Weekly Information about Bright Comets (2016 May 21: North)

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 Updated on May 22, 2016
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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/2013 X1 ( PanSTARRS )

Now it is 7.3 mag (May 14, Marco Goiato). It will pass close to the earth from spring to summer, and it is expected to brighten up to 6 mag. In the Southern Hemisphere, it keeps observable in excellent condition after this. In the Northern Hemisphere, it locates low in the south. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  23  9.99   -9 20.4   1.243   1.390    75    6.9   3:12 (295, 18)  
May  28  22 56.10  -13 53.8   1.060   1.427    86    6.7   3:06 (305, 21)

* 252P/LINEAR

It passed only 0.036 a.u. from the earth on Mar. 21-22, and brightened up to 3.9 mag (Mar. 21, Thomas Lehmann). It kept brightening even after the perihelion passage. However, it is fading now. It has already faded down to 9.1 mag (May 20, Thomas Lehmann). It keeps observable in excellent condition for a while after this both in the Northern Hemisphere and Southern Hemisphere. It may fade out very rapidly. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  16 55.97    8 25.6   0.376   1.344   147    9.3   1:02 (  0, 63)  
May  28  16 49.16    7 29.6   0.430   1.403   150   10.2   0:27 (  0, 63)

* C/2014 S2 ( PanSTARRS )

Now it is 10.2 mag (May 15, Juan Jose Gonzalez). It will be fading slowly after this. It is observable in excellent condition in the Northern Hemisphere. It is observable in the evening sky also in the Southern Hemisphere until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  10 58.54   39 41.5   2.637   2.812    89   10.7  20:41 (110, 70)  
May  28  11  0.08   36 37.9   2.769   2.863    84   10.9  20:48 (103, 63)

* 81P/Wild 2

Now it is 11.2 mag (May 10, Thomas Lehmann). It keeps 11 mag until summer. In the Northern Hemisphere, it will be getting lower after this, and will be unobservable in June. It locates somewhat low in the Southern Hemisphere, but it keeps observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   7 43.72   21 36.5   2.088   1.700    53   11.8  20:41 ( 99, 25)  
May  28   8  2.05   20 57.2   2.111   1.678    51   11.7  20:48 (101, 22)

* 9P/Tempel 1

Now it is 13.6 mag (May 7, Jakub Cerny). Brightening very rapidly, but it is fainter than this ephemeris. It is expected to be observable at 11 mag in good condition until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  11 44.93   14 26.0   1.062   1.700   110   11.9  20:41 ( 34, 66)  
May  28  11 50.04   12 31.2   1.088   1.674   105   11.8  20:48 ( 45, 60)

* C/2015 WZ ( PanSTARRS )

Now it is very bright as 11.5 mag (May 8, Jakub Cerny). In the Northern Hemisphere, it is observable at 12 mag in excellent condition until June. It locates very low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  22 33.83   40 36.0   1.481   1.469    69   12.0   3:12 (246, 49)  
May  28  22  5.72   44 57.6   1.356   1.506    77   12.1   3:06 (240, 58)

* C/2014 W2 ( PanSTARRS )

Now it is 12.2 mag (May 2, Seiichi Yoshida). It keeps 12-13 mag for a long time from 2015 autumn to 2016 summer. In the Northern Hemispehre, it keeps observable in good condition for a long time. It keeps unobservable until July in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  17 25.88   71 23.8   2.636   2.773    86   12.3   1:32 (180, 54)  
May  28  16 52.21   69 53.8   2.631   2.794    88   12.3   0:31 (180, 55)

* C/2013 US10 ( Catalina )

Now it is 11.9 mag (May 4, Seiichi Yoshida). It brightened up to 6 mag from autumn to winter. Now it is fading. It is not observable after this in the Southern Hemisphere. It will be extremely low from May to June also in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   5  7.12   46 41.3   3.820   2.993    30   12.7  20:41 (140, 12)  
May  28   5 13.30   46 38.1   3.941   3.077    27   12.9  20:48 (143,  8)

* 43P/Wolf-Harrington

It will brighten up to 11 mag from summer to autumn. However, it was faint as 18.2 mag in February (Feb. 17, Alexander Baransky), fainter than this ephemeris by 2 mag. It will appear in the morning sky soon, but it keeps low for some time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   2  2.96   21  0.3   2.541   1.684    25   13.4   3:12 (245,  1)  
May  28   2 23.87   22 14.7   2.480   1.642    26   13.1   3:06 (244,  2)

