Weekly Information about Bright Comets (2007 Dec. 1: South)

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Updated on December 2, 2007
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.

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* 17P/Holmes

Great outburst occured on Oct. 24, and it bacame a naked eye comet of 2 mag. It still keeps so bright as 3.0 mag on Dec. 1. 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 45 arcmin, and the comet has bacome very diffuse. So it looks like a huge faint 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.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   3 11.46   48 57.1   1.692   2.587   148    3.6  22:31 (180,  6)  
Dec.  8   3  5.54   47 57.7   1.738   2.616   146    3.9  21:58 (180,  7)  

* 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 9.3 mag (Dec. 1, Maik Meyer), 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.  1  20 48.66   83 44.4   0.631   1.333   108    9.5  20:41 (173,-32)  
Dec.  8  22 40.57   80 19.2   0.519   1.272   111    8.7  20:49 (172,-28)  

* 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.  1  17  6.16  -39 27.0   1.860   0.989    19    9.8  20:41 ( 40,  1)  
Dec.  8  17  5.58  -43  6.0   1.831   0.972    20    9.7  20:49 ( 32, -1)  

* 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.  1  17 33.73  -53 13.5   1.534   0.905    34   10.5  20:41 ( 33, 14)  
Dec.  8  17 44.04  -55 52.2   1.689   1.037    34   11.3  20:49 ( 29, 13)  

* 46P/Wirtanen

Brightening rapidly. Now it is 11.7 mag (Nov. 27, Juan Jose Gonzalez), 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.  1  22 24.87  -24 17.7   1.082   1.345    80   12.4  20:41 ( 94, 51)  
Dec.  8  22 37.73  -21 59.0   1.075   1.293    77   12.0  20:49 ( 93, 45)  

* C/2006 Q1 ( McNaught )

Now it is bright as 13.0 mag and visible visually (Nov. 15, Alan Hale), 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.  1   9 39.71  -45 15.3   3.512   3.521    82   13.0   2:56 (303, 64)  
Dec.  8   9 44.23  -46 27.0   3.419   3.480    85   12.9   2:53 (308, 67)  

* (3200) Phaethon

It has already brightened up to 14.7 mag and has been already visible visually (Nov. 18, Alan Hale). It will pass very near by the Earth in early December, and reach to 13 mag. It is observable in good condition in the morning sky, and will be easy to see visually. However, it turns to fade out and move lower very rapidly after Dec. 10, and it will be unobservable within a few days. Then it will never be observable again. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   9 41.94   25 17.7   0.231   1.082   108   13.4   2:56 (211, 22)  
Dec.  8  12  2.11    8  9.4   0.130   0.967    78   13.1   2:53 (244, 19)  

* 29P/Schwassmann-Wachmann 1

Now it is faint as 13.9 mag (Nov. 29, Katsumi Yoshimoto). 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.  1   6 21.09   30 50.0   5.078   5.971   152   13.3   1:45 (180, 24)  
Dec.  8   6 17.68   30 51.1   5.038   5.974   160   13.3   1:14 (180, 24)  

* 93P/Lovas 1

Now it is bright and visible visually at 13.6 mag (Nov. 3, Seiichi Yoshida). It is observable at 13.5 mag in good condition from autumn to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   0 32.37   26 13.0   0.929   1.713   126   13.4  20:41 (168, 28)  
Dec.  8   0 39.42   26 36.0   0.967   1.707   122   13.4  20:49 (161, 26)  

* C/2006 OF2 ( Broughton )

It is already bright and visible visually at 13.9 mag (Nov. 3, Seiichi Yoshida). 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.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1  21 24.29   -5 11.5   4.050   3.890    73   13.9  20:41 (104, 28)  
Dec.  8  21 28.63   -4 36.3   4.097   3.838    67   13.9  20:49 (100, 21)  

* C/2006 S5 ( Hill )

Now it is 14.2 mag (Nov. 4, Alan Hale), already visible visually. It will reach to 14 mag in winter, and will be observable in good condition. It keeps observable in good condition for a long time until 2008 spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   7 57.43   20 53.1   1.877   2.632   131   14.1   2:56 (187, 34)  
Dec.  8   7 58.67   20 14.6   1.817   2.630   137   14.0   2:53 (180, 35)  

* 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.  1  11 48.88  -41  2.7   2.323   2.030    60   14.1   2:56 (297, 40)  
Dec.  8  11 37.47  -43  5.2   2.286   2.115    67   14.3   2:53 (298, 47)  

