Weekly Information about Bright Comets (2007 Nov. 3: North)

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 Updated on November 7, 2007
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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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* 17P/Holmes

Surprisingly, a great outburst occured on Oct. 24, and it bacame a naked eye comet of 2 mag. It still keeps so bright as 2.5 mag on Nov. 6. It was completely stellar just after the outburst, however, then a round disk like coma is getting larger gradually. The bright disk like coma exceeds 15 arcmin size, surrounded with an outer faint gas coma larger than Moon. 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)  
Nov.  3   3 43.93   50 35.6   1.621   2.474   141    2.9   0:58 (180, 74)  
Nov. 10   3 35.68   50 36.7   1.622   2.502   145    3.4   0:23 (180, 74)

* C/2007 F1 ( LONEOS )

Already unobservable in the Northern Hemisphere, but it is appearing 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 6.7 mag (Nov. 6, Michael Mattiazzo). It seems to be fading much faster than this ephemeris. 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)  
Nov.  3  16  8.31  -21 53.6   0.775   0.427    24    4.4  18:30 ( 64, -3)  
Nov. 10  16 45.63  -36 39.9   0.957   0.518    30    5.7  18:25 ( 51, -9)

* 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 will be unobservable for 1 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)  
Nov.  3  17  8.91  -24 55.5   1.787   1.183    38   10.5  18:30 ( 54,  6)  
Nov. 10  17  7.91  -28 40.8   1.830   1.120    31   10.3  18:25 ( 54, -1)

* 8P/Tuttle

It will reach to 6 mag in January, and will be observable in good condition. Now it is 13.1 mag (Nov. 3, Seiichi Yoshida), already visible visually. It will brighten very rapidly after this. 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)  
Nov.  3  15 11.71   85 53.9   1.087   1.603   100   12.3  18:30 (175, 35)  
Nov. 10  16  4.54   85 27.0   0.974   1.533   102   11.7  18:25 (174, 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). It had been unobservable for a while. But in the Southern Hemisphere, it will appear in the morning sky in late October at 13 mag, then it keeps observable while fading gradually. In the Northern Hemisphere, it will appear again at 14 mag in the very low sky at dawn in mid November. But it will be fading while keeping extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  12 14.61  -33  1.7   2.397   1.694    35   13.1   4:56 (309, -3)  
Nov. 10  12 10.34  -34 58.0   2.394   1.778    41   13.4   5:02 (316,  1)

* C/2006 Q1 ( McNaught )

It was 14.1 mag on Oct. 1 (S. G. McAndrew), 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)  
Nov.  3   9 14.87  -40 12.3   3.876   3.695    72   13.4   4:56 (342, 12)  
Nov. 10   9 21.94  -41 28.7   3.787   3.650    74   13.3   5:02 (348, 12)

* 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)  
Nov.  3   0 26.64   24 49.0   0.837   1.764   149   13.5  21:37 (  0, 80)  
Nov. 10   0 24.72   25 12.8   0.850   1.747   143   13.4  21:07 (  0, 80)

* 29P/Schwassmann-Wachmann 1

Now it is faint as 14.2 mag (Nov. 3, 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)  
Nov.  3   6 29.85   30 35.6   5.360   5.963   123   13.5   3:43 (  0, 86)  
Nov. 10   6 28.53   30 40.1   5.274   5.965   130   13.4   3:14 (  0, 86)

* 46P/Wirtanen

Now it is 13.7 mag (Nov. 3, Seiichi Yoshida), already bright and visible visually. It will brighten rapidly after this. 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)  
Nov.  3  21 51.51  -31 14.8   1.077   1.571    98   14.2  19:03 (  0, 24)  
Nov. 10  21 56.79  -29 50.2   1.082   1.513    93   13.8  18:40 (  0, 25)

* 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)  
Nov.  3  21 13.79   -6 57.7   3.837   4.104    98   14.1  18:30 (  2, 48)  
Nov. 10  21 15.30   -6 36.1   3.892   4.050    92   14.0  18:25 ( 10, 48)

* P/2007 H1 ( McNaught )

Now it is bright and visible visually at 13.3 mag (Nov. 3, Seiichi Yoshida). It is observable in very good condition at 13 mag for a while in this autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  23 59.10  -14 38.7   1.558   2.344   132   14.1  21:10 (  0, 40)  
Nov. 10   0  0.36  -14 23.0   1.632   2.355   126   14.2  20:43 (  0, 41)

* 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)  
Nov.  3   7 40.27   23 32.4   2.190   2.658   107   14.4   4:53 (  0, 79)  
Nov. 10   7 46.30   22 52.7   2.103   2.649   112   14.3   4:32 (  0, 78)

