David

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Sat, 11 Jul 2020 12:20:18 +0100

Subject:
Re: [BAA Comets] 2020 F3 (NEOWISE) on2020 July 11.06

Richard,

Great images. It was a stunning sight last night for those of us lucky
enough to have clear skies. I have loads of images of the comet and the
really spectacular NLCs from this morning but I have rushed to process a
couple taken with different focal lengths, 80mm and 200mm. In both cases
the photocentre is not saturated so there should be a load of detail I
can pull out later.

http://www.nickdjames.com/Comets/2020/2020f3_20200711_0120_ndj.jpg
http://www.nickdjames.com/Comets/2020/2020f3_20200711_0045_ndj.jpg

Hoping for clear skies again tonight. This must be the best comet seen
from the UK since Hale-Bopp in 1997.

Nick.

On 11/07/2020 12:08, Richard Miles - rmiles.btee at btinternet.com (via
baa-comet list) wrote:
> Here's my best effort from the early hours last night.
>
> I imaged both with a V filter and unfiltered. With the comet being so
> low in the sky, unfiltered images showed the effects of atmospheric
> dispersion smearing out the star images slightly plus more sky gradient,
> so although I have a stack of 24 x 30 sec unfiltered, the 15 x 30 sec
> stack is the better result.
>
> No background sky gradient filter has been applied as there are subtle
> contrast differences, which would otherwise be lost.
>
> Also have a few B, V, r and i images taken with the 0.35-m I've yet to
> look at.
>
> Richard
>
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