Weekly Information about Bright Comets (2007 Dec. 8: North)

Japanese version
Home page
 Updated on December 12, 2007
Last week South Next week

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

---------------------------------------------------------------------

* 17P/Holmes

Great outburst occured on Oct. 24, and it bacame a naked eye comet of 2 mag. It still keeps so bright as 2.7 mag on Dec. 9. It was completely stellar just after the outburst, however, then a round disk like coma is getting larger gradually. The coma diameter has increased up to about 70 arcmin, and the comet has bacome very diffuse. So it looks like a huge nebula now. This comet was also in great outburst at the discovery in 1892 and became so bright as 4 mag. At that time, the comet faded after the first outburst, but soon brightened again in the second outburst. The further brightness is uncertain. But the comet will be observable in excellent condition for a while after this. It will be bright and easily visible with naked eyes for a while after this in the dark sky. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   3  5.54   47 57.7   1.738   2.616   146    3.9  21:58 (180, 77)  
Dec. 15   3  1.32   46 51.5   1.796   2.645   142    4.2  21:26 (180, 78)

* 8P/Tuttle

It will reach to 6 mag in January, and will be observable in good condition. Now it is brightening very rapidly. It is already bright as 7.9 mag (Dec. 9, Seiichi Yoshida), large bright diffuse object visually. In the Northern Hemisphere, it keeps observable all night until mid December, then keeps observable until early February, when it fades down to 7.5 mag. In the Southern Hemisphere, it is not observable until late December. But after that, it keeps observable until it fades out. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  22 40.57   80 19.2   0.519   1.272   111    8.7  18:18 (178, 45)  
Dec. 15  23 58.14   73 11.6   0.413   1.215   114    7.8  18:27 (180, 52)

* C/2007 T1 ( McNaught )

Now it is 10.6 mag (Oct. 14, Mike Linnolt). It is already unobservable in the Northern Hemisphere. In the Southern Hemisphere, it is not observable now for one month after mid November, but it will be observable in good condition at 10 mag from mid December to February. In the Northern Hemisphere, it will appear in the evening sky at 11 mag in March, then it keeps observable while fading gradually until May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  17  5.58  -43  6.0   1.831   0.972    20    9.7  18:18 ( 54,-26)  
Dec. 15  17  4.89  -46 54.4   1.781   0.970    24    9.6   5:29 (311,-25)

* C/2007 F1 ( LONEOS )

Already unobservable in the Northern Hemisphere, but it is observable in the evening low sky in the Southern Hemisphere. It approached down to 0.4 A.U. to the sun on Oct. 28, and it reached to 5.3 mag (Oct. 25, Juan Jose Gonzalez). Now it is fading. It has already faded down to 10.1 mag (Dec. 1, Marco Goiato). The brightening became very slow just before the perihelion passage, but it started fading rapidly after the perihelion passage. It will never be observable again in the Northern Hemisphere. But in the Southern Hemisphere, it keeps observable while fading gradually, although it will not locate very high. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  17 44.04  -55 52.2   1.689   1.037    34   11.3  18:18 ( 38,-26)  
Dec. 15  17 53.92  -58  4.9   1.824   1.167    35   12.0  18:20 ( 37,-29)

* 46P/Wirtanen

Brightening rapidly. Now it is 11.1 mag (Dec. 1, Marco Goiato), already bright visually. It will reach to 8.5 mag from January to March, and will be observable in good condition. In the Northern Hemisphere, it keeps observable in good condition until 2008 July when it becomes fainter than 18 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  22 37.73  -21 59.0   1.075   1.293    77   12.0  18:18 ( 13, 32)  
Dec. 15  22 52.14  -19 24.7   1.064   1.245    74   11.5  18:20 ( 18, 34)

* C/2006 Q1 ( McNaught )