* C/2006 XA1 ( LINEAR )

It reached to 13.2 mag in last spring (May 12, Carlos Labordena). But now it is not observable. In the Southen Hemisphere, it will be observable again at 15 mag in November. But in the Northern Hemisphere, it will never observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  12 53.10  -25 42.0   3.082   2.225    25   14.7   4:56 (298, -5)  
Nov. 10  13  7.22  -27 58.5   3.103   2.275    27   14.8   5:02 (302, -3)

* 110P/Hartley 3

It brightened very rapidly in a short time, and now it reached to 15.5 mag (Oct. 1, J. Maria Ruiz M). 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)  
Nov.  3   5 43.17   33 48.9   1.771   2.551   132   14.8   2:57 (  0, 89)  
Nov. 10   5 42.05   33 43.0   1.704   2.542   139   14.8   2:28 (  0, 89)

* 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)  
Nov.  3  16 53.91  -58 46.1   3.724   3.199    51   14.9  18:30 ( 30,-19)  
Nov. 10  16 57.79  -59 18.7   3.777   3.194    47   14.9  18:25 ( 31,-21)

* 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 will be lower than 10 degree in November. Then 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)  
Nov.  3   0 40.04  -43 58.5   2.823   3.378   115   15.0  21:50 (  0, 11)  
Nov. 10   0 33.13  -45  5.2   2.864   3.331   109   15.0  21:15 (  0, 10)

* C/2005 L3 ( McNaught )

Now it is bright and visible visually at 14.1 mag (Oct. 5, Seiichi Yoshida). It had been observable in good conditoin for a long time since spring, but it will be getting lower and lower after this, and will be unobservable in November. 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)  
Nov.  3  16 49.78   -1  0.8   6.380   5.620    37   15.1  18:30 ( 76, 18)  
Nov. 10  16 51.52   -0 54.8   6.430   5.615    32   15.1  18:25 ( 79, 14)

* 50P/Arend

Now it is 15.5 mag (Oct. 1, J. Maria Ruiz M). It keeps observable in good condition until it fades out in 2008 spring. It may be visible visually, but it was not visible, fainter than 14.3 mag, on Oct. 6 (Seiichi Yoshida). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3   2 16.64   44 27.7   0.999   1.924   150   15.2  23:26 (180, 80)  
Nov. 10   2  8.96   45 18.1   1.004   1.926   149   15.2  22:51 (180, 80)

* C/2006 V1 ( Catalina )

It was observed at 16 mag in 2007 spring and summer. Now it is not observable. In the Southern Hemisphere, it will appear again at 16 mag in winter, then it keeps 16 mag and observable in good condition 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)  
Nov.  3  13 54.12  -33 49.9   3.591   2.686    20   15.3   4:56 (298,-21)  
Nov. 10  14  9.50  -35 30.3   3.577   2.681    21   15.2   5:02 (301,-18)

* C/2007 G1 ( LINEAR )

Now it is 16.5 mag (Sept. 16, Ken-ichi Kadota). It will reach to 12 mag in 2008 summer. In the Northern Hemisphere, it keeps observable almost all time until that while the comet is brightening gradually. However, it goes to the southern sky and will never be observable again in the Northern Hemisphere after that. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  16 51.41    9 39.5   5.287   4.606    42   15.7  18:30 ( 85, 24)  
Nov. 10  16 55.67    8 29.9   5.287   4.554    38   15.7  18:25 ( 86, 20)

* (3200) Phaethon

It keeps observable in good condition in the morning sky while it brightens rapidly. It will reach to 13 mag in early December, and will be visible 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)  
Nov.  3   7 42.38   31 37.5   0.810   1.461   107   16.3   4:55 (  0, 87)  
Nov. 10   7 57.65   31 15.1   0.660   1.376   111   15.7   4:43 (  0, 86)

* 188P/2007 J7 ( LINEAR-Mueller )

First return of a new periodic comet discovered in 1998 at 14 mag. Now it is 14.4 mag (Oct. 6, Seiichi Yoshida), visible visually. It keeps observable at 15 mag in good condition until December. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  23 46.64    2 38.7   1.747   2.570   137   15.8  20:57 (  0, 58)  
Nov. 10  23 45.93    2 58.3   1.806   2.564   130   15.9  20:29 (  0, 58)

* 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)  
Nov.  3   6 17.39   60  3.9   5.748   6.291   119   16.0   3:31 (180, 65)  
Nov. 10   6  8.77   61  2.2   5.628   6.243   124   15.9   2:55 (180, 64)