* 110P/Hartley 3

It brightened very rapidly in a short time, and now it reached to 15.3 mag (Nov. 3, Tony Farkas). It will be observable at 14.5-15 mag in an excellent condition from October to February. It may be visible visually, but it was not visible, fainter than 14.4 mag, on Oct. 5 (Seiichi Yoshida).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   5 30.18   32 50.3   1.563   2.519   161   14.6   0:54 (180, 22)  
Dec.  8   5 24.22   32 18.8   1.540   2.513   168   14.6   0:20 (180, 23)  

* 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 13.3 mag (Nov. 3, 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.  1   0 10.78  -12 35.4   1.890   2.395   108   14.7  20:41 (141, 62)  
Dec.  8   0 16.20  -11 43.9   1.985   2.410   103   14.8  20:49 (130, 57)  

* 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.  1   0 18.63  -46 55.6   3.010   3.194    91   14.9  20:41 ( 40, 73)  
Dec.  8   0 16.41  -47  9.0   3.060   3.150    86   14.9  20:49 ( 49, 68)  

* 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.  1  17 14.26  -61 32.8   3.871   3.189    40   15.0  20:41 ( 25, 18)  
Dec.  8  17 21.18  -62 30.1   3.880   3.190    40   15.0  20:49 ( 22, 16)  

* 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.  1  16 57.81   -0 23.4   6.501   5.604    22   15.2  20:41 ( 67,-28)  
Dec.  8  17  0.10   -0  7.6   6.499   5.602    22   15.1  20:49 ( 61,-35)  

* 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.  1  14 58.90  -40 12.7   3.525   2.675    26   15.2   2:56 (314,  8)  
Dec.  8  15 16.45  -41 38.2   3.504   2.678    28   15.2   2:53 (314, 10)  

* 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.  1  21 34.06  -35 36.6   1.540   1.474    67   15.5  20:41 ( 72, 45)  
Dec.  8  21 56.71  -32 13.5   1.557   1.465    65   15.3  20:49 ( 76, 41)  

* 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.  1  13 48.80  -34 17.3   3.154   2.435    36   15.3   2:56 (301, 16)  
Dec.  8  14  2.32  -36 13.4   3.165   2.491    39   15.4   2:53 (301, 19)  

* 50P/Arend

Now it is visible visually at 14.4 mag (Nov. 12, Alan Hale). 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.  1   1 53.70   45 48.0   1.076   1.943   140   15.4  21:14 (180,  9)  
Dec.  8   1 52.93   45 31.1   1.117   1.953   136   15.5  20:49 (179,  9)  

* C/2007 B2 ( Skiff )

Now it is 16.5 mag (Oct. 27, 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.  1  12 18.71   12 57.0   4.151   3.922    69   15.7   2:56 (249,  7)  
Dec.  8  12 24.40   12 12.9   4.014   3.880    75   15.6   2:53 (246, 11)  

* C/2006 W3 ( Christensen )

Now it is 16.4 mag (Oct. 3, Ken-ichi Kadota). 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.  1   5 32.19   63 23.6   5.342   6.099   136   15.7   0:57 (180, -8)  
Dec.  8   5 16.94   63 52.3   5.276   6.050   138   15.6   0:14 (180, -9)  

* 191P/2007 N1 ( McNaught )

It brightened rapidly, and now it reached up to 14.5 mag and became visible visually (Nov. 14, Alan Hale). It will be observable in good condition for a while after this. But it will be fading rapidly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   2 39.61    2 26.7   1.237   2.137   147   15.8  21:59 (180, 52)  
Dec.  8   2 37.73    3 11.9   1.294   2.152   141   15.9  21:30 (180, 52)  

* C/2006 K1 ( McNaught )

Now it is 16.6 mag (Sept. 20, 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 16 mag until winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   3  4.51  -25 55.1   3.878   4.558   128   16.0  22:24 (180, 81)  
Dec.  8   3  0.10  -24 44.1   3.937   4.571   124   16.1  21:52 (180, 80)  

* 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.  1  23 51.27    4 29.1   2.024   2.554   111   16.1  20:41 (147, 45)  
Dec.  8  23 55.36    5  9.7   2.106   2.553   105   16.2  20:49 (139, 41)  

* 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.  1   9 10.57  -23 36.4   1.477   1.878    97   16.6   2:56 (248, 66)  
Dec.  8   9 21.14  -25 31.1   1.413   1.856    99   16.4   2:53 (248, 70)  

* 70P/Kojima

Now it is 17.0 mag (Oct. 20, Catalina Sky Survey), 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.  1  11 34.65    5 47.0   2.058   2.063    76   16.5   2:56 (247, 20)  
Dec.  8  11 46.24    4 58.3   1.996   2.076    80   16.5   2:53 (245, 23)  

