Weekly Information about Bright Comets (2015 May 9: North)

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Updated on May 9, 2015
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2015 G2 ( MASTER )

Now it is so bright as 6.8 mag (May 6, Chris Wyatt). In the Southern Hemisphere, it keeps observable in good condition until late June. In the Northern Hemisphere, it keeps unobservable until September when the comet will be fainter than 13 mag. It must have been observable at 16 mag in good condition in 2014 autumn, but it was not discovered.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 44.88  -34 48.5   0.502   0.831    55    6.2   3:26 (293,-32)  
May  16   4 33.00  -29  5.0   0.489   0.794    50    5.9  20:35 ( 76,-33)  

* C/2014 Q2 ( Lovejoy )

It brightened up to 3.7 mag and became a naked eye comet in mid January (Jan. 13, Marek Biely). Now it is fading. But it is bright as 7.5 mag still now (May 8, Neil Norman). In the Northern Hemisphere, it keeps observable all night until July when the comet will fade down to 13 mag. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 27.51   80 19.0   2.145   1.929    64    8.5   3:26 (191, 32)  
May  16   1 21.76   83 22.7   2.196   2.000    65    8.9   3:17 (188, 34)  

* 88P/Howell

Now it is bright as 9.8 mag (May 6, Chris Wyatt). In the Southern Hemisphere, it keeps observable in good condition for a long time until the comet fades out. In the Northern Hemisphere, it keeps extremely low and hard to observe until June. It will be observable in good condition after June while the comet will be fading gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23 41.29   -5 51.9   1.725   1.406    54    8.8   3:26 (282,  7)  
May  16   0  0.71   -3 52.8   1.719   1.427    56    8.9   3:17 (280,  8)  

* C/2014 Q1 ( PanSTARRS )

Now it is 12.5 mag (Apr. 30, Michael Mattiazzo). It will approach to the sun down to 0.3 a.u. in July, and it is expected to brighten up to 3 mag. In the Southern Hemisphere, it is observable in the extremely low sky until early June. Then it becomes unobservable temporarily, but it will be observable after mid July, and keeps observable while the comet will be fading gradually. It will not be observable after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 28.87    7 39.7   2.265   1.410    24   10.8   3:26 (255, -7)  
May  16   1 46.61   10 44.9   2.111   1.282    26   10.2   3:17 (253, -5)  

* 19P/Borrelly

It brightened up to 12.8 mag until March (Mar. 21, Michael Mattiazzo). It will brighten up to 10.5 mag in May and June, but it is not observable. In the Northern Hemisphere, it will be observable after autumn while the comet will be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   3 26.69   12 10.5   2.362   1.369     7   10.8  20:27 (119,-17)  
May  16   3 47.85   15  0.7   2.359   1.357     5   10.7  20:35 (124,-18)  

* C/2013 US10 ( Catalina )

Now it is 11.9 mag (May 6, Chris Wyatt). It is expected to brighten up to 4 mag from autumn to winter. But it is fainter than this ephemeris recently. It keeps observable in excellent condition until autumn in the Southern Hemisphere. In the Northern Hemisphere, it is hardly observable until December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23 38.43  -22 46.7   3.344   3.035    63   10.9   3:26 (296, -3)  
May  16  23 42.70  -23 26.2   3.148   2.951    69   10.7   3:17 (298, -1)  

* 6P/d'Arrest

It will brighten up to 11 mag in April and May. But the condition is bad in this apparition. In the Southern Hemisphere, it is getting higher gradually in the morning sky. It will not be observable until late July in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 31.99   -0 13.3   2.377   1.561    28   11.5   3:26 (261,-13)  
May  16   1 51.19    0 49.0   2.392   1.599    30   11.6   3:17 (260,-12)  

* C/2015 F3 ( SWAN )

It brightened up to 9.5 mag from March to April (Apr. 7, Juan Jose Gonzalez). Now it is fading and getting diffuse rapidly. It has already faded down to 12.5 mag (May 7, Danil Sidorko). It seems to be a fragment of Comets C/1988 A1 (Liller) and C/1996 Q1 (Tabur). It will be fading after this, but it is observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  11  3.95   74 12.9   1.084   1.364    81   12.0  20:27 (177, 51)  
May  16  11 25.37   63 55.6   1.142   1.456    84   12.4  20:35 (170, 61)  

