Weekly Information about Bright Comets (2011 Sept. 24: South)

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Updated on September 25, 2011
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2009 P1 ( Garradd )

Now it is 6.7 mag (Sept. 19, Juan Jose Gonzalez). It keeps so bright as 6-8 mag for a long time from 2011 to 2012, and will be observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it keeps observable in good condition until October when it brightens up to 6.5 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  18 22.93   19 40.5   1.616   1.976    95    6.8  19:21 (160, 33)  
Oct.  1  18  9.00   19 23.1   1.697   1.921    86    6.8  19:27 (148, 29)  

* 45P/Honda-Mrkos-Pajdusakova

It passed very near by the earth, within 0.1 A.U., and brightened up to 8.0 mag in the southern sky (Aug. 14, Willian Souza). It appeared in the morning sky in the Northern Hemisphere. Now it is very bright as 6.6 mag (Sept. 24, Katsumi Yoshimoto). It keeps observable while fading gradually after this. In the Southern Hemisphere, it is not observable until winter when it becomes fainter than 16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  10  6.46    8 51.4   0.673   0.539    30    7.2   4:23 (259,  0)  
Oct.  1  10 26.67    8 27.2   0.827   0.532    32    7.5   4:12 (260,  0)  

* C/2010 X1 ( Elenin )

It has brightened faster than expected, and reached up to 8.1 mag in mid August (Aug. 19, Michael Mattiazzo). However, it turned to be fading and got diffuse rapidly after that. It has been already became fainter than 10.5 mag and unable to be detected (Sept. 14, Michael Mattiazzo). Altnough it was expected to be a naked eye comet, the nucleus is disintegrating and the comet will disappear soon. However, it is still detected by STEREO spacecraft images at 12-13 mag (Sept. 11, Alan Watson). It is not observable now. After appearing in the morning sky in October, it becomes observable in the excellent condition at midnight. However, the comet can be already too faint to see.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  12 28.01   -1 34.2   0.428   0.581     6   10.4  19:21 ( 79,-13)  
Oct.  1  11 49.65    4 18.3   0.328   0.684    11   10.4   4:12 (276,-15)  

* C/2010 G2 ( Hill )

Now it is 10.3 mag (Sept. 22, Syogo Utsunomiya). It will brighten up to 10-11 mag in autumn. In the Northern Hemisphere, it keeps observable for a long time until 2012 spring. In the Southern Hemisphere, it is not observable until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   7 47.50   52  0.9   2.022   1.998    74   10.6   4:23 (208, -7)  
Oct.  1   7 39.26   51  1.0   1.907   2.011    81   10.5   4:12 (205, -4)  

* C/2011 Q4 ( SWAN )

New comet discovered in the spacecraft images. Now it is so bright as 9.4 mag (Sept. 22, Chris Wyatt). In the Southern Hemisphere, it must have located high and been observable in excellent condition from spring to summer. It locates high still now. But it will be getting lower in the evening sky after this, and it will be unobservable in late September. In the Northern Hemisphere, it locates extremely low and hard to observe. It will appear in the morning sky at 15 mag in late November, then it will be observable while fading gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  14 17.03  -11 49.7   1.764   1.113    35   11.2  19:21 ( 87, 16)  
Oct.  1  14 18.50   -9 22.4   1.897   1.124    28   11.4  19:27 ( 84,  8)  

* 73P/Schwassmann-Wachmann 3

It brightened up to 15.0 mag on July 10 (Ken-ichi Kadota). The condition of this apparition is bad. In the Northern Hemisphere, it is only observable from December to February in the evening very low sky after the perihelion passage. In the Southern Hemisphere, it keeps observable for a long time, although it keeps locating extremely low. The component B was not detected, fainter than 20 mag, on May 14 (Hidetaka Sato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  13 50.61   -9 57.1   1.755   1.001    28   12.4  19:21 ( 84, 10)  
Oct.  1  14 17.62  -13 24.8   1.712   0.971    29   12.3  19:27 ( 80, 10)  