Now it is bright as 12.5 mag and visible visually (Dec. 9, Seiichi Yoshida), brightening well as expected. It will reach to 11 mag in 2008 spring. It will keep bright for a long time, however, it keeps moving in the southern sky for a while after this. In the Northern Hemisphere, it will appear at 13 mag from October to December in a short time, but very low and hard to observe. However, it will be visible visually at 11 mag in the evening sky from March to June in 2008. Then it becomes unobservable again. But it will appear in the morning sky again at 13 mag at the end of 2008, then it keeps bright and observable for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   9 44.23  -46 27.0   3.419   3.480    85   12.9   4:39 (  0,  9)  
Dec. 15   9 47.90  -47 35.1   3.325   3.439    88   12.8   4:15 (  0,  7)

* (3200) Phaethon

It passed very near by the Earth in early December, and became bright as 12.6 mag (Dec. 5, Juan Jose Gonzalez). The very fast motion was easily observed in the excellent condition. However, it has already turned to fade out and move lower very rapidly. It has faded down to 14.0 mag on Dec. 9 (Seiichi Yoshida). It will be unobservable within a few days. Then it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  12  2.11    8  9.4   0.130   0.967    78   13.1   5:24 (317, 57)  
Dec. 15  15 42.83  -23  1.1   0.160   0.841    24   18.7   5:29 (300,  3)

* 29P/Schwassmann-Wachmann 1

Now it is faint as 14.0 mag (Dec. 8, Seiichi Yoshida). It has been observable since late July, but it keeps faint in this season. It has never be brighter than 14 mag yet. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   6 17.68   30 51.1   5.038   5.974   160   13.3   1:14 (  0, 86)  
Dec. 15   6 13.96   30 50.8   5.012   5.976   167   13.3   0:42 (  0, 86)

* 93P/Lovas 1

Now it is bright and visible visually at 12.8 mag (Dec. 8, Seiichi Yoshida). It keeps locating in good position for a while after this. But it will start fading gradually after January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   0 39.42   26 36.0   0.967   1.707   122   13.4  19:33 (  0, 82)  
Dec. 15   0 48.52   27  2.4   1.009   1.705   117   13.5  19:14 (  0, 82)

* C/2006 OF2 ( Broughton )

It is already bright and visible visually at 13.5 mag (Nov. 13, Juan Jose Gonzalez). It will reach to 10.5 mag and will be observable in good condition in 2008 autumn. It keeps observable in good condition for a long time while the comet is getting brighter slowly. However, it was observed fainter than this ephemeris recently. So maybe it became fainter than in autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  21 28.63   -4 36.3   4.097   3.838    67   13.9  18:18 ( 41, 42)  
Dec. 15  21 33.56   -3 57.4   4.140   3.785    62   13.9  18:20 ( 48, 39)

* C/2006 S5 ( Hill )

Now it is bright as 14.0 mag and visible visually (Dec. 8, Seiichi Yoshida). It keeps observable in good condition for a long time until 2008 spring. It will keep visible visually at 14 mag until March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   7 58.67   20 14.6   1.817   2.630   137   14.0   2:54 (  0, 75)  
Dec. 15   7 58.68   19 37.5   1.765   2.631   144   13.9   2:27 (  0, 75)

* C/2006 VZ13 ( LINEAR )

It reached to 7.2 mag on July 14 (Maik Meyer), then it faded down to 9.0 mag on Aug. 13 (Carlos Labordena). Although it had been unobservable for a while, now it is observable again. In the Southern Hemisphere, it keeps observable while fading gradually. In the Northern Hemisphere, it will be fading while keeping extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  11 37.47  -43  5.2   2.286   2.115    67   14.3   5:24 (347, 10)  
Dec. 15  11 23.10  -45  2.8   2.247   2.199    74   14.5   5:29 (356, 10)

* 110P/Hartley 3

Now it is 14.4 mag and visible visually (Dec. 9, Seiichi Yoshida). It will be observable at 14.5-15 mag in an excellent condition until February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   5 24.22   32 18.7   1.540   2.513   168   14.6   0:20 (  0, 87)  
Dec. 15   5 17.94   31 40.2   1.530   2.507   171   14.6  23:42 (  0, 87)

