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pblackwell

is there a best filter to use to view comet Neowise? 

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Hi all,

is there a best filter to use to view comet Neowise? 
 

Many thanks!

Paul

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The only filter that maybe useful is a light pollution filter to assist with seeing the tail but I’m not aware of any other filter that will assist as a comet is just a point of light similar to a star. Someone else may disagree 

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That’s what I thought. Not a big window to see it where I am so don’t want waste time trying different ones.

ill go filterless and will also try my light pollution ones.

thanks for your reply 👍🏻

 

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I've used a cheap M&SG filter to cut sunset haze a little bit to detect other horizon hugging comets in the past.

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Besides the obvious Swan bands, NEOWISE is showing a very bright emission of Sodium (Na) at 5890 A. Any filter which enhances the transmission in the wavelength should help.

(the attached annotated spectrum, based on an excellent spectrum from C Buil may help)

Comet NEOWISE (C Buil) annotated.jpg

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