* 78P/Gehrels 2

Now it is very bright as 10.8 mag (Sept. 19, Juan Jose Gonzalez). It will be observable in good condition at 11-12 mag in autumn and winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  23 48.39    5  8.9   1.201   2.201   174   12.5  23:36 (180, 50)  
Oct.  1  23 44.38    4 15.1   1.187   2.179   169   12.3  23:04 (180, 51)  

* C/2011 M1 ( LINEAR )

Extremely diffuse. It is faint as 15.0 mag by CCD observations (Aug. 20, Michael Jager). The central part is extremely faint as 18 mag. However, it was reported so bright as 9.2 mag visually (Sept. 7, Juan Jose Gonzalez). In the Northern Hemisphere, it keeps observable until winter, although it becomes very low from mid August to late September. In the Southern Hemisphere, it is not observable until November. It will keep the current brightness until autumn in calculation. However, it may be disintegrated in the near future.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  11  9.93   23 47.9   1.719   0.944    27   12.9   4:23 (255,-21)  
Oct.  1  11 17.34   18 17.2   1.768   0.990    27   13.0   4:12 (259,-16)  

* C/2009 F4 ( McNaught )

Now it is so bright as 13.0 mag (Sept. 1, Hidetaka Sato). It keeps bright as 13-14 mag for a long time after this until 2013. It is not observable in the Northern Hemisphere, but it is observable in good condition in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  11 47.48  -75 56.4   5.663   5.503    75   13.5   4:23 (345, 30)  
Oct.  1  11 56.08  -76 35.8   5.691   5.497    73   13.5   4:12 (345, 30)  

* 213P/2009 B3 ( Van Ness )

First return of a new periodic comet which brightened up to 13 mag in a major outburst in 2005. Now it is bright as 11.0 mag (Sept. 19, Juan Jose Gonzalez). It will be observable in an excellent condition from summer to winter. The fragment B is also observed at 19-20 mag. Another fragments C and D are also observed at 21-22 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  22 44.84    4 26.4   1.270   2.240   160   13.5  22:32 (180, 51)  
Oct.  1  22 41.16    4 18.6   1.315   2.256   153   13.7  22:01 (180, 51)  

* 49P/Arend-Rigaux

It brightened rapidly and reached up to 13.5 mag (Sept. 14, Artyom Novichonok and Vladimir Gerke). It will be obserbale at 13-14 mag in good condition in autumn. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   7 39.70    8 36.5   1.537   1.451    65   14.0   4:23 (235, 28)  
Oct.  1   8  2.03    8 29.7   1.495   1.438    66   13.8   4:12 (236, 27)  

* C/2011 Q2 ( McNaught )

Now it is bright as 13.7 mag (Sept. 14, Hidetaka Sato). It is observable in good condition in the Southern Hemisphere. But it will be getting lower, and will be unobservable in early November. It will brighten up to 11-12 mag in winter, however, it is not observable around the perihelion passage. In the Northern Hemisphere, it is not observable until 2012 summer, when it will be fainter than 15 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  14 47.82  -35 39.7   2.598   2.139    52   14.1  19:21 ( 67, 33)  
Oct.  1  15  4.47  -35  5.0   2.589   2.069    48   13.9  19:27 ( 66, 30)  

* C/2011 A3 ( Gibbs )

Now it is 13.5 mag, much brighter than originally expected (Aug. 20, Michael Jager). It keeps 14 mag from 2011 summer to 2012 summer. But it is not observable around the perihelion. It is already too low to observe in the Southern Hemisphere. It will be unobservable also in the Northern Hemisphere in November. It was reported that it is very bright as 9.7 mag with a large coma of 6 arcmin visually (Sept. 19, Juan Jose Gonzalez). However, it looks very small by CCD images.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  14 57.82    3 16.0   3.142   2.521    44   14.0  19:21 (105, 16)  
Oct.  1  15 10.16    1 38.5   3.161   2.494    41   14.0  19:27 (101, 12)  