* 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)  
Nov.  3   3 25.86  -29 10.4   3.762   4.509   134   15.9   0:40 (  0, 26)  
Nov. 10   3 20.29  -28 36.2   3.774   4.520   134   15.9   0:07 (  0, 26)

* C/2007 B2 ( Skiff )

Although it has been unobservable for a while, now it is appering in the morning sky. It must be already bright as 16.5 mag. 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)  
Nov.  3  11 53.11   16 12.2   4.663   4.093    49   16.2   4:56 (272, 32)  
Nov. 10  11 59.87   15 20.7   4.542   4.049    54   16.1   5:02 (277, 37)

* 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)  
Nov.  3   1 52.58   59 34.5   2.744   3.513   134   16.3  23:01 (180, 65)  
Nov. 10   1 28.92   59 33.7   2.798   3.562   134   16.4  22:10 (180, 65)

* 191P/2007 N1 ( McNaught )

Now it is 16.6 mag (Oct. 5, Yasukazu Ikari). It keeps 16 mag until November. Then it keeps observable in good condition until January when it becomes fainter than 18 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3   2 56.71    1  3.0   1.112   2.086   164   16.4   0:11 (  0, 56)  
Nov. 10   2 51.65    1  8.2   1.126   2.097   164   16.5  23:34 (  0, 56)

* 70P/Kojima

Although it had been unobservable for a long time, now it is appearing in the morning and getting higher gradually. It must be already bright as 16.5 mag. 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)  
Nov.  3  10 42.44    9 40.6   2.298   2.025    61   16.6   4:56 (291, 42)  
Nov. 10  10 56.27    8 38.1   2.240   2.032    65   16.6   5:02 (296, 45)

* 74P/Smirnova-Chernykh

It will reach to 15 mag in 2009 and 2010. Although LINEAR reported it as 19 mag in mid September, 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)  
Nov.  3   5 32.76   22 51.3   3.311   4.087   136   16.8   2:46 (  0, 78)  
Nov. 10   5 30.12   22 56.3   3.235   4.078   143   16.8   2:16 (  0, 78)

* 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 next winter. It is expected to reach to 16 mag. However, Mt. Lemmon Survey reported it so faint as 19 mag in September and October. 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)  
Nov.  3   8  3.05   21 57.7   3.984   4.297   101   16.8   4:56 (340, 76)  
Nov. 10   8  5.09   22 10.7   3.876   4.292   108   16.8   4:51 (  0, 77)

* 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)  
Nov.  3   8 23.15  -15 20.3   1.766   1.993    87   17.0   4:56 (348, 39)  
Nov. 10   8 35.63  -17 25.8   1.689   1.961    90   16.9   5:02 (354, 37)

* 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)  
Nov.  3   2 50.81   26 37.2   3.274   4.248   167   16.9   0:05 (  0, 82)  
Nov. 10   2 46.42   25 11.5   3.299   4.281   171   17.0  23:29 (  0, 80)

* C/2005 S4 ( McNaught )

Now it is 17.4 mag (Sept. 16, Ken-ichi Kadota). It will be observable at 17 mag for a long time until 2008 autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3  19  7.90   15 55.0   6.077   5.900    75   17.1  18:30 ( 65, 55)  
Nov. 10  19  8.47   15 51.4   6.175   5.906    69   17.2  18:25 ( 71, 51)

* C/2007 E1 ( Garradd )

It passed near by the earth in early April, and reached to 8.7 mag (Apr. 10, Werner hasubick). Then it faded down to 11.8 mag on May 26 (Seiichi Yoshida), and became too low to observe in the evening. It has already faded down to 17.4 mag (Oct. 5, Yasukazu Ikari). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3   4  5.94   29 41.1   1.660   2.586   153   17.3   1:21 (  0, 85)  
Nov. 10   3 35.71   28 17.4   1.689   2.660   165   17.5   0:24 (  0, 83)

* 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)  
Nov.  3   3  3.04    5  4.6   3.893   4.866   167   17.6   0:17 (  0, 60)  
Nov. 10   2 58.60    4 55.1   3.903   4.876   167   17.6  23:41 (  0, 60)

* 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)  
Nov.  3   8 58.98   25 28.2   4.298   4.413    90   17.7   4:56 (295, 71)  
Nov. 10   9  1.72   25 35.4   4.177   4.402    96   17.6   5:02 (311, 76)

* 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 it is still bright as 16.4 mag (Oct. 6, Ken-ichi Kadota), brighter than this ephemeris. It locates in the good position in this winter, so it will be observable at 17 mag for some more time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  3   2  0.21    6 51.4   3.215   4.194   169   17.7  23:10 (  0, 62)  
Nov. 10   1 55.85    6 39.1   3.257   4.208   161   17.8  22:38 (  0, 62)

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