* P/2007 H1 ( McNaught )

It reached up to 12.6 mag and was bright visually in autumn (Oct. 5, Seiichi Yoshida). Now it is fading, but it is still bright and visible visually at 14.0 mag (Dec. 9, Seiichi Yoshida). It keeps observable in good condition for a while after this. It will be visible visually for some more time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   0 16.20  -11 43.9   1.985   2.410   103   14.8  19:09 (  0, 43)  
Dec. 15   0 22.44  -10 46.5   2.082   2.425    98   15.0  18:48 (  0, 44)

* C/2006 U6 ( Spacewatch )

Now it is 15.9 mag (Sept. 8, Ken-ichi Kadota), brightening as expected. It will reach to 13.5 mag in the southern sky in 2008 spring and summer. In the Southern Hemisphere, it keeps observable for a long time after this. But in the Northern Hemisphere, it keeps locating extremely low until January, and will be unobservable after that. Then it will be observable again at the end of 2008, when the comet will already fade down to 15 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   0 16.41  -47  9.0   3.060   3.150    86   14.9  19:09 (  0,  8)  
Dec. 15   0 15.62  -47 13.9   3.108   3.107    80   14.9  18:41 (  0,  8)

* C/2006 K4 ( NEAT )

Now it is 15.8 mag (Sept. 2, R. Salvo). It keeps 15 mag for a long time until 2008 spring. It moves in the southen sky, so it keeps observable in good condition in the Southern Hemisphere, although it becomes low only in winter. It will never be observable again in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  17 21.19  -62 30.1   3.880   3.190    40   15.0  18:18 ( 32,-31)  
Dec. 15  17 28.77  -63 34.0   3.878   3.192    40   15.0  18:20 ( 32,-34)

* 192P/2007 T3 ( Shoemaker-Levy 1 )

It was recovered at 18.0 mag on Oct. 12, as bright as expected. It is getting higher in the evening also in the Northern Hemisphere. It will reach to 14.5 mag from December to February in the evening sky. But the altitude will be around 30 deg. Then it is observable until April when it becomes too low at 17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  21 56.71  -32 13.5   1.557   1.465    65   15.3  18:18 ( 20, 20)  
Dec. 15  22 18.71  -28 36.2   1.578   1.460    64   15.1  18:20 ( 22, 23)

* C/2005 L3 ( McNaught )

It was visible visually at 14 mag from spring to autumn in 2007. Now it is not observable. But it will be observable at 14 mag at high location again in 2008 spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  17  0.07   -0  8.2   6.498   5.600    22   15.1  18:18 ( 93, -5)  
Dec. 15  17  2.37    0 10.6   6.482   5.598    24   15.1   5:29 (270,  0)

* C/2006 V1 ( Catalina )

It was observed at 16 mag in 2007 spring and summer. Although it had been unobservable for a while, now it is appearing again in the Southern Hemisphere. It keeps 16 mag and observable in good condition after this until 2008 summer. In the Northern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  15 16.45  -41 38.2   3.504   2.678    28   15.2   5:24 (314,-11)  
Dec. 15  15 34.48  -42 58.1   3.483   2.682    30   15.2   5:29 (316,-10)

* C/2007 G1 ( LINEAR )

Now it is 15.6 mag (Nov. 24, Ken-ichi Kadota). Now it is not observable temporarily. But it will be getting higher in the morning sky after January. It will be bright at 12 mag for a long time from 2008 spring to 2009 spring. However, it is only observable until August in the Northern Hemisphere because the comet moves southwards. It keeps observable for a long time in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  17 15.10    4 28.0   5.199   4.349    27   15.5  18:18 ( 95,  1)  
Dec. 15  17 20.36    3 36.3   5.153   4.298    26   15.4   5:29 (264, -2)