* C/2012 F3 ( PanSTARRS )

Now it is 14.9 mag (Apr. 1, Taras Prystavski). In 2015, it keeps 13-14 mag and will be observable in good condition for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  19 24.43   -9 13.6   2.909   3.470   115   13.2   3:26 (341, 44)  
May  16  19 26.59   -8 55.5   2.836   3.476   121   13.2   3:17 (347, 45)  

* 22P/Kopff

Now it is 13.0 mag and visible visually (May 7, J.P.Navarro Pina). It will brighten up to 11 mag in 2015 autumn. In this apparition, it is observable until the highlight while the comet is brightening.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  12 24.82    5 27.0   1.404   2.236   135   13.4  21:17 (  0, 60)  
May  16  12 22.15    5 31.1   1.423   2.194   127   13.2  20:47 (  0, 60)  

* 29P/Schwassmann-Wachmann 1

Outburst occured on May 6. Now it is bright as 11.8 mag (May 8, Chris Wyatt).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  17 54.34  -31 43.9   5.254   6.045   138   13.5   2:50 (  0, 23)  
May  16  17 52.00  -31 46.7   5.184   6.043   145   13.4   2:20 (  0, 23)  

* C/2015 F5 ( SWAN-Xingming )

It brightened up to 8.2 mag in April (Apr. 8, Juan Jose Gonzalez). Now it is fading. It has already faded down to 12.0 mag (May 7, J.P.Navarro Pina). In the Northern Hemisphere, it keeps locating high in the evening sky in May, but it will fade out rapidly after this. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   7  1.17   44 28.3   1.215   1.072    56   13.7  20:27 (122, 39)  
May  16   7 27.47   41 11.7   1.452   1.202    54   14.6  20:35 (119, 36)  

* C/2015 C2 ( SWAN )

It brightened up to 9.2 mag in March (Mar. 9, Juan Jose Gonzalez). Now it is fading, but it is bright as 11.0 mag still now (May 1, Seiichi Yoshida). In the Northern Hemisphere, it will be getting higher gradually after this. It is not observable after this in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 42.80   51 40.3   2.071   1.417    37   14.2   3:26 (218, 17)  
May  16   1 48.61   56 20.1   2.112   1.518    41   14.7   3:17 (215, 21)  

* C/2014 W11 ( PanSTARRS )

It brightened very rapidly. Now it is so bright as 14.6 mag and visible visually (Apr. 12, Sandor Szabo). It keeps 14-15 mag for a while after this. In the Northern Hemisphere, it will be getting lower gradually after May, and will be unobservable in mid June. In the Southern Hemisphere, it will be getting lower gradually after June, and will be unobservable in early August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   9  3.61    8 25.0   3.324   3.440    88   14.3  20:27 ( 61, 46)  
May  16   9  9.15    7 58.6   3.413   3.435    82   14.3  20:35 ( 68, 41)  

* C/2015 F4 ( Jacques )

Now it is 15.5 mag (Apr. 15, J. Oey, P. Camilleri, H. Williams). It is expected to brighten up to 12 mag from July to August. In the Southern Hemisphere, it keeps observable in good condition until summer. In the Northern Hemisphere, it will be getting higher gradually after May, and will be observable in good condition after summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  20 44.35  -35  5.5   1.569   2.050   103   14.6   3:26 (332, 13)  
May  16  20 50.08  -32 32.1   1.440   1.999   108   14.3   3:17 (334, 17)  

* C/2012 K1 ( PanSTARRS )

It brightened up to 6.9 mag in 2014 autumn (Oct. 17, Marco Goiato). Now it is fading. But it is bright as 12.6 mag still now (Feb. 9, Chris Wyatt). In the Southern Hemisphere, it had been unobservable temporarily for a while, but it will be observable in good condition again after this. It will be observable again in mid June also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   0 51.69  -16 39.7   4.271   3.651    46   14.6   3:26 (281,-14)  
May  16   0 53.40  -16 41.1   4.258   3.726    52   14.7   3:17 (283,-10)  

