* 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)  
Apr.  3  23 58.16    5 57.3   2.163   1.209    12   12.3     58.0  71.9   4:18 (257, -7)  
Apr. 10   0 24.62    8  2.9   2.121   1.163    12   11.9     60.1  72.6   4:07 (254, -8)  

* C/2003 K4 ( LINEAR )


Well condensed and easy to see. It will be 6.5 mag in the southern sky from autumn to winter in 2004. In the Northern Hemisphere, it is observable in good condition until early September when it becomes to 7.5 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  20 14.95   23 19.5   3.213   2.992    68   12.3     12.6   5.6   4:18 (273, 47)  
Apr. 10  20 15.08   24 52.8   3.040   2.912    73   12.1     14.1 356.8   4:07 (273, 51)  

* C/2003 H1 ( LINEAR )


It is diffused around 11.5 mag visually. It will be lower and fainter gradually in the evening sky after this.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   9 44.94  -21 53.8   1.491   2.287   132   12.2     61.5 290.2  20:54 (  0, 33)  
Apr. 10   9 19.27  -19 25.5   1.614   2.305   121   12.4     49.8 294.2  20:01 (  0, 36)  

* 43P/Wolf-Harrington


It will be lower and lower while fading after this.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   4  5.24   16 34.3   2.049   1.587    49   12.7     43.5  89.5  19:48 ( 92, 28)  
Apr. 10   4 26.43   16 33.2   2.094   1.596    47   12.8     43.5  90.7  19:56 ( 93, 25)  

* 29P/Schwassmann-Wachmann 1


Not observable. It will appear at dawn in May.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  23 40.12    3 40.3   6.672   5.726    17   13.8     12.3  63.4   4:18 (262, -5)  
Apr. 10  23 45.21    4 18.7   6.636   5.725    22   13.8     12.1  63.0   4:07 (263, -3)  

* 58P/Jackson-Neujmin


Not yet recovered in this return. At the previous appearance, it brightened after the perihelion passage and reached to 10 mag. If it has behaved so again, it could have reach to 13 mag in February and March. However, it must be much fainter actually than expected. It will be unobservable soon.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   2 45.86    6 44.8   2.498   1.693    28   13.9     43.4  73.7  19:48 ( 94,  6)  
Apr. 10   3  5.23    8  6.1   2.567   1.738    27   14.1     42.1  74.7  19:56 ( 97,  4)  

* C/2001 HT50 ( LINEAR-NEAT )


Not observable. It will appear at dawn again at 15 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   0 47.88   11 48.8   4.859   3.868     6   14.4      5.4  45.5   4:18 (245,-14)  
Apr. 10   0 49.69   12 15.4   4.904   3.913     7   14.4      5.3  44.0   4:07 (247,-10)  

* 123P/West-Hartley


It became brighter than expected after the perihelion passage, and it was observed visually around 13.5 mag in February and March. After this, it will be fading.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  13  6.20    9 36.9   1.332   2.311   164   14.6     14.0 257.1   0:21 (  0, 65)  
Apr. 10  12 59.81    9 10.6   1.357   2.332   162   14.8     13.9 251.6  23:42 (  0, 64)  

* 40P/Vaisala 1


The brightness evolution is gradual in this return. So it will reach to 15 mag at best.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  16  5.60   -0 31.9   1.126   1.934   130   14.9      7.5  35.4   3:20 (  0, 54)  
Apr. 10  16  6.73    0  9.7   1.109   1.961   136   14.9      5.7   5.2   2:53 (  0, 55)  

* 118P/Sheomaker-Levy 4


Althouhg it must be fainter than 17 mag now, it unexpectedly brightened from February to March and reached to 14.5 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  11 36.86    8 56.4   1.815   2.763   156   15.1      9.7 301.7  22:47 (  0, 64)  
Apr. 10  11 33.38    9 27.6   1.885   2.793   149   15.3      7.5 300.7  22:16 (  0, 64)  

* 81P/Wild 2


It is a bit fainter, and is fading a bit faster than expected before, after it appeared at dawn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  19 21.29  -19 24.6   2.243   2.365    84   15.7     15.0  81.0   4:18 (324, 27)  
Apr. 10  19 28.04  -19  8.6   2.194   2.406    89   15.7     12.7  80.1   4:07 (326, 28)  

* C/2003 T4 ( LINEAR )