* C/2006 XA1 ( LINEAR )

It reached to 13.2 mag in last spring (May 12, Carlos Labordena). But it had been unobservable for a long time after that. In the Southern Hemisphere, it is appearing in the morning sky. But in the Northern Hemisphere, it will be too low to observe. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  14  2.30  -36 13.3   3.165   2.491    39   15.4   5:24 (320,  3)  
Dec. 15  14 15.58  -38  4.3   3.173   2.548    43   15.6   5:29 (324,  4)

* C/2007 B2 ( Skiff )

Now it is 16.1 mag (Nov. 30, Ken-ichi Kadota), brightening as expected. It will reach to 13.5 mag from March to July in 2008, and will be visible visually. It keeps observable in good condition for a long time until next May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  12 24.40   12 12.9   4.014   3.880    75   15.6   5:24 (304, 55)  
Dec. 15  12 29.70   11 31.1   3.875   3.839    80   15.5   5:29 (314, 59)

* 50P/Arend

Now it is visible visually at 15.0 mag (Dec. 8, Seiichi Yoshida). It keeps observable in good condition until it fades out in 2008 spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   1 52.93   45 31.1   1.117   1.953   136   15.5  20:46 (180, 79)  
Dec. 15   1 54.65   45  8.1   1.165   1.964   131   15.6  20:20 (180, 80)

* C/2006 W3 ( Christensen )

It is already bright as 14.3 mag and visible visually (Dec. 9, Seiichi Yoshida). It is expected to reach to 11 mag in 2009 summer. Because it moves in the northern sky, it keeps observable until it becomes brightest in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   5 16.94   63 52.3   5.276   6.050   138   15.6   0:14 (180, 61)  
Dec. 15   5  0.80   64  8.7   5.226   6.002   138   15.6  23:24 (180, 61)

* 191P/2007 N1 ( McNaught )

It brightened after the perihelion passage, and now it reached up to 14.1 mag and became visible visually (Dec. 8, Seiichi Yoshida). It will be observable in good condition for a while. But it can be fading rapidly after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   2 37.73    3 11.9   1.294   2.152   141   15.9  21:30 (  0, 58)  
Dec. 15   2 37.22    4  4.8   1.361   2.169   134   16.1  21:02 (  0, 59)

* C/2006 K1 ( McNaught )

Now it is 16.2 mag (Nov. 24, Ken-ichi Kadota). Although it had been observable only in the Southern Hemisphere for a long time, now it becomes observable also in the Northern Hemisphere. It keeps observable in the evening sky until March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   3  0.10  -24 44.1   3.937   4.571   124   16.1  21:52 (  0, 30)  
Dec. 15   2 56.33  -23 26.2   4.005   4.586   120   16.1  21:21 (  0, 32)

* 188P/2007 J7 ( LINEAR-Mueller )

First return of a new periodic comet discovered in 1998 at 14 mag. It was visible visually at 14.4 mag in autumn (Oct. 6, Seiichi Yoshida). But it will be fading gradually after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  23 55.36    5  9.7   2.106   2.553   105   16.2  18:48 (  0, 60)  
Dec. 15   0  0.46    5 55.1   2.191   2.552    99   16.3  18:26 (  0, 61)

* 2005 WY3

Peculiar asteroid moving on a cometary orbit. It was asteroidal at 18 mag in late August. It will reach to 15 mag in February and March. In the Northern Hemisphere, it keeps observable until July when it becomes fainter than 18 mag. It may show a cometary activity after this, although the perihelion distance is somewhat large as 1.8 A.U. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   9 21.04  -25 30.9   1.413   1.856    99   16.4   4:16 (  0, 30)  
Dec. 15   9 30.88  -27 17.1   1.351   1.836   102   16.3   3:58 (  0, 28)

