Comet 21P

Specific upcoming events: comets, meteors, supernovae, eclipses, etc.
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Comet 21P

Unread post by DonB » Wed Sep 05, 2018 2:15 pm

Has anyone seen 21P yet. It is supposedly just over mag 7. It will skirt M36,37 &38 and on the morning of the 15th it goes right through M35. It just passed Capella. Hopefully the mag is correct and we should get some images, weather permitting.

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Re: Comet 21P

Unread post by TimW » Wed Sep 05, 2018 3:20 pm

I was hoping to sneak out tonight and get a peak but it won't rise until nearly 10pm. Too late for me on a work night. Perhaps Fri or Sat nights weather permitting.
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Re: Comet 21P

Unread post by Stargrrl » Fri Sep 07, 2018 4:48 am

21P will be at its closest in 72 years, Sept 10 is closest approach, and reportedly at mag 6.5 to 7 (visible in binos). This article provides a variety of star charts for where to look: ... tanen-2018

(It also mentions Comet Wirtanen, which will be coming very close to earth in mid-December, with a possible mag of 3.5 to 6!)

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Re: Comet 21P

Unread post by Paul D » Fri Sep 07, 2018 10:34 pm

Here is a three Panel chart for the night of the 11th at around 2:00am. Upper left panel is naked eye, right panel is in a finder scope or through a telrad. Lower panel is in a low power eyepiece.

ImageComet 21P by kyphoron, on Flickr

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