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29P/Schwassmann-Wachmann outburst January 14, 2021

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#1 cbellh47

cbellh47

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Posted 19 January 2021 - 08:44 AM

29P/Schwassmann-Wachmann went into an outburst sometime around January 14, 2021.


The French comets web site is at https://lesia.obspm....omets/index.php

clicking on "Afficher les observations" brings up an extensive online table of comet observations and images.
 

Francois Kugel and J. F. Soulier have posted images and observations showing the change in magnitude from about 17.3 the day before to at about 2021 01 13.7 to 14.9 one night later at about 2021 01 14.7

The object has begun to show a typical expansion disk.
The french site has a nice online feature for plotting magnitudes for each comet. Nuclear magnitude plots for 29P show the characteristic decline in brightness following an outburst. I attached a plot showing a portion of the timeline back a year and a half showing how this outburst compares with others.


Members from the BAA comets group  about the outburst on the comets-ml mailing list

https://groups.io/g/comets-ml/topics

29P has always been one of my favorite objects to observe and study. I hope that other comet observers can make reports about it here.

I hope to also observe it soon from H47.


 


 

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  • 29P Outburst Jan 14 2021 outburst0-nuclear magnitudes -2021Jan19.PNG

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#2 cbellh47

cbellh47

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Posted 29 January 2021 - 11:13 AM

Jean-Francois Soulier posted images and observations of 29P/Schwassmann-Wachmann onJanuary 25, 2021, reporting Nuclear magnitude (m2) = 16.2

This is 11 days after the January 14, 2021 outburst and is about one magnitude brighter than its pre-outburst magnitude of 17.3

The expansion disk is not so bright.  There is a bright circular condensation estimated diameter of 20 arcsec.
The outer coma is extended toward the south east from PA 040 to 190 deg (measured CCW eastward from north)

https://lesia.obspm....1.php?Num=22901

A plot of nuclear magnitude (m2) from all observers for 29P shows the typical decline in brightness, that resembles an exponential decay toward its quiescent brightness.




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