* 70P/Kojima

Now it is 16.8 mag (Nov. 23, Ken-ichi Kadota), brightening as expected. It keeps observable at 16.5 mag in good condition for a long time until next April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  11 46.24    4 58.3   1.996   2.076    80   16.5   5:24 (325, 55)  
Dec. 15  11 57.11    4 15.3   1.934   2.090    84   16.4   5:29 (334, 57)

* 74P/Smirnova-Chernykh

It will reach to 15 mag in 2009 and 2010. Now it is 17.3 mag (Nov. 4, J. A. Henriquez). It will be observable at 16.5 mag in good condition until winter in this year. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   5 12.94   23 10.6   3.059   4.043   176   16.6   0:09 (  0, 78)  
Dec. 15   5  7.82   23 12.5   3.052   4.034   175   16.5  23:32 (  0, 78)

* C/2003 WT42 ( LINEAR )

It was observed visually as bright as 13 mag from late 2005 to early 2006. Now it is fading. It is appearing in the morning sky again. It will be observable in good condition at 17 mag for a long time until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  14  8.44    1  6.4   7.472   6.843    47   16.7   5:24 (291, 29)  
Dec. 15  14 11.99    0 43.9   7.420   6.875    53   16.7   5:29 (297, 34)

* C/2006 K3 ( McNaught )

Before the perihelion passage, it kept 16.5-17 mag and hardly brightened. Now it has faded down to 17.9 mag (Nov. 17, Ken-ichi Kadota). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   0 21.83   56 28.2   3.167   3.762   120   16.8  19:14 (180, 69)  
Dec. 15   0 12.87   55 27.9   3.287   3.813   115   16.9  18:38 (180, 70)

* 117P/Helin-Roman-Alu 1

It reached to 13.5 mag and became visible visually in 2005 and 2006. Now it has gone far away. But the fading has been slower than predicted, and it is still bright as 16.3 mag (Nov. 7, Ken-ichi Kadota). It will be observable in good condition until February, and will keep 16-17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   1 43.59    6 24.3   3.557   4.266   130   16.9  20:36 (  0, 61)  
Dec. 15   1 42.25    6 30.8   3.658   4.281   123   17.0  20:07 (  0, 62)

* C/2007 U1 ( LINEAR )

It will reach to 15.5 mag in 2008 autumn and will be observable in good condition. In this winter, it is observable at 17 mag in good condition until March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   6 46.98    2  0.1   3.164   4.020   146   17.0   1:43 (  0, 57)  
Dec. 15   6 33.37    2 14.5   3.079   3.985   153   16.9   1:02 (  0, 57)

* P/2007 T6 ( Catalina )

It will be observable at 17 mag in good condition until February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   9 25.78   22 32.4   1.772   2.403   118   17.0   4:21 (  0, 77)  
Dec. 15   9 28.79   23 47.2   1.720   2.424   125   17.0   3:56 (  0, 79)

* C/2006 M1 ( LINEAR )

Now it is 17.5 mag (Nov. 25, Ken-ichi Kadota). It is outside of Jupiter's orbit. So it keeps 17 mag for a long time until winter. It keeps locating high and observable in good condition for a long time after this because it moves in the northern sky. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   2 32.78   19 38.4   3.564   4.419   146   17.2  21:25 (  0, 75)  
Dec. 15   2 30.92   18 25.6   3.668   4.454   138   17.3  20:56 (  0, 73)

* 65P/Gunn

It will reach to 13 mag in 2010. Now it is around the aphelion, but it will be observable at 17 mag in good condition in autumn and winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   9  5.09   26 40.7   3.726   4.353   123   17.3   4:00 (  0, 82)  
Dec. 15   9  3.81   27  5.9   3.628   4.341   131   17.2   3:32 (  0, 82)

* C/2007 W1 ( Boattini )