* C/2006 S3 ( LONEOS )

Now it is 13.7 mag and visible visually (Sept. 2, Jakub Cerny). It will be observable at 13-14 mag for a long time from 2011 to 2012. However, it will be unobservable temporarily from November to January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  18  1.71  -10 42.2   5.268   5.362    89   14.1  19:21 (134, 58)  
Oct.  1  17 58.96  -11  6.1   5.383   5.347    82   14.1  19:27 (122, 52)  

* (596) Scheila

Big asteroid discovered in 1906. It suddenly showed the cometary activity on Dec. 11, probably due to an impact of a small object. It was very bright as 11.5 mag visually (Dec. 17, Juan Jose Gonzalez). It had a dust coma still on Jan. 9 (Joseph Brimacombe). Then it turned to be stellar at 13.8 mag (Apr. 5, Juan Jose Gonzalez). Now it is not observable.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  12 28.08    7 37.0   3.629   2.647    10   14.2  19:21 ( 87,-17)  
Oct.  1  12 39.33    6 15.0   3.619   2.637     9   14.1  19:27 ( 82,-21)  

* 29P/Schwassmann-Wachmann 1

Now it is not observable. It will appear in the morning sky in early November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  11 45.64   -4 47.1   7.258   6.261     6   14.3   4:23 (285,-12)  
Oct.  1  11 50.40   -5 21.4   7.247   6.261     9   14.3   4:12 (283, -9)  

* 41P/Tuttle-Giacobini-Kresak

It will brighten up to 11 mag in autumn. However, it is not observable at all due to the bad condition in this apparition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  11  3.70    7  2.4   2.169   1.237    16   15.3   4:23 (269,-10)  
Oct.  1  11 29.40    4 54.3   2.119   1.192    16   14.3   4:12 (272,-11)  

* 71P/Clark

It brightened up to 17.1 mag in late June (June 24, J. F. Hernandez). It will brighten up to 13 mag in winter. But the condition of this apparition is bad, and it will not be observable around the perihelion passage. It will appear in the morning sky at 14 mag in 2012 April in the Southern Hemisphere. It will not be observable until 2012 June in the Northern Hemisphere, when the comet will be 15.5 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  13 42.30   -8 26.9   2.596   1.754    26   14.8  19:21 ( 84,  7)  
Oct.  1  13 58.87  -10 24.7   2.592   1.727    24   14.6  19:27 ( 80,  5)  

* C/2011 L3 ( McNaught )

It was very bright and visible visually as 12.4 mag in July and early August (Aug. 2, Jakub Koukal). Now it is fading, but still bright as 13.7 mag (Sept. 3, Jakub Cerny). In the Northern Hemisphere, it keeps observable at 14-15 mag in good condition until autumn. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  17 35.61   34 11.8   1.826   2.001    84   14.8  19:21 (155, 16)  
Oct.  1  17 32.20   34 12.0   1.936   2.026    80   15.1  19:27 (148, 12)  

* C/2010 S1 ( LINEAR )

Now it is visible visually at 13.6 mag (Sept. 3, Jakub Cerny). It is expected to be 13 mag and will be observable in good condition in 2013. In the Northern Hemisphere, it keeps observable for a long time after this. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   0 46.70   66  1.9   6.781   7.242   113   15.1   0:39 (180,-11)  
Oct.  1   0 32.83   65 54.2   6.705   7.215   116   15.0  23:52 (180,-11)  

* 27P/Crommelin

It has returned after 27-year blank since 1984. It brightened very rapidly, and became very bright as 9.1 mag (July 10, Tsutomu Seki). However, it is not observable now. It will never be observable again in this apparition. It is visible in SWAN images still on Sept. 17 (Hirohisa Sato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  11  4.89  -11 56.3   2.098   1.188    18   15.1   4:23 (284,  0)  
Oct.  1  11 26.58  -14 44.6   2.184   1.279    19   15.8   4:12 (287,  1)  