* 67P/Churyumov-Gerasimenko

Now it is 16.4 mag (Apr. 22, Jean-Francois Soulier). It will brighten up to 11 mag from August to October. In the Northern Hemisphere, it will be getting higher gradually after July, then it keeps observable in good condition. In the Southern Hemisphere, it keeps low until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   0 53.85    1 15.2   2.401   1.681    35   15.0   3:26 (266, -4)  
May  16   1 12.62    3 22.6   2.324   1.630    36   14.7   3:17 (264, -3)  

* C/2011 KP36 ( Spacewatch )

Now it is 15.3 mag (Mar. 28, Taras Prystavski). Distant object, but it keeps observable at 14-15 mag for a long time from 2015 to 2016.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21 22.98   -1 48.9   5.595   5.606    85   15.2   3:26 (303, 35)  
May  16  21 25.66   -1 30.2   5.467   5.582    91   15.2   3:17 (307, 38)  

* C/2013 C2 ( Tenagra )

Very far object. However, outburst occured on Feb. 20, and it brightened up to 15 mag. It is bright as 15.8 mag still now (Mar. 28, Ken-ichi Kadota). It is reported so bright visually as 12.5 mag (Mar. 22, Marco Goiato). It locates high in the Southern Hemisphere. But it locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  12  1.96  -21 16.0   8.371   9.141   137   15.2  20:54 (  0, 34)  
May  16  12  1.25  -20 55.7   8.440   9.140   131   15.2  20:35 (  3, 34)  

* 7P/Pons-Winnecke

It must have brightened up to 11 mag from January to February, but no observations have been reported. Now it is 16.7 mag (Apr. 27, Hidetaka Sato). In the Southern Hemisphere, it is observable in the morning sky after this while the comet will be fading. In the Northern Hemisphere, it will be getting higher after July, but the comet will be faitner than 17 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   0 34.65  -12 51.3   2.211   1.694    47   15.3   3:26 (280, -8)  
May  16   0 50.74  -12  2.3   2.218   1.745    49   15.5   3:17 (280, -7)  

* 205P/Giacobini

Now it is 17.1 mag (Apr. 27, Hidetaka Sato). First return of a comet re-discovered after 112-year blank in 2008. It brightened up to 12 mag in 2008. In this apparition, it was expected to brighten up to 15 mag from spring to summer, but it is fainter than predicted. It keeps locating low in the morning sky for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23 53.02    5 19.7   2.026   1.538    47   15.3   3:26 (271, 11)  
May  16   0 13.37    6 43.2   1.996   1.537    49   15.3   3:17 (270, 11)  

* C/2014 N3 ( NEOWISE )

Now it is 15.3 mag (Jan. 7, Taras Prystavski). It keeps 15 mag for a long time from 2014 to 2015. It is observable in excellent condition in 2014 in the Southern Hemisphere, or in 2015 in the Northern Hemisphere. It becomes unobservable temporarily from March to May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1 36.29   12 58.2   4.839   3.914    21   15.3   3:26 (250, -6)  
May  16   1 41.77   14 28.6   4.805   3.922    26   15.3   3:17 (251, -2)  

* C/2014 A4 ( SONEAR )

Now it is 15.8 mag (Feb. 22, Taras Prystavski). It will brighten up to 14 mag from 2015 to 2016. In the Southern Hemisphere, it becomes unobservable temporarily from April to May, but it will be observable in good condition again after June. It will be observable in good condition after July also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   3  0.77    1  0.4   5.260   4.300    16   15.4   3:26 (245,-29)  
May  16   3  3.03    1 54.7   5.235   4.286    18   15.4   3:17 (248,-25)  

* C/2013 A1 ( Siding Spring )

