Weekly Information about Bright Comets (2001 July 21: South)

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Updated on July 22, 2001
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.

Please see also the Comet Rendezvous Calendar, Latest Pictures of Comets.

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* C/2001 A2 ( LINEAR )


It bursted out and reached to 4.5-5.0 mag on July 12, then it faded to 6 mag. It will fade out rapidly after this.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  21 39.76   18 41.9   0.384   1.312   134    6.6     87.5 288.4   1:47 (180, 36)  
July 28  21  5.22   20 47.8   0.473   1.408   139    7.4     58.5 280.3   0:45 (180, 34)  

* 19P/Borrelly


Appearing at dawn also in the Northern Hemisphere. It reaches to 8 mag in autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   4 30.96    4  2.2   1.859   1.502    53   10.3     46.6  68.6   5:34 (237, 32)  
July 28   4 51.48    6  1.1   1.805   1.470    54   10.0     47.3  69.0   5:30 (235, 31)  

* C/1999 Y1 ( LINEAR )


Appearing at dawn. However, it never locates high and will not be observable after August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   0 52.01  -24 57.1   2.758   3.301   113   12.3     29.7 200.2   4:57 (180, 80)  
July 28   0 45.83  -28 18.4   2.683   3.325   121   12.3     32.5 204.3   4:23 (180, 83)  

* 144P/2000 O2 ( Kushida )


Not observable until December when it becomes fainter than 17.5 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   8  0.46   18 35.0   2.471   1.456     1   13.0     48.7 102.7   5:34 (259,-17)  
July 28   8 23.49   17 14.1   2.486   1.472     2   13.2     48.0 104.6   5:30 (260,-16)  

* 29P/Schwassmann-Wachmann 1


Mitsunori Tsumura reported it is in outburst at 14.0 mag on July 14.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  18 50.49  -28 23.2   4.947   5.922   162   13.3      6.4 274.0  22:52 (180, 83)  
July 28  18 47.23  -28 19.3   4.984   5.920   154   13.3      5.9 276.3  22:21 (180, 83)  

* C/2000 CT54 ( LINEAR )


It is not observable in the Northern Hemisphere until when it locates low in the evening sky at 15 mag in December.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   0 51.03  -73 27.3   2.610   3.170   114   13.6      4.9 219.7   4:56 (  0, 52)  
July 28   0 43.88  -73 51.2   2.606   3.178   115   13.6      6.2 241.2   4:22 (  0, 51)  

* C/2000 WM1 ( LINEAR )


It reaches to 4 mag in 2002 January.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   3 41.85   48  1.5   3.532   3.120    58   14.7     13.9  76.9   5:34 (202,  2)  
July 28   3 51.27   48 23.4   3.366   3.032    62   14.5     13.7  76.7   5:30 (199,  3)  

* C/2000 SV74 ( LINEAR )


It will be observable brighter than 15 mag until the end of 2002.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   2 16.82   38 13.1   4.523   4.365    74   14.7     14.2  10.5   5:34 (190, 16)  
July 28   2 18.01   39 52.7   4.388   4.330    80   14.6     14.5   5.2   5:30 (185, 15)  

* 51P/Harrington


KenIchi Kadota, Ageo, Japan, observed it at 15.1 mag on July 1.It will fade gradually after this.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   3 36.34   11 22.0   1.800   1.635    64   14.7     37.2  80.1   5:34 (219, 35)  
July 28   3 53.47   12  2.4   1.776   1.656    66   14.8     35.6  81.5   5:30 (217, 35)  

* C/2001 K5 ( LINEAR )


It reaches to 13.5 mag in 2002 summer, and keeps observable for a long while.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  15  4.74  -17 14.6   5.736   6.162   110   14.7      5.6 352.2  19:07 (180, 72)  
July 28  15  4.64  -16 37.5   5.819   6.135   103   14.7      5.1   3.9  18:42 (178, 72)  

* C/1999 T2 ( LINEAR )


It will set in the evening sky in August, then appear in the morning sky at 16 mag in November.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  12 58.57   14 29.3   4.031   3.814    70   14.8     13.8 188.6  18:38 (151, 35)  
July 28  12 57.97   12 55.7   4.180   3.853    64   15.0     13.1 182.2  18:42 (141, 33)  

* C/2000 OF8 ( Spacewatch )


In the Northern Hemisphere, it is not observable, will appear at dawn in November at 16.5 mag and fade.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  12 23.42  -32 13.6   2.079   2.180    81   15.0     24.6 331.3  18:38 ( 86, 62)  
July 28  12 18.12  -29 57.2   2.230   2.175    73   15.1     19.2 335.8  18:42 ( 86, 54)  

* C/1995 O1 ( Hale-Bopp )


Only southern people can observe it. Northern people can never see it again.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   6  1.26  -74  9.7  13.741  13.895    96   15.1      4.4 124.9   5:34 (341, 39)  
July 28   6  7.28  -74 28.3  13.792  13.939    96   15.1      4.4 129.9   5:30 (342, 41)  

* C/1999 T1 ( McNaught-Hartley )