It is expected to be 5 mag in 2005 spring. Until that time, it keeps observable in the Northern Hemisphere, which the comet will be getting brighter gradually.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   4 41.51   71 20.8   5.081   4.920    75   15.9      6.0 142.4  19:48 (158, 43)  
Apr. 10   4 47.54   70 49.3   5.083   4.849    70   15.9      6.3 131.8  19:56 (157, 41)  

* 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)  
Apr.  3  19 11.32   29 51.5   5.931   5.888    82   16.9     12.5  17.3   4:18 (272, 63)  
Apr. 10  19 13.04   31 15.0   5.895   5.916    86   16.9     12.2  12.3   4:07 (271, 66)  

* C/2002 J5 ( LINEAR )


It keeps 17 mag until July.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  16 34.87   50 31.5   5.540   5.898   106   16.9     16.1 316.3   3:49 (180, 75)  
Apr. 10  16 26.03   51 49.6   5.529   5.910   107   16.9     16.4 310.4   3:13 (180, 73)  

* C/2003 E1 ( NEAT )


It will be observable at 17.5 mag in good condition until August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  18 22.68    9 37.7   3.016   3.271    95   17.1     10.7  64.4   4:18 (320, 59)  
Apr. 10  18 26.83   10  9.7   2.946   3.279   100   17.1      9.0  60.2   4:07 (325, 61)  

* 48P/Johnson


Not yet observed in this return, but it must be brightening in the morning sky. It will reach to 15 mag in summer.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  19 24.55  -15  1.3   2.564   2.637    83   17.4     18.7  85.3   4:18 (320, 30)  
Apr. 10  19 33.28  -14 50.7   2.456   2.616    87   17.2     17.6  85.3   4:07 (322, 31)  

* P/2002 T5 ( LINEAR )


It will become fainter than 18 mag, and too low to observe in June. It was about 0.5 mag brighter than this ephemeris around the opposition from December to February.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   7 55.47   24 47.5   3.909   4.240   102   17.2      5.2  59.9  19:48 ( 44, 76)  
Apr. 10   7 58.16   25  3.9   4.028   4.254    96   17.3      6.3  70.5  19:56 ( 63, 71)  

* C/2000 SV74 ( LINEAR )


It was observed around 17.5 mag recently. It will be fainter than 18 mag in late May.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  13 44.62    7 35.1   5.967   6.921   161   17.4      9.5 271.0   0:59 (  0, 63)  
Apr. 10  13 40.12    7 35.3   6.001   6.966   163   17.4      9.6 269.2   0:27 (  0, 63)  

* P/2002 T6 ( NEAT-LINEAR )


It reached to 15.5 mag in January, much brighter than expected. Now it is fading.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   6 47.19   11 39.6   3.791   3.891    88   17.4     10.2  80.4  19:48 ( 54, 56)  
Apr. 10   6 52.24   11 50.3   3.912   3.914    82   17.5     11.2  83.0  19:56 ( 62, 51)  

* C/2003 V1 ( LINEAR )


Fading slowly. It will be observable in good condition until May when it will be fainter than 18 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   9 29.11   46  1.3   4.242   4.710   112   17.5      7.0 196.4  20:40 (180, 79)  
Apr. 10   9 28.26   45 12.7   4.390   4.772   106   17.6      7.1 184.7  20:12 (180, 80)  

* C/2003 F1 ( LINEAR )


It will be observable around 17.5 mag until June.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  18 18.76   -6 59.2   4.283   4.537    98   17.7      4.0 179.8   4:18 (333, 44)  
Apr. 10  18 18.38   -7 28.4   4.198   4.562   105   17.7      4.6 200.6   4:07 (339, 45)  

* 2003 WN188


Unusual minor planet with a period of 55 years. It becomes to be at peak in mid February, and fainter than 18 mag in late March.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3   9 47.12   38 53.1   1.536   2.201   118   17.9      8.9  76.8  20:59 (180, 86)  
Apr. 10   9 53.04   38 59.1   1.597   2.200   113   18.0     11.0  91.3  20:37 (180, 86)  

* 117P/Helin-Roman-Alu 1


It was brighter than this ephemeris recently, around 17.5 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
Apr.  3  11 48.28   12  8.7   3.133   4.071   156   18.2      9.1 284.0  22:59 (  0, 67)  
Apr. 10  11 44.27   12 21.4   3.160   4.055   149   18.2      8.1 280.2  22:27 (  0, 67)  

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