Weekly Information about Bright Comets (2000 June 10: North)

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 Updated on June 11, 2000
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.

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

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* C/1999 S4 ( LINEAR )

 Image: 2000 Feb. 12
Now it is about 10.0 mag. It will be 5 mag in 2000 July. In the Northern Hemisphere, it keeps observable until early August. In the Southern Hemisphere, it locates very low between late May and mid June, however, it locates high after late July. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10   2 11.40   34 21.8   1.708   1.158    41   10.0     17.9  27.5   2:59 (241, 19)  
June 17   2 16.67   36 28.8   1.484   1.068    46    9.4     23.3  26.5   2:58 (241, 24)

* C/1999 T1 ( McNaught-Hartley )
It is expected to be bright as 7 mag in late 2000. Northern people cannot observe it until December. No observations reported since it was observed visually as 14.4 mag on Mar. 9. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10   3 57.21  -32  0.8   3.279   2.873    58   12.2     26.5  97.7   2:59 (286,-37)  
June 17   4 12.09  -32 28.5   3.163   2.796    59   12.0     28.0  99.3   2:58 (288,-35)

* C/1997 BA6 ( Spacewatch )

 Image: 1998 Dec. 5
Only southern people can observe it. It will appear again in 2000 August as 13 mag. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  22 50.20  -49 32.6   3.393   3.876   111   13.0      6.8 261.2   2:59 (336, -1)  
June 17  22 44.59  -49 40.5   3.339   3.905   116   13.0      8.9 262.3   2:58 (340,  1)

* 29P/Schwassmann-Wachmann 1

 Image: 1999 June 12
The altitude will be 23 deg at best in the Northern Hemisphere. Now it is not in outburst. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  16 56.06  -32  2.4   5.052   6.055   170   13.4      6.8 280.6  23:38 (  0, 23)  
June 17  16 52.42  -31 52.7   5.062   6.053   165   13.4      6.7 283.1  23:07 (  0, 23)

* C/1999 K5 ( LINEAR )

 Image: 1999 July 31
It is only observable in the Southern Hemisphere until the end of 2001. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10   1 49.12  -73 32.6   2.894   3.264   102   13.4     30.1 114.4   2:59 (341,-32)  
June 17   2 36.88  -74 43.3   2.885   3.260   102   13.4     29.3 106.9   2:58 (342,-33)

* 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)  
June 10   5 36.15  -69 16.1  11.173  11.261    92   13.8      5.0  93.6  20:59 ( 23,-46)  
June 17   5 42.76  -69 19.9  11.215  11.309    92   13.8      5.1  98.9   2:58 (338,-48)

* C/1999 T2 ( LINEAR )

 Image: 2000 Jan. 8
It will be 13 mag at good position in 2000 September. It was reported as 13.5 mag visually. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  22 22.39   52 49.6   3.493   3.450    79   14.1     24.5 328.9   2:59 (222, 61)  
June 17  22 10.93   55 16.0   3.390   3.419    83   14.0     26.3 322.3   2:58 (211, 64)

* C/1999 K8 ( LINEAR )

 Image: 1999 Dec. 30
Because it is far away, it keeps 14 mag until late 2000. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10   1 14.08   13 54.4   4.681   4.219    57   14.1     13.2  94.6   2:59 (267, 20)  
June 17   1 20.21   13 45.0   4.596   4.225    62   14.1     12.5  97.4   2:58 (270, 24)

* 47P/Ashbrook-Jackson
It will be 14 mag from August to November. But the altitude keeps lower than 20 deg until late August. It was observed as about 16 mag on May 3. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  20 51.15  -35 17.1   1.936   2.719   131   15.0      3.9 161.9   2:59 (352, 19)  
June 17  20 51.16  -35 44.3   1.856   2.696   137   14.8      4.2 196.8   2:58 (358, 19)

* C/1999 J2 ( Skiff )

 Image: 2000 Jan. 28
It will be observable as 15 mag with a good condition. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  15 37.01   36  0.1   6.608   7.122   116   15.1     10.9 234.4  22:19 (180, 89)  
June 17  15 32.12   35 12.7   6.656   7.125   113   15.1     10.9 228.8  21:47 (180, 90)

* 9P/Tempel 1
Low in the morning sky. It was fainter than 14.5 mag on May 15 by Biver. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10   0 11.10  -10 42.7   2.020   2.121    81   15.2     18.7  79.3   2:59 (297, 18)  
June 17   0 19.32  -10 22.1   1.981   2.162    85   15.4     16.4  81.6   2:58 (300, 21)