Fading out gradually. It locates in the northern sky and the northern people can observe it until it disappears.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  16 26.46   71  5.8   3.228   3.234    81   15.1     12.6 184.0  20:29 (180,-16)  
July 28  16 26.38   69 35.1   3.300   3.309    81   15.3     13.3 176.7  20:01 (180,-14)  

* C/1999 U4 ( Catalina-Skiff )


Getting higher in the morning sky. It is observable until 2002 autumn at 15 mag.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   6 15.75   62 25.8   5.632   4.976    45   15.2     16.3  72.3   5:34 (209,-23)  
July 28   6 31.64   62 59.5   5.584   4.968    48   15.2     16.3  72.9   5:30 (207,-22)  

* P/2001 MD7 ( LINEAR )


New periodic comet. It locates in the evening sky until 2002 April and reaches to 13.7 mag in November.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  18 42.09  -13 51.2   1.004   1.989   159   15.5     19.9 238.8  22:43 (180, 69)  
July 28  18 34.14  -15  7.6   0.977   1.934   152   15.3     19.5 233.8  22:08 (180, 70)  

* 16P/Brooks 2


Yusuke Ezaki observed it at 16.8 mag on July 14. It will keep the current brightness until October. Not yet observed in this return. It appears at dawn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   3  0.68   15 17.9   1.891   1.835    71   15.5     33.9  78.7   5:34 (207, 35)  
July 28   3 16.59   16  0.0   1.836   1.836    73   15.4     32.9  80.3   5:30 (205, 35)  

* 47P/Ashbrook-Jackson


Appearing at dawn. No observations reported since 2001 Feb. 3.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   4 14.90   29  5.5   3.177   2.669    51   15.6     22.5  71.0   5:34 (217, 15)  
July 28   4 26.08   29 55.1   3.129   2.692    55   15.7     21.6  71.3   5:30 (214, 16)  

* C/1999 J2 ( Skiff )


It is observable as 15.5 mag until autumn.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  14 59.33    4 46.0   7.453   7.724   101   15.7      6.7 206.9  19:02 (180, 50)  
July 28  14 58.14    4  4.0   7.579   7.741    95   15.8      6.4 198.9  18:42 (176, 51)  

* C/2001 K3 ( Skiff )


It is observable at 16 mag in good condition until late August.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  20 22.16   10 28.9   2.271   3.183   148   15.8     20.4 309.6   0:28 (180, 45)  
July 28  20 14.71   11 53.4   2.290   3.202   148   15.9     19.1 305.7  23:48 (180, 43)  

* 73P/Schwassmann-Wachmann 3


Appearing at dawn. No observations reported since 2001 Jan. 4.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   3 19.61   10 41.8   2.485   2.308    68   16.0     15.5  76.9   5:34 (215, 37)  
July 28   3 26.34   11  3.8   2.454   2.367    73   16.2     13.5  78.0   5:30 (210, 39)  

* 61P/Shajn-Schaldach


Appearing at dawn. No observations reported since 200 Sept. 20.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   4 21.60   17  4.7   2.873   2.385    51   16.2     26.5  84.0   5:34 (226, 24)  
July 28   4 34.32   17 21.4   2.819   2.396    55   16.2     25.7  85.4   5:30 (223, 25)  

* 44P/Reinmuth 2


Appearing at dawn. No observations reported since Aug. 23, 2000.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   4  6.75   26 33.3   2.708   2.261    53   16.5     25.7  77.5   5:34 (217, 18)  
July 28   4 19.60   27  9.5   2.671   2.290    57   16.5     24.5  78.5   5:30 (214, 19)  

* C/1997 BA6 ( Spacewatch )


It will fade out gradually after this. It is now a bit brighter than this ephemeris.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  21 33.86   -2 31.6   5.326   6.235   151   16.6     10.1 282.3   1:40 (180, 58)  
July 28  21 29.15   -2 17.9   5.329   6.281   157   16.6     10.4 279.8   1:07 (180, 57)  

* C/2000 K2 ( LINEAR )


No observations reported since 2001 Jan. 15. It will fade out gradually then it will be fainter than 18 mag in November.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21   2  0.37   11 31.2   3.761   3.832    86   16.6      8.1 100.1   5:34 (191, 43)  
July 28   2  3.81   11 18.9   3.710   3.884    92   16.7      6.8 108.1   5:30 (184, 44)  

* 95P/(2060) Chiron


Fading very slowly. It will be around 17 mag for a year after this.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  17 34.32  -16 57.0   9.991  10.839   145   16.8      2.9 267.8  21:36 (180, 72)  
July 28  17 33.01  -16 58.0  10.075  10.852   138   16.8      2.4 265.7  21:08 (180, 72)  

* C/2000 K1 ( LINEAR )


Fading gradually.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  15  5.89   38 13.3   7.362   7.418    89   17.4      5.0 240.2  19:08 (180, 17)  
July 28  15  3.59   37 54.7   7.464   7.443    84   17.5      4.4 230.3  18:42 (179, 17)  

* C/2001 N2 ( LINEAR )


New comet. It will be 14.5 mag in 2002 July.
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
July 21  22 51.97   39 58.1   4.494   4.899   107   17.7     15.5 287.7   2:58 (180, 15)  
July 28  22 42.32   40 26.6   4.366   4.854   112   17.6     17.1 281.5   2:20 (180, 15)  

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