* 48P/Johnson

It brightened rapidly. Now it is bright and visible visually at 14.2 mag (Aug. 7, Alan Hale). It will be observable at 15 mag in good condition from July to October. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  20 19.20  -28 16.7   1.633   2.301   119   15.2  20:08 (180, 83)  
Oct.  1  20 24.01  -28 20.0   1.705   2.301   113   15.3  19:45 (180, 83)  

* C/2010 M1 ( Gibbs )

It was expected to keep 14-15 mag for a long time from 2011 summer to 2012 summer. However, it is lost. It was observed only during two days in 2010 June. So the orbital elements are extremely uncertain. The condition is good in the Southern Hemisphere. But in the Northern Hemisphere, it is not observable until 2012 August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  15 41.08  -54 24.9   2.931   2.759    70   15.2  19:21 ( 45, 46)  
Oct.  1  15 45.41  -55 12.3   2.972   2.718    65   15.2  19:27 ( 44, 42)  

* P/2010 JC81 ( WISE )

It was revealed to be a comet when appearing in the morning sky in early August. It has already passed the perihelion in April, and it will be fading after this. It was still bright as 13.5 mag and visible visually in early September (Sept. 7, Juan Jose Gonzalez). But it has already faded down to 15.8 mag (Sept. 17, Hidetaka Sato). In the Northern Hemisphere, it keeps observable in excellent condition for a long time until 2012 summer. It is not observable at all in the Southern Hemisphere. If the current brightness is temporal, it may fade out rapidly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   9 36.94   48  8.7   2.824   2.437    57   15.3   4:23 (223,-17)  
Oct.  1   9 54.88   48  0.3   2.816   2.485    60   15.4   4:12 (223,-17)  

* 62P/Tsuchinshan 1

It is not observable at all due to the bad condition in this apparition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  12  5.52    6  1.1   2.666   1.672     6   15.3  19:21 ( 82,-21)  
Oct.  1  12 23.29    4 10.2   2.703   1.714     7   15.7   4:12 (280,-22)  

* 37P/Forbes

Now it is 17.5 mag (Aug. 17, K. Hills). It is already unobservable in the Northern Hemisphere. It is getting lower in the evening sky, and will be too low to observe in late October also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  14 16.87  -20 20.5   2.421   1.755    38   15.8  19:21 ( 79, 21)  
Oct.  1  14 35.22  -21 33.2   2.427   1.726    36   15.7  19:27 ( 76, 18)  

* C/2009 Y1 ( Catalina )

Now it is bright at 13.8 mag and visible visually (Sept. 2, Jakub Cerny). It will be fading slowly after this, and it will be fainter than 18 mag in December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  22 22.57  -27  0.9   2.679   3.539   143   15.7  22:10 (180, 82)  
Oct.  1  22 14.49  -28 47.5   2.807   3.587   135   15.9  21:35 (180, 84)  

* 130P/McNaught-Hughes

Now it is bright and visible visually at 14.5 mag (Aug. 29, Jakub Cerny). Brighter than originally predicted. It will be observable at 14-15 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  22 58.00  -20 16.6   1.259   2.207   154   16.0  22:46 (180, 75)  
Oct.  1  22 55.36  -20 11.9   1.311   2.223   147   16.2  22:16 (180, 75)  

* 21P/Giacobini-Zinner

Now it is 16.3 mag (Sept. 13, Artyom Novichonok and Vladimir Gerke). It will reach up to 10 mag from January to March, but it will be too low to observe. It will be getting lower in the evening sky. In the Northern Hemisphere, it keeps observable until December when it brightens up to 12 mag. In the Southern Hemisphere, it is observable only until October when it becomes 15 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  15 57.45    5 43.2   2.368   2.044    59   16.3  19:21 (118, 25)  
Oct.  1  16  7.84    4 40.5   2.364   1.980    55   16.1  19:27 (112, 22)  

