Forum der Vereinigung der Sternfreunde

Entdeckung - C/2020 J1 (SONEAR): 17m
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Autor:  Uwe Pilz [ 05. Mai 2020, 06:37:47 AM ]
Betreff des Beitrags:  Entdeckung - C/2020 J1 (SONEAR): 17m

Orbital elements:
    C/2020 J1 (SONEAR)                                                          
T 2021 Apr. 15.73083 TT                                 Rudenko                 
q   3.2564643            (2000.0)            P               Q                  
                   Peri.  344.44934     -0.48942481     -0.74407646             
                   Node   227.85659     -0.72032848     +0.05101501             
e   1.0            Incl.  142.16901     -0.49151829     +0.66614390       
MPEC 2020 J37 , cbet 4769

Autor:  Mike Olason [ 08. Mai 2021, 12:55:04 PM ]
Betreff des Beitrags:  Re: Entdeckung - C/2020 J1 (SONEAR): 17m

Hi All,

Comet C/2020 J1 (SONEAR) has brightened as expected as it makes it's close approach to Earth on May 16 when it may reach magnitude 13. Unfortunately for most it is still at a declination of -32 degrees.

In these images the comet is magnitude 13.2 with a coma/tail of 30" more to the left (PA 90 degrees) of the nucleus as the comet is 223 million miles (359 million km) from the Earth in these images taken on 05/06/2021. The Earth is almost lined up between the Sun and comet, thus the tail is pointing away from the Earth mostly behind the comet as seen from the Earth I assume. I am most certainly not an expert on tails but looking at the geometry of the Sun, Earth and comet that appears to be what the images are showing. Anyone who would like to provide more thoughts on what the images show in relation to the coma/tail please do so.

2020J1_20210506_0806_molason.jpg [ 170.14 KiB | 537 mal betrachtet ]

Autor:  Mike Olason [ 03. Juni 2021, 12:33:40 PM ]
Betreff des Beitrags:  Re: Entdeckung - C/2020 J1 (SONEAR): 17m

Hello All,

Collected some images of C/2020 J1 (SONEAR) on 18 May 2021 two days after it's close approach to Earth. The comet was magnitude 12.1 with a tail > 4' long at PA 141 degrees and a coma of about 50".

Helmut and Michael collected some nice images of the comet on May 20 and May 30 respectively which are in the comet image database.

2020J1_20210518_0655_molason.jpg [ 296.83 KiB | 232 mal betrachtet ]

Autor:  Werner Hasubick [ 03. Juni 2021, 13:34:28 PM ]
Betreff des Beitrags:  Re: Entdeckung - C/2020 J1 (SONEAR): 17m

Ich habe diesen Kometen visuell am 1.6. auf 12.0 mag geschätzt. Bei ihm war das MPC Guide-File mal wieder veraltet, der MPES ok.



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