* 29P/Schwassmann-Wachmann 1

It is observable in excellent condition in the Southern Hemisphere. Now it is faint as 17.1 mag (Apr. 27, Jean-Francois Soulier). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  19 55.31  -25 16.8   5.309   5.936   124   13.4   3:12 (347, 29)  
May  28  19 54.23  -25 19.3   5.219   5.934   131   13.4   3:06 (353, 29)

* 116P/Wild 4

Now it is 13.1 mag (May 5, Chris Wyatt). It keeps 13 mag for a while. It is observable in excellent condition 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  21  15 35.06  -23 12.6   1.358   2.368   175   13.5  23:36 (  0, 32)  
May  28  15 29.71  -23  2.7   1.386   2.387   168   13.7  23:04 (  0, 32)

* 53P/Van Biesbroeck

Now it is 14.6 mag (May 11, Hiroshi Abe). It will be observable at 14 mag in good condition from spring to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  20 58.61  -11 43.9   1.946   2.433   106   14.3   3:12 (325, 36)  
May  28  21  4.34  -11 22.8   1.875   2.438   111   14.2   3:06 (329, 38)

* 118P/Shoemaker-Levy 4

It is not observable now. It will be observable at 16.5 mag in September in the Northern Hemisphere, or in November in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   4 58.38   17 17.3   2.945   1.992    15   14.3  20:41 (119, -9)  
May  28   5 15.79   17 49.1   2.957   1.986    13   14.2  20:48 (122,-12)

* C/2011 KP36 ( Spacewatch )

Now it is 15.1 mag (Jan. 2, Ken-ichi Kadota). 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  21   0 11.91    1 20.1   5.362   4.883    56   14.5   3:12 (277, 12)  
May  28   0 17.50    1 39.2   5.273   4.883    62   14.5   3:06 (279, 15)

* 77P/Longmore

Now it is bright as 13.0 mag (May 6, Marco Goiato). It is observable at 14 mag in good condition from winter to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  12 32.09  -16 24.1   1.531   2.338   132   14.8  20:41 (  2, 38)  
May  28  12 30.75  -17  9.6   1.596   2.340   125   14.9  20:48 ( 13, 37)

* 104P/Kowal 2

Now it is bright as 13.1 mag (May 4, Seiichi Yoshida). Although it was faint as 19.0 mag in January (Jan. 10, B. Lutkenhoner), it brightened rapidly in February. It will fade out rapidly after this. It keeps observable until May in the Northern Hemisphere, or until July in the Southern Hemisphere. But it keeps extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   6 29.01   16 50.7   2.013   1.355    37   15.0  20:41 (105,  8)  
May  28   6 54.83   16 10.4   2.069   1.398    36   15.3  20:48 (106,  6)

* 146P/Shoemaker-LINEAR

Now it is 15.9 mag (May 4, Hidetaka Sato), brighter than originally predicted. It will brighten up to 14 mag in summer. In the Southern Hemisphere, it keeps observable until winter, but it locates somewhat low. In the Northern Hemisphere, it is not observable now. It will appear in the morning sky in July, then it will be observable in excellent condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   1 18.75   -9 25.6   1.980   1.503    47   15.3   3:12 (276, -8)  
May  28   1 39.33   -6 49.6   1.942   1.480    48   15.0   3:06 (274, -6)

* C/2015 T4 ( PanSTARRS )

Now it is bright as 14.9 mag (May 4, Hidetaka Sato). It keeps 15 mag for a long time until 2016 autumn. In the Southern Hemisphere, it keeps observable for a long time. It will be unobservable after this in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   5  0.32  -35 11.1   2.696   2.319    57   15.1  20:41 ( 69,-38)  
May  28   5 13.76  -36 37.2   2.654   2.309    59   15.1  20:48 ( 69,-42)

* C/2015 TQ209 ( LINEAR )

It will brighten up to 13 mag in summer. But it keeps unobservable for a long time. It will appear in the morning sky in December, when the comet will be fainter than 15 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   4 51.44   17 53.2   2.939   1.974    14   15.3  20:41 (120,-10)  
May  28   5  8.89   18  4.4   2.890   1.911    11   15.1  20:48 (123,-13)

* C/2015 V2 ( Johnson )