* C/2011 R1 ( McNaught )

Now it is 16.3 mag (Sept. 4, Siding Spring Survey). It is expected to be observable at 13 mag for a long time from 2012 summer to 2013 summer. It will be observable in excellent condition in the Southern Hemisphere. But it is not observable at brightest time in the Northern Hemisphere. It keeps observable for a while at 16 mag while brightening gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   2 52.52  -20 10.3   3.942   4.690   133   16.2   2:44 (180, 75)  
Oct.  1   2 47.14  -22  0.4   3.842   4.631   137   16.1   2:11 (180, 77)  

* 65P/Gunn

It became bright as 12 mag in 2010. Now it is fading. It has already faded down to 16.3 mag (Sept. 11, Artyom Novichonok and Vladimir Gerke).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   2 12.78    3 16.3   2.921   3.803   147   16.1   2:04 (180, 52)  
Oct.  1   2  8.77    2 55.1   2.893   3.822   154   16.1   1:33 (180, 52)  

* C/2008 FK75 ( Lemmon-Siding Spring )

Now it is 15.8 mag (Aug. 16, Artyom Novichonok). It will be fading very slowly after this. In the Northern Hemisphere, it keeps observable for a long time until 2012 spring when it fades down to 17-18 mag. It will not be observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  22 30.59   49 47.8   4.687   5.347   126   16.1  22:18 (180,  5)  
Oct.  1  22 28.41   48 44.6   4.706   5.376   127   16.2  21:49 (180,  6)  

* C/2010 B1 ( Cardinal )

It reached up to 14 mag in 2010 autumn and winter. Now it is fading. It has already faded down to 16.6 mag (Sept. 14, Hidetaka Sato). In the Southern Hemisphere, it keeps observable in good condition while fading gradually. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   6 35.79  -60 12.0   3.639   3.700    85   16.3   4:23 (331, 58)  
Oct.  1   6 35.26  -63 19.0   3.667   3.741    86   16.3   4:12 (338, 57)  

* 174P/(60558) 2000 EC98 ( Echeclus )

It has brightened in outburst up to 14 mag in 2006 January. Another outburst occured in late May, and brightened up to 14.3 mag (June 4, Juan Jose Gonzalez). It was bright as 14.5 mag still on June 27 (Jakub Koukal). Recent brightness has not been reported. It will be getting lower in the evening sky after this, and will be unobservable in October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  16 11.32  -16 59.4   8.603   8.207    63   16.5  19:21 ( 99, 42)  
Oct.  1  16 14.06  -17  9.1   8.683   8.188    57   16.6  19:27 ( 93, 36)  

* 115P/Maury

Now it is 16.0 mag (Aug. 19, J. F. Hernandez). It is visible visually at 15.0 mag (Aug. 23, Jakub Cerny). It will brighten up to 16 mag from summer to autumn, and will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  17 27.95  -11 57.3   1.924   2.038    81   16.6  19:21 (122, 54)  
Oct.  1  17 41.37  -12 45.0   1.988   2.036    78   16.6  19:27 (115, 51)  

* C/2011 O1 ( LINEAR )

Now it is 16.5 mag (Aug. 1, Hidetaka Sato). In the Southern Hemisphere, it keeps observable at 16-17 mag for a long time from 2011 to 2013. In the Northern Hemisphere, it is only observable until October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  17  8.41  -23 35.4   4.913   4.801    77   16.8  19:21 (100, 57)  
Oct.  1  17 10.28  -24 23.7   4.992   4.767    71   16.8  19:27 ( 93, 51)  

* C/2008 S3 ( Boattini )