It brightened up to 9 mag from autumn to winter in 2014. Now it is fading rapidly. It has already faded down to 14.2 mag (Apr. 11, Yasukazu Ikari). In the Northern Hemisphere, it will be observable in excellent condition after this while the comet will be fading. In the Southern Hemisphere, it is hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  14 40.01   56 58.7   2.507   2.946   105   15.4  23:29 (180, 68)  
May  16  14 12.30   56 37.7   2.629   3.017   102   15.7  22:34 (180, 68)  

* C/2006 S3 ( LONEOS )

It brightened up to 11-12 mag in 2012. It has already faded down to 15.2 mag (Mar. 16, Taras Prystavski). It keeps observable at 15 mag in good condition until summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  11  2.90   -5 13.7   8.884   9.436   120   15.5  20:27 ( 12, 49)  
May  16  11  0.84   -4 55.2   9.029   9.474   113   15.5  20:35 ( 26, 47)  

* 57P/du Toit-Neujmin-Delporte

Now it is 16.6 mag (Apr. 1, Taras Prystavski). It is expected to brighten up to 15 mag in summer, and will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  22 10.08   -8 18.4   1.667   1.733    76   15.6   3:26 (299, 23)  
May  16  22 25.97   -6 46.0   1.612   1.730    78   15.5   3:17 (298, 24)  

* C/2010 S1 ( LINEAR )

Now it is 14.7 mag (Apr. 1, Taras Prystavski). It is observable at 15-16 mag in good condition in 2015.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  18 48.82  -19 53.4   7.071   7.712   126   15.6   3:26 (355, 35)  
May  16  18 45.14  -20 16.7   7.006   7.742   133   15.6   3:13 (  0, 35)  

* C/2013 X1 ( PanSTARRS )

Now it is 14.8 mag and visible visually (Mar. 18, Sandor Szabo). It will pass close to the earth from spring to summer in 2016, and it is expected to be observable at 6-7 mag in good condition. It is already unobservable in the Southern Hemisphere. In the Northern Hemispehre, it will be getting lower gradually and will be unobservable temporarily in mid May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   4 53.74   33 21.1   5.340   4.494    29   15.7  20:27 (123, 11)  
May  16   4 56.72   33 22.3   5.328   4.426    24   15.6  20:35 (127,  6)  

* 218P/LINEAR

Now it is 16.0 mag recently (Apr. 17, A. Maury, J.-F. Soulier, T. Noel, J.-G. Bosch). In this apparition, it turns to approach to the sun down to 1.17 a.u., and it was expected to brighten up to 13 mag from March to May. But actually, it brightened up to 15.5 mag at best.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  20 35.39  -11 54.9   0.480   1.188    99   15.7   3:26 (322, 35)  
May  16  20 55.04  -10 26.5   0.488   1.206   101   15.8   3:17 (321, 36)  

* 32P/Comas Sola

It brightened up to 13 mag in winter. Now it is fading, 15.2 mag (Apr. 12, Sandor Szabo). It keeps observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  11 15.41   16  9.3   2.068   2.658   115   15.7  20:27 ( 14, 71)  
May  16  11 18.43   15  9.1   2.182   2.695   109   15.9  20:35 ( 33, 67)  

* C/2015 F2 ( Polonia )

Now it is 14.7 mag (Apr. 8, C. W. Hergenrother). It approaches to the earth, and brightens up to 15-16 mag from April to May. But it will be fainter than 18 mag in late July. It is observable in excellent condition in the Southern Hemisphere. It will be observable in excellent condition after May also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21 28.94  -12 44.3   0.734   1.220    87   15.7   3:26 (310, 26)  
May  16  21 42.21   -5 37.3   0.738   1.239    88   15.8   3:17 (306, 33)  

* 116P/Wild 4

Now it is 17.6 mag (Apr. 17, A. Diepvens), fainter than predicted. It will brighten up to 13 mag in 2016. It will be getting lower after this, and will be unobservable in early June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   6 52.50   25 57.2   3.209   2.740    53   16.0  20:27 (102, 30)  
May  16   7  3.30   25 37.4   3.258   2.715    49   16.0  20:35 (105, 25)  

* C/2015 D1 ( SOHO )