Now it is 15.4 mag (May 17, H. Boussier). It is expected to brighten up to 7 mag in 2017 summer. In the Northern Hemisphere, it keeps observable in good condition until the highlight while the comet will be brightening. In the Southern Hemisphere, it is not observable until early 2017. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   7 23.58   57 37.5   5.280   4.749    53   15.4  20:41 (140, 35)  
May  28   7 32.41   57  9.6   5.274   4.685    49   15.3  20:48 (141, 31)

* 65P/Gunn

Now it is 16.3 mag (May 12, Yasukazu Ikari). It will brighten up to 14 mag in 2017. In 2016, it keeps observable at 16 mag in good condition from winter to spring. The perihelion distance increases from 2.4 a.u. to 2.9 a.u. in this apparition, and the comet will not brighten as before. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  11 21.05   14  0.4   3.324   3.720   105   16.3  20:41 ( 45, 63)  
May  28  11 22.35   13 29.9   3.407   3.704    99   16.3  20:48 ( 56, 57)

* C/2015 ER61 ( PanSTARRS )

Now it is 16.4 mag (May 7, K. Sarneczky). The cometary activity is confirmed recently. It is expected to brighten up to 7 mag in 2017 spring. But it locates somewhat low at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  11  6.28   -0 27.9   4.270   4.677   107   16.4  20:41 ( 36, 48)  
May  28  11  6.11   -0 16.1   4.309   4.607   100   16.3  20:48 ( 47, 44)

* C/2014 W11 ( PanSTARRS )

It brightened very rapidly in 2015 spring, and reached up to 13.8 mag (May 11, Sandor Szabo). It is bright as 14.4 mag still now (May 12, Yasukazu Ikari). It is observable in excellent condition 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  21  13 43.79  -27 39.0   3.312   4.218   149   16.3  21:46 (  0, 27)  
May  28  13 41.93  -27  8.4   3.387   4.246   143   16.4  21:16 (  0, 28)

* C/2014 Q2 ( Lovejoy )

It brightened up to 3.7 mag and became a naked eye comet in mid January in 2015 (Jan. 13, Marek Biely). Now it is fading. It has already faded down to 16.0 mag (May 7, Yuji Ohshima). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  18  9.57   27  0.1   5.090   5.694   122   16.4   2:15 (  0, 82)  
May  28  18  4.34   27  1.8   5.111   5.757   125   16.4   1:42 (  0, 82)

* 100P/Hartley 1

Now it is 15.1 mag (May 12, Yuji Ohshima). It will brighten up to 16 mag from April to May. 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  21  15  8.83  -36 20.4   1.062   2.046   161   16.6  23:10 (  0, 18)  
May  28  14 59.31  -37 40.0   1.089   2.057   156   16.7  22:33 (  0, 17)

* C/2016 B1 ( NEOWISE )

Now it is bright as 15.9 mag (Apr. 9, Hidetaka Sato). It keeps 16 mag for a long time from 2016 to 2017. In 2016, it is observable in excellent condition in the Southern Hemisphere, but it locates extremely low in the Northern Hemispehre. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  11 58.58  -36  3.6   3.013   3.710   126   16.8  20:41 (  9, 18)  
May  28  12  0.63  -34 16.3   3.037   3.678   122   16.7  20:48 ( 16, 19)

* C/2015 Y1 ( LINEAR )

It brightened rapidly, and reached up to 15.5 mag (Feb. 11, Yasukazu Ikari). Now it is fading. It has already faded down to 16.5 mag (May 9, D. Buczynski). It keeps observable until August when the comet becomes fainter than 18 mag in the Northern Hemisphere. It will be unobservable soon in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   8 43.09   41 38.1   2.786   2.515    64   16.7  20:41 (117, 44)  
May  28   8 53.36   42 24.6   2.868   2.518    59   16.8  20:48 (119, 40)

* C/2015 O1 ( PanSTARRS )

Now it is 17.2 mag (May 8, Space Surveillance Telescope, Atom Site). It will be observable at 13 mag for a long time from 2017 to 2018. In 2016, it keeps observable at 16-17 mag in good condition until autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  20 14.88  -12 48.4   5.993   6.514   116   16.8   3:12 (338, 40)  
May  28  20 11.16  -12 28.6   5.845   6.471   124   16.7   3:06 (346, 41)

* C/2014 A4 ( SONEAR )