Now it is 16.6 mag (Aug. 29, Artyom Novichonok). It keeps observable at 17 mag for a long time from 2011 to 2012.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   0 17.29   17 22.7   7.083   8.045   162   16.8   0:09 (180, 38)  
Oct.  1   0 11.57   16 54.0   7.075   8.049   165   16.8  23:31 (180, 38)  

* 164P/Christensen

Now it is 17.0 mag (Sept. 22, C. Rinner, F. Kugel). It tends to be brightest after the perihelion passage. In the Northern Hemisphere, it keeps observable at 17 mag in good condition from autumn to winter. In the Southern Hemisphere, it locates low and will be hard to observe.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   9  5.14   21 48.3   2.514   1.992    48   17.3   4:23 (240,  4)  
Oct.  1   9 20.16   21 27.7   2.488   2.027    51   17.3   4:12 (240,  5)  

* P/2011 N1 ( ASH )

Now it is 17.3 mag (Aug. 22, J. L. Ortiz, N. Morales, I. de la Cueva). It keeps 17-18 mag until early 2013. It keeps observable in good condition until early 2012 in the Southern Hemisphere, although it locates low in the Northern Hemisphere. In the Northern Hemisphere, it will be observable in good condition from 2012 autumn to early 2013.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   1  2.82  -46 59.9   2.648   3.392   130   17.4   0:55 (  0, 78)  
Oct.  1   0 56.99  -47 11.8   2.639   3.366   129   17.4   0:21 (  0, 78)  

* P/2011 R2 ( PanSTARRS )

Now it is 17.1 mag (Sept. 8, P. Dupouy). It will be observable at 17.5 mag in good condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  23 20.81   -8 48.8   1.114   2.102   166   17.5  23:08 (180, 64)  
Oct.  1  23 17.59   -9 29.5   1.126   2.091   158   17.5  22:38 (180, 64)  

* 242P/2010 P3 ( Spahr )

Now it is 18.3 mag (Aug. 31, W. Hasubick). It will be observable in good condition at 18 mag from autumn to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   3 30.74   -6 53.9   3.386   4.074   127   17.8   3:22 (180, 62)  
Oct.  1   3 30.17   -8  0.0   3.318   4.068   133   17.8   2:54 (180, 63)  

* 2000 EJ37

Peculiar asteroid moving along a cometary orbit. Now it is 17.5 mag (Aug. 1, Siding Spring Survey)。It is observable at 17-18 mag in good condition from September to November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   3 12.27   10 35.6   1.808   2.584   131   17.8   3:04 (180, 44)  
Oct.  1   3  8.59    9 46.4   1.798   2.639   139   17.8   2:32 (180, 45)  

* 244P/2010 Q1 ( Scotti )

It keeps observable at 18 mag for a long time until 2013. No observations have been reported since 2011 February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   5 37.90   25 40.2   3.721   3.945    95   17.9   4:23 (197, 27)  
Oct.  1   5 41.01   25 46.2   3.617   3.942   101   17.8   4:12 (193, 28)  

* 9P/Tempel 1

Although the condition is bad in this apparition, it brightened up to 12.8 mag in last winter (Dec. 24, Ken-ichi Kadota). Now it is fading, but it is still bright as 16.7 mag (Sept. 22, P. Dupouy). It can be observable at 17-18 mag for some more time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24  23 51.42  -18 27.8   1.707   2.676   161   17.8  23:39 (180, 73)  
Oct.  1  23 44.89  -18 39.2   1.769   2.715   156   18.1  23:05 (180, 74)  

* 2010 GM163

Peculiar asteroid moving along a cometary orbit. It will pass the perihelion in winter. But it will never be brighter than 18 mag. It becomes observable in good condition in September in the Southern Hemisphere. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.24   0 11.60  -37 40.5   2.376   3.227   142   17.9   0:03 (  0, 87)  
Oct.  1   0  7.72  -38  5.5   2.395   3.216   138   18.0  23:28 (  0, 87)  

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