The spacecraft observed it brightened rapidly from 9 mag up to 2 mag when passing near by the sun. The nucleus has been already disintegrated, but the remnant was visible bright also on the earth (Mar. 7, Juan Jose Gonzalez). Now it is fainter than 10.3 mag (Mar. 17, Marek Biely). It locates high in the evening sky in the Northern Hemisphere. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   5 49.83   53 31.2   2.499   1.985    48   16.0  20:27 (137, 30)  
May  16   6  9.38   53 28.9   2.671   2.103    46   16.4  20:35 (138, 28)  

* C/2013 V2 ( Borisov )

Now it is 14.8 mag (Mar. 21, Taras Prystavski). In the Northern Hemisphere, it keeps 15-16 mag and observable in excellent condition until early summer. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  12 44.93   29 30.5   3.341   3.980   122   16.1  21:37 (  0, 84)  
May  16  12 42.54   28 14.3   3.435   4.010   118   16.2  21:07 (  0, 83)  

* C/2014 R1 ( Borisov )

It brightened up to 10.6 mag from autumn to winter (Nov. 29, Seiichi Yoshida). Now it is fading. It has already faded down to 14.3 mag (Mar. 24, Taras Prystavski). It keeps observable for a long time until the comet fades out.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  17 29.28  -14 52.2   1.793   2.680   144   16.2   2:25 (  0, 40)  
May  16  17 23.30  -15  0.2   1.816   2.753   152   16.4   1:52 (  0, 40)  

* 117P/Helin-Roman-Alu 1

It brightened up to 13 mag in 2014. It will be fading slowly after this. It is observable at 16 mag in excellent condition from summer to winter in 2015.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   0 37.42   -2 58.0   4.298   3.596    40   16.2   3:26 (271, -3)  
May  16   0 44.86   -2 12.9   4.246   3.611    45   16.2   3:17 (273,  0)  

* 51P/Harrington

It has not been observed yet in this apparition. But it must have already brightened up to 16.5 mag. It will be observable at 13 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  22 31.27  -13  3.3   1.958   1.927    73   16.5   3:26 (299, 16)  
May  16  22 47.24  -11 50.0   1.870   1.898    75   16.2   3:17 (298, 17)  

* 10P/Tempel 2

Now it is 16.7 mag (Apr. 19, J. Gonzalez). It keeps observable after this while the comet will be getting brighter graudually. It will brighten up to 11 mag from autumn to winter. But it locates low at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  14 23.24    7 27.8   1.341   2.290   153   16.7  23:15 (  0, 62)  
May  16  14 16.10    7 47.9   1.325   2.246   147   16.8  22:40 (  0, 63)  

* 221P/LINEAR

Now it is 18.3 mag (Apr. 19, Mt. Lemmon Survey). It will brighten rapidly, and will be observable at 16.5 mag in good condition from May to July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  16 32.72  -18 27.6   0.874   1.850   158   16.9   1:28 (  0, 36)  
May  16  16 31.66  -16 52.3   0.836   1.831   164   16.7   1:00 (  0, 38)  

* C/2012 X1 ( LINEAR )

It brightened rapidly in outburst in mid October in 2013, then it keeps bright as 8-10 mag for a long time until 2014 summer. Now it is fading. It has already faded down to 15.8 mag (Feb. 9, Taras Prystavski). In the Southern Hemisphere, it keeps observable in good condition for a long time after this until the comet fades out. It is not observable in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   1  6.39  -31 48.8   5.704   5.211    56   16.7   3:26 (293,-24)  
May  16   1 12.44  -31 54.4   5.697   5.272    60   16.8   3:17 (294,-22)  

* 299P/2014 D2 ( Catalina-PanSTARRS )

Now it is 17.7 mag (Feb. 17, K. Hills). It keeps observable at 17 mag from spring to summer. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  17 16.07  -28 25.6   2.267   3.163   147   16.8   2:12 (  0, 27)  
May  16  17 12.66  -28  8.5   2.225   3.168   154   16.7   1:41 (  0, 27)  

* C/2011 J2 ( LINEAR )