It brightened up to 15 mag from late 2014 to early 2016. Now it is fading slowly. In the Northern Hemisphere, it will be observable at 17 mag in autumn in good condition. It locates extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   0 24.03   31 11.5   5.322   4.701    47   16.9   3:12 (248, 25)  
May  28   0 23.72   32 22.6   5.264   4.727    53   16.9   3:06 (249, 30)

* 333P/LINEAR

First return of an object discovered as an asteroid 2007 VA85 in 2007. It brightened very rapidly since mid February, and brightened up to 11.3 mag in spring (Mar. 5, Juan Jose Gonzalez). In the Northern Hemisphere, it locates extremely low in May, but it will be observable in the morning sky after June. However, it may fade out very rapidly and may be fainter than 18 mag. It keeps unobservable until September in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   2 58.94   43 50.6   2.118   1.289    26   16.9   3:12 (220,  7)  
May  28   2 55.08   45 25.6   2.121   1.338    29   18.3   3:06 (222, 11)

* C/2014 R3 ( PanSTARRS )

Now it is 16.9 mag (May 7, K. Sarneczky). It brightened rapidly, and became brighter than originally expected. It keeps 17 mag until 2017. 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  21  14 26.23   74 45.9   7.327   7.293    84   17.2  22:26 (180, 50)  
May  28  14  7.89   74  9.1   7.361   7.290    82   17.2  21:40 (180, 51)

* C/2012 F3 ( PanSTARRS )

It brightened up to 13-14 mag from 2014 to 2015. Now it is fading. It has already faded down to 18.1 mag (Apr. 23, Slooh.com Canary Islands Observatory). It will be observable at 17 mag in 2016. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  23 12.88   -3 25.5   5.246   5.032    72   17.2   3:12 (290, 21)  
May  28  23 16.43   -3  9.9   5.185   5.074    78   17.2   3:06 (293, 24)

* C/2010 S1 ( LINEAR )

It was observed as bright as 13-14 mag for a long time from 2011 to 2014. Now it is fading. It is observable in excellent condition in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere. No observations have been reported since August, 2015. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  17 50.56  -36 10.5   8.571   9.457   149   17.3   1:56 (  0, 19)  
May  28  17 46.05  -36 27.7   8.556   9.491   156   17.3   1:24 (  0, 19)

* 180P/NEAT

Now it is 16.8 mag (May 10, Catalina Sky Survey). It keeps observable at 17 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  14 37.16    2 21.3   1.761   2.691   150   17.3  22:39 (  0, 57)  
May  28  14 33.00    1 39.1   1.813   2.707   145   17.4  22:07 (  0, 57)

* 219P/LINEAR

Now it is 19.3 mag (May 4, Hidetaka Sato). It will brighten up to 16.5 mag in summer and will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  18 19.23  -14 26.0   2.042   2.925   144   17.5   2:25 (  0, 41)  
May  28  18 16.17  -13 50.8   1.971   2.902   151   17.4   1:54 (  0, 41)

* C/2014 OE4 ( PanSTARRS )

Now it is 16.5 mag (May 11, D. Buczynski). It keeps 17 mag from 2016 to 2017. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it locates low in 2016, and it is not observable in 2017. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  17 13.14   31 38.0   5.769   6.399   124   17.4   1:18 (  0, 87)  
May  28  17  9.01   32 34.2   5.757   6.389   124   17.4   0:47 (  0, 88)

* C/2006 S3 ( LONEOS )

It brightened up to 11-12 mag in 2012. It has already faded down to 18.3 mag (May 1, J. Oey, P. Camilleri, H. Williams). It is observable at 17 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  10 21.38   -2 21.0  11.284  11.464    97   17.4  20:41 ( 48, 41)  
May  28  10 20.77   -2 10.8  11.440  11.502    90   17.4  20:48 ( 57, 35)

* C/2016 J2 ( Denneau )

New comet. Now it is bright as 15.6 mag (May 6, Hidetaka Sato). It goes away from the earth rapidly, and it will be fainter than 18 mag in June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  10  8.89   -3 57.1   1.165   1.612    95   17.4  20:41 ( 50, 38)  
May  28  10 10.84    2 14.3   1.352   1.647    87   17.8  20:48 ( 63, 37)

* P/2008 J3 ( McNaught )