* 2000 GK137
New near-earth astedoid. It will be brighter than 16 mag until mid July. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  17 59.36   35 38.9   0.233   1.151   120   15.7     72.1  27.4   0:45 (180, 90)  
June 17  18 23.16   43 27.2   0.207   1.112   112   15.6     83.5  33.0   0:40 (180, 82)

* C/1999 H3 ( LINEAR )

 Image: 2000 Feb. 17
It will fade out gradually after this, but it can be observed as 17.5 mag in 2001 spring. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  10 42.71   30 34.4   4.609   4.405    72   16.1     11.4 193.6  20:59 (100, 45)  
June 17  10 41.68   29 18.0   4.756   4.442    66   16.2     10.8 186.5  21:03 (102, 38)

* C/2000 CT54 ( LINEAR )
It will be 13.5 mag in 2001 July, however, it will not be obesrvable after July in the Northern Hemisphere. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  12 54.79  -27 17.9   4.081   4.696   121   16.3      4.7 265.9  20:59 ( 20, 25)  
June 17  12 52.71  -27 21.2   4.126   4.651   115   16.3      3.3 258.7  21:03 ( 27, 22)

* C/2000 K1 ( LINEAR )
New comet. Although it will be fading after this, it is observable as 17 mag even in 2001 spring because it is very far. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  16 23.53   11 19.9   5.549   6.394   143   16.3     13.5 295.0  23:06 (  0, 66)  
June 17  16 17.82   11 56.8   5.602   6.403   138   16.3     12.7 292.5  22:32 (  0, 67)

* 95P/(2060) Chiron

 Image: 1999 June 12
It keeps over 30 deg high until end of August. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  16 52.18  -17  1.7   9.082  10.089   172   16.3      4.2 278.4  23:35 (  0, 38)  
June 17  16 50.19  -16 57.7   9.112  10.101   166   16.3      4.0 277.6  23:05 (  0, 38)

* 44P/Reinmuth 2
In the Northern Hemisphere, it keeps 16 mag and 25 deg high until late August. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  16 29.28  -29 21.3   1.739   2.740   168   16.8     13.3 287.1  23:11 (  0, 26)  
June 17  16 22.70  -28 51.9   1.725   2.707   161   16.7     12.7 290.6  22:37 (  0, 26)

* C/2000 K2 ( LINEAR )
New comet. It will be observable as 16.5-17 mag until late October. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  17 19.82   12 23.2   1.891   2.782   144   16.8      9.3 319.5   0:06 (  0, 67)  
June 17  17 16.92   13  5.9   1.866   2.746   142   16.7      7.9 310.4  23:32 (  0, 68)

* C/1999 K2 ( Ferris )

 Image: 1999 May 31
Fading gradually. It keeps 17-18 mag at good position until October. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  20 23.96   34 47.8   5.758   6.127   106   17.2     12.3 323.4   2:59 (275, 88)  
June 17  20 19.47   35 54.3   5.728   6.152   110   17.2     12.3 317.6   2:38 (180, 89)

* C/1999 N4 ( LINEAR )
It keeps 17 mag at good position until August. It was bright as 16.4 mag on Apr. 15. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  16 56.03    5 32.8   4.595   5.506   151   17.2     20.4 274.4  23:38 (  0, 61)  
June 17  16 46.60    5 40.9   4.621   5.508   147   17.2     19.9 272.2  23:01 (  0, 61)

* P/2000 G1 ( LINEAR )
New comet with a period of 5.4 years. It must be 12 mag and moving fast in March, when it was 0.1 AU from the earth. Although it was fading out rapidly in April, reported as 16.8 mag in Apr. 23, it was bright as 15.5 mag in May. It was reported as faint as 17 mag after mid May. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  17  7.08    3 21.6   0.591   1.567   153   17.5     17.0 238.7  23:49 (  0, 58)  
June 17  17  1.13    2 14.1   0.659   1.629   152   17.9     15.0 226.5  23:16 (  0, 57)

* P/2000 C1 ( Hergenrother )

 Image: 2000 Feb. 11
It was in fact a bit brighter than this ephemeris. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  12 18.67    6 18.1   1.731   2.184   102   17.6     18.5 121.0  20:59 ( 50, 51)  
June 17  12 26.46    5  9.4   1.817   2.200    97   17.7     20.0 120.2  21:03 ( 55, 46)

* C/1999 F2 ( Dalcanton )

 Image: 1999 June 30
It keeps the good condition until autumn. It will fade out gradually. 
Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1    Mot.(') p.a.  Best Time(A, h)  
June 10  17 13.90   30 27.2   6.218   6.871   126   17.6      6.1 291.8   0:00 (  0, 85)  
June 17  17 10.87   30 39.6   6.269   6.907   125   17.7      5.7 283.4  23:26 (  0, 86)

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