Getting observable again in the morning sky. It is fading, but it is observable at 17 mag in good condition until late autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23 44.50   13 13.8   6.213   5.583    47   16.8   3:26 (265, 17)  
May  16  23 46.25   13 10.9   6.168   5.627    53   16.8   3:17 (268, 20)  

* 318P/2014 M6 ( McNaught-Hartley )

First return of a periodic comet discovered in 1994. Now it is 17.5 mag (Mar. 23, iTelescope Observatory, Siding Spring). It will brighten up to 15 mag from summer to autumn, and will be observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21 59.41  -32 14.1   2.717   2.856    87   17.0   3:26 (318,  7)  
May  16  22  9.37  -32  7.3   2.607   2.826    91   16.8   3:17 (319,  8)  

* C/2013 G9 ( Tenagra )

Now it is 16.3 mag (Apr. 19, Catalina Sky Survey). It keeps 17 mag for a long time from 2014 to 2016.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  10 59.89  -18  8.9   4.793   5.405   122   16.9  20:27 ( 10, 36)  
May  16  10 54.31  -17 25.4   4.905   5.413   115   17.0  20:35 ( 22, 35)  

* P/2015 F1 ( PanSTARRS )

Now it is 17.2 mag (Mar. 24, iTelescope Observatory, Siding Spring). It keeps 17 mag until July. It is observable in excellent condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  16 40.20  -23 52.7   1.604   2.559   155   17.1   1:36 (  0, 31)  
May  16  16 35.69  -23 54.3   1.578   2.564   163   17.1   1:04 (  0, 31)  

* 61P/Shajn-Schaldach

Now it is 17.5 mag (Apr. 27, Hidetaka Sato). It will be observable at 15 mag in good condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23 35.05   -1 46.7   2.827   2.383    54   17.2   3:26 (280, 10)  
May  16  23 47.27   -0 38.7   2.738   2.360    57   17.1   3:17 (280, 12)  

* C/2015 H1 ( Bressi )

Now it is 17.5 mag (Apr. 21, T. H. Bressi, R. A. Mastaler). It keeps 17 mag until summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21  9.61   13  6.1   1.804   1.978    84   17.2   3:26 (291, 48)  
May  16  20 53.35   16 51.3   1.675   1.996    92   17.1   3:17 (295, 57)  

* 319P/2015 G1 ( Catalina-McNaught )

First return of a periodic comet discovered in 2008. Now it is 19 mag (Apr. 5, WISE). It will approach to the earth from spring to summer, and brighten rapidly. It will brighten up to 16 mag, and will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21  2.17   -7 15.2   0.899   1.375    91   17.5   3:26 (312, 35)  
May  16  21 31.11   -6 46.3   0.842   1.335    91   17.2   3:17 (310, 34)  

* P/2014 X1 ( Elenin )

Brightened rapidly, and it kept brightening even after the perihelion passage. It brightened up to 15.8 mag and visible visually in March (Mar. 18, Sandor Szabo). But it will be fading after this. Now it is 16.8 mag (Apr. 17, T. Linder, R. Holmes). It is observable in excellent condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   8 50.06   44 34.0   2.230   2.215    76   17.2  20:27 (119, 58)  
May  16   9  6.62   42 50.9   2.329   2.256    73   17.4  20:35 (116, 54)  

* 53P/Van Biesbroeck

Now it is 17.4 mag (Apr. 15, Catalina Sky Survey). It will brighten up to 14 mag and will be observable in good condition in 2016.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  12 32.87    3 21.6   2.814   3.627   137   17.2  21:25 (  0, 58)  
May  16  12 30.68    3 32.9   2.851   3.593   130   17.2  20:55 (  0, 58)  

* C/2014 W9 ( PanSTARRS )

It brightened rapidly, and brightened up to 15.7 mag (Jan. 31, Hidetaka Sato). But it is fading now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  16 17.63  -34 38.4   0.922   1.888   155   17.3   1:14 (  0, 20)  
May  16  16 12.54  -35 21.9   0.950   1.934   160   17.7   0:41 (  0, 20)  