First return of a new periodic comet which brightened up to 16.5 mag in 2008. The condition of this apparition is very good. It is expected to brighten up to 15.5 mag in autumn and will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  23 32.95  -24  9.4   2.684   2.648    77   17.6   3:12 (303,  4)  
May  28  23 42.00  -23 18.2   2.583   2.625    81   17.4   3:06 (304,  6)

* 188P/LINEAR-Mueller

It is expected to brighten up to 16 mag and observable in good condition in autumn. However, it is so faint as 19.7 mag now (Apr. 16, A. Maury, J.-B. de Vanssay, J.-G. Bosch, J.-F. Soulier). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  22 47.94  -15  5.7   3.097   3.131    82   17.6   3:12 (304, 18)  
May  28  22 54.30  -14 28.6   2.980   3.107    87   17.5   3:06 (306, 21)

* C/2015 H2 ( PanSTARRS )

Now it is 18.0 mag (Apr. 12, A. Maury, J.-B. de Vanssay, J.-G. Bosch, J.-F. Soulier). It keeps observable at 17.5 mag in good condition from spring to autumn in the Southern Hemisphere. It is not observable in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  18 15.81  -63 35.2   4.332   5.046   130   17.7   2:22 (  0, -9)  
May  28  18 12.52  -63 59.4   4.285   5.037   133   17.7   1:51 (  0, -9)

* C/2013 C2 ( Tenagra )

Very far object. Outburst occured on Feb. 20, 2015, and it brightened up to 15 mag. Now it is 16.7 mag (Apr. 4, Hidetaka Sato). 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  21  13 12.71  -23 48.3   8.355   9.184   143   17.7  21:15 (  0, 31)  
May  28  13 11.73  -23 28.7   8.424   9.187   136   17.8  20:48 (  1, 31)

* P/2006 F1 ( Kowalski )

Although it was bright as 17 mag at the discovery in 2006, it faded out before the perihelion passage in 2008, and it became lost. Now it is fainter than 22 mag (June 15, 2015, Erwin Schwab, Marco Micheli). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  15 45.29    6 36.7   3.562   4.488   153   17.8  23:47 (  0, 62)  
May  28  15 41.31    6 36.9   3.573   4.482   150   17.8  23:15 (  0, 62)

* C/2014 Y1 ( PanSTARRS )

Now it is 16.8 mag (Apr. 12, Hidetaka Sato). It was expected to brighten up to 14 mag from winter to summer. But it is much fainter actually. It will be observable in excellent condition 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)  
May  21  16 25.37  -39 35.4   1.677   2.648   159   17.8   0:31 (  0, 15)  
May  28  16 20.50  -39 56.4   1.709   2.690   161   17.9  23:54 (  0, 15)

* 67P/Churyumov-Gerasimenko

It brightened up to 11.1 mag in 2015 autumn (Sept. 21, Seiichi Yoshida). Now it is 17.6 mag (Apr. 29, D. Buczynski). It keeps observable in good condition after this, while the comet will be fading gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  11 15.55   11 11.1   2.621   3.047   105   17.8  20:41 ( 43, 59)  
May  28  11 18.32   10 32.9   2.762   3.093    99   18.0  20:48 ( 54, 54)

* C/2015 LC2 ( PanSTARRS )

Now it is 16.4 mag (May 10, Catalina Sky Survey). It becomes brighter than at the discovery in 2015. It is observable at 17 mag in good condition from spring to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  14 51.67    4 22.1   5.578   6.484   151   17.8  22:53 (  0, 59)  
May  28  14 47.88    5 10.0   5.648   6.504   145   17.9  22:22 (  0, 60)

* C/2016 A1 ( PanSTARRS )

It keeps 16 mag for a long time from 2017 to 2018. Now it is 17.8 mag (May 13, J. Oey, P. Camilleri, H. Williams). In the Southern Hemisphere, it keeps observable in good condition until early summer. It will be unobservable in May in the Northern Hemispehre. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21   8 55.66  -19 58.4   6.698   6.677    84   17.9  20:41 ( 53, 14)  
May  28   8 56.53  -18 59.3   6.770   6.647    78   17.9  20:48 ( 60,  9)

* 19P/Borrelly

Now it is 18.3 mag (May 8, A. Diepvens). In the Northern Hemisphere, it keeps observable in good condition after this while the comet will be fading. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  21  13  8.36   27 24.6   2.908   3.501   118   17.9  21:10 (  0, 82)  
May  28  13  5.73   26 20.3   3.022   3.542   112   18.0  20:48 ( 12, 81)

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