It will pass 0.85 A.U. from the sun in late June in 2008, and it is expected to reach to 6 mag. In the Northern Hemipshere, it keeps observable in good condition for a long time after this, while the comet is brightening gradually. The comet will be 14 mag in February and become visible visually. Then it is observable until around May 25, when the comet will be 7.5 mag. It will be unobservable for one and a half month around the perihelion passage. But it will appear in the morning sky again at 7 mag in early July, then it keeps observable after that while the comet is fading gradually. In the Southern Hemipsphere, it keeps observable all the period until the comet fades out, although it will be low in mid June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  12  2.53   -1 57.0   3.258   3.134    74   17.5   5:24 (325, 47)  
Dec. 15  12  8.89   -2 51.8   3.076   3.052    79   17.3   5:29 (334, 49)

* C/2007 T5 ( Gibbs )

It will be observable at 17.5 mag in good condition until May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   8 36.48   25  0.4   3.574   4.274   129   17.6   3:32 (  0, 80)  
Dec. 15   8 35.76   26  8.8   3.480   4.256   137   17.5   3:04 (  0, 81)

* P/2007 V1 ( Larson )

Now it is observable in good condition at 17.5 mag. But it will be fainter than 18 mag in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   2 53.31   29 55.3   1.769   2.677   151   17.5  21:45 (  0, 85)  
Dec. 15   2 50.58   29 44.8   1.814   2.677   144   17.6  21:15 (  0, 85)

* C/2007 D1 ( LINEAR )

Now it is 17.8 mag (Nov. 18, Ken-ichi Kadota). It was observed at 17.5 mag in early 2007. It will be observable at 17.5 mag again in this winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  11 10.18   -2 19.0   8.864   8.850    85   17.7   5:24 (344, 51)  
Dec. 15  11 11.43   -2 17.2   8.752   8.854    92   17.7   5:29 (356, 53)

* C/2007 M2 ( Catalina )

It keeps 16 mag for one year from 2008 spring to 2009 spring. In the Northern Hemisphere, it keeps observable in good condition while the comet is brightening until 2008 spring. But the comet moves southwards after that, and it will never observable after 2008 July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  12 52.97   15 53.9   5.036   4.806    70   17.8   5:24 (292, 53)  
Dec. 15  12 54.56   15 22.2   4.890   4.766    77   17.7   5:29 (301, 58)

* P/2004 F3 ( NEAT )

It was observed bright as 14-15 mag in 2004 and 2005. Now it is close to the aphelion, but it will be observable at 17.5 mag in good condition in 2007 autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   2 42.65    4 47.5   4.089   4.913   143   17.7  21:35 (  0, 60)  
Dec. 15   2 39.74    4 54.6   4.169   4.921   135   17.8  21:04 (  0, 60)

* 179P/2006 U2 ( Jedicke )

Now it is 17.5 mag (Nov. 7, Ken-ichi Kadota). Now it is at maximum of brightness, but it keeps observable in good condition for a while after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   3 20.92   -4 57.0   3.250   4.087   143   17.8  22:13 (  0, 50)  
Dec. 15   3 17.91   -4 34.1   3.303   4.087   137   17.8  21:42 (  0, 50)

* 180P/2006 U3 ( NEAT )

No observations have been reported recently, but it must have already brightened up to 18 mag. It will be observable in good condition for a hile until spring. It will reach to 16.5 mag in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8  10 39.32   24 10.9   2.305   2.700   102   17.9   5:24 (348, 79)  
Dec. 15  10 45.91   24 38.3   2.205   2.683   108   17.8   5:13 (  0, 80)

* 173P/2005 T1 ( Mueller 5 )

It was observed at 16.5-17 mag in last winter. It will be observable in good condition also in this winter. It should be 16 mag by calculation. However, it was so faint as 18.5 mag in autumn, much fainter than expected. It was observed so faint around the perihelion passage in the previous apparition at the discovery. So maybe it suddenly faded out before the perihelion passage again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  8   8  5.29   23 34.7   3.499   4.271   136   18.5   3:01 (  0, 79)  
Dec. 15   8  3.31   24  3.0   3.427   4.266   144   18.5   2:31 (  0, 79)

---------------------------------------------------------------------

Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.