* C/2014 AA52 ( Catalina )

It brightened up to 15.3 mag in winter (Jan. 17, Taras Prystavski). Now it is fading. It is observable in good condition in the Southern Hemisphere. It will be observable in good condition after June also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   0 58.42  -22 54.4   2.680   2.175    50   17.3   3:26 (286,-18)  
May  16   0 57.72  -21 42.8   2.628   2.209    54   17.3   3:17 (287,-14)  

* 70P/Kojima

It Brightened up to 15.2 mag and visible visually in March (Mar. 18, Sandor Szabo). Now it is fading. It has already faded down to 17.0 mag (Apr. 18, E. Bryssinck). It keeps observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  11 47.56   10 54.8   1.827   2.538   124   17.3  20:40 (  0, 66)  
May  16  11 49.55   10 23.3   1.928   2.569   118   17.5  20:35 ( 12, 65)  

* C/2012 K8 ( Lemmon )

Now it is 17.4 mag (Apr. 14, A. Klotz, F. Kugel, J. Nicolas, C. Rinner). It keeps observable at 17-18 mag for a long time from 2013 to 2016. It keeps locating high in the Northern Hemisphere. It keeps locating very low in the Southern Hemipshere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  16  8.05   65 16.6   6.510   6.702    96   17.3   1:04 (180, 60)  
May  16  15 53.26   65 41.7   6.546   6.714    95   17.3   0:22 (180, 59)  

* C/2013 G3 ( PanSTARRS )

Now it is 17.9 mag (Mar. 21, W. Hasubick). It was observed at 17 mag in 2014 summer. In the Northern Hemisphere, it is observable at 17.5 mag in excellent condition also in 2015. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  21 53.25   46 57.7   4.399   4.142    68   17.4   3:26 (236, 51)  
May  16  21 59.65   48  2.2   4.382   4.165    71   17.4   3:17 (235, 53)  

* 40P/Vaisala 1

It brightened up to 15.5 mag from autumn to winter (Nov. 25, Taras Prystavski). Now it is fading. It has already faded down to 17.5 mag (Apr. 15, A. Diepvens). It keeps observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  17 56.23   -8 12.0   1.643   2.475   136   17.5   2:52 (  0, 47)  
May  16  17 52.80   -8  7.1   1.632   2.518   143   17.6   2:21 (  0, 47)  

* P/2009 L2 ( Yang-Gao )

First return of a new periodic comet which brightened up to 12 mag in 2009. It seems to brighten up to 17 mag in summer. It is observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it keeps locating extremely low after June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   9 18.52   -6 58.2   1.356   1.774    96   17.9  20:27 ( 44, 37)  
May  16   9 28.04   -6 35.7   1.375   1.733    91   17.8  20:35 ( 51, 34)  

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

Now it is 17.6 mag (Sept. 14, Mitsunori Tsumura). It has brightened in outburst up to 14 mag twice, in 2006 January and 2011 May. It passes the perihelion in 2015. It keeps observable at 17 mag for a long time after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  23  8.49   -4 19.9   6.233   5.818    61   17.9   3:26 (286, 14)  
May  16  23 12.37   -3 57.0   6.136   5.818    67   17.9   3:17 (288, 17)  

* C/2013 U2 ( Holvorcem )

Now it is 17.0 mag (Apr. 1, Catalina Sky Survey). It was observed around 17-18 mag in early 2014. It will be observable around 17-18 mag again from 2014 autumn to 2015 spring, in excellent condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9   9 53.84   46 40.0   5.296   5.325    86   17.9  20:27 (129, 68)  
May  16   9 56.17   45 25.5   5.400   5.340    81   17.9  20:35 (122, 63)  

* P/2012 B1 ( PanSTARRS )

It had been observed at 15 mag for a long time from 2013 to 2014. Now it is fading. It will be observable at 18 mag in good condition from spring to summer. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   9  19 36.47  -29 23.7   4.599   5.130   116   17.9   3:26 (344, 24)  
May  16  19 36.13  -29 36.3   4.526   5.151   123   17.9   3:17 (349, 25)  

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