* 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.  1   5 17.93   23  8.1   3.082   4.052   167   16.6   0:42 (180, 32)  
Dec.  8   5 12.94   23 10.6   3.059   4.043   176   16.6   0:09 (180, 32)  

* 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.  1  14  4.65    1 31.4   7.517   6.811    41   16.7   2:56 (273, -7)  
Dec.  8  14  8.44    1  6.4   7.472   6.843    47   16.7   2:53 (271, -3)  

* C/2006 K3 ( McNaught )

Now it is 16.8 mag (Aug. 8, Ken-ichi Kadota). Before the perihelion passage, it kept 16.5-17 mag and hardly brightened. After the perihelion passage, it seems hardly to be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1   0 33.77   57 28.6   3.055   3.712   125   16.7  20:41 (174, -3)  
Dec.  8   0 21.83   56 28.2   3.167   3.762   120   16.8  20:49 (167, -4)  

* 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.  1   1 45.67    6 22.0   3.464   4.252   138   16.8  21:06 (180, 49)  
Dec.  8   1 43.59    6 24.3   3.557   4.266   130   16.9  20:49 (175, 48)  

* 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.  1   6 59.34    1 51.8   3.271   4.056   137   17.2   2:23 (180, 53)  
Dec.  8   6 46.98    2  0.1   3.164   4.020   146   17.0   1:43 (180, 53)  

* 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.  1   9 21.40   21 27.5   1.830   2.383   112   17.1   2:56 (209, 28)  
Dec.  8   9 25.78   22 32.4   1.772   2.403   118   17.1   2:53 (203, 29)  

* C/2006 M1 ( LINEAR )

Now it is 17.5 mag (Sept. 16, 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.  1   2 35.35   20 56.8   3.475   4.384   154   17.1  21:55 (180, 34)  
Dec.  8   2 32.78   19 38.4   3.564   4.419   146   17.2  21:25 (180, 35)  

* 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.  1   9  5.48   26 18.9   3.831   4.366   116   17.4   2:56 (203, 25)  
Dec.  8   9  5.09   26 40.7   3.726   4.353   123   17.3   2:53 (197, 26)  

* C/2007 W1 ( Boattini )

It will pass 0.7 A.U. from the sun in 2008 June, 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 early May, when the comet will be 7 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 7.5 mag in late June, then it keeps observable after that while the comet is fading gradually. In the Southern Hemipsphere, it keeps observable all the period, although it will be low in late May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  1  11 56.00   -1  2.4   3.372   3.153    68   17.6   2:56 (256, 20)  
Dec.  8  12  2.57   -1 57.3   3.189   3.068    74   17.4   2:53 (254, 25)  

* 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.  1   2 57.19   30  4.1   1.736   2.677   158   17.5  22:17 (180, 25)  
Dec.  8   2 53.31   29 55.3   1.769   2.677   151   17.5  21:45 (180, 25)  

* 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.  1   8 36.38   23 57.4   3.677   4.292   122   17.7   2:56 (197, 29)  
Dec.  8   8 36.48   25  0.4   3.573   4.274   129   17.6   2:53 (190, 29)  

* 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.  1   2 46.10    4 44.2   4.022   4.904   150   17.7  22:06 (180, 50)  
Dec.  8   2 42.65    4 47.5   4.089   4.913   143   17.7  21:35 (180, 50)  

* 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.  1  11  8.61   -2 18.6   8.975   8.845    79   17.7   2:56 (249, 30)  
Dec.  8  11 10.18   -2 19.0   8.864   8.850    85   17.7   2:53 (245, 35)  

* 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.  1   3 24.40   -5 13.3   3.209   4.087   149   17.8  22:44 (180, 60)  
Dec.  8   3 20.92   -4 57.0   3.250   4.087   143   17.8  22:13 (180, 60)  

* 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.  1  12 50.91   16 28.6   5.178   4.846    65   17.9   2:56 (251, -1)  
Dec.  8  12 52.97   15 53.9   5.036   4.806    70   17.8   2:53 (248,  4)  

* 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.  1  10 31.97   23 51.2   2.409   2.717    97   18.1   2:56 (223, 17)  
Dec.  8  10 39.33   24 10.9   2.305   2.700   102   17.9   2:53 (219, 20)  

* 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.  1   8  6.47   23  9.1   3.582   4.276   129   18.5   2:56 (189, 31)  
Dec.  8   8  5.29   23 34.7   3.499   4.271   136   18.5   2:53 (182, 31)  

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