Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: ApophisAstros on Aug 16, 2018, 14:40:04

Title: Comet 21/p Giacobini-Zinner **Cropped
Post by: ApophisAstros on Aug 16, 2018, 14:40:04
(https://cdn.astrobin.com/thumbs/A6Eg_1qYia1f_1824x0_fcAgcUjK.jpg)
(https://cdn.astrobin.com/thumbs/U95m0Wl5XXT__1824x0_fcAgcUjK.jpg)
My first comet image.!
264 x 20s Subs @ minus 20oC
60 x Darks
60 x Flats
I imaged this at the end of July in my back garden in Worthing , but only just processed it using DSS comet stacking and PS CC 64bit.
I compared it with this one on this site https://solarsystem.nasa.gov/small-bodies/comets/21p-giacobini-zinner/in-depth/ (https://solarsystem.nasa.gov/small-bodies/comets/21p-giacobini-zinner/in-depth/)and it compares well.
Roger
Title: Re: Comet 21/p Giacobini-Zinner
Post by: Carole on Aug 16, 2018, 14:46:00
Its a bit dark Roger, and when stretched it reveals both stars and trailing (trailing is normal for comet stacking, so presume you put the stars back in).

But well done sussing out the DSS comet stacking mode, I found it very temperamental and ended up doing a manual stack. 

Carole
Title: Re: Comet 21/p Giacobini-Zinner
Post by: MarkS on Aug 16, 2018, 22:27:26
Nicely caught!

Which camera and scope did you use?  I was guessing DSLR because you didn't mention separate R,G,B subs.  Then I noticed minus20C and I'm sure it hasn't been that cold in Worthing for a while!

From a processing point of view you must sort out the colour balance (it's far too blue on my screen) then brighten it up a bit.

Mark
Title: Re: Comet 21/p Giacobini-Zinner
Post by: ApophisAstros on Aug 16, 2018, 22:42:47
My kit used is in the my signature , i agree with your comments.
Will try and finetune.
Roger
Title: Re: Comet 21/p Giacobini-Zinner
Post by: MarkS on Aug 17, 2018, 09:02:25
Quote from: Apophis
My kit used is in the my signature.

Yes, that's true for now.  But in the future, when you upgrade your signature, it will no longer match the kit used for this image.

Mark


Title: Re: Comet 21/p Giacobini-Zinner
Post by: NoelC on Aug 17, 2018, 09:11:07
Well done for finding it.

Noel
Title: Re: Comet 21/p Giacobini-Zinner
Post by: ApophisAstros on Aug 17, 2018, 09:20:57
Quote from: MarkS on Aug 17, 2018, 09:02:25
Quote from: Apophis
My kit used is in the my signature.

Yes, that's true for now.  But in the future, when you upgrade your signature, it will no longer match the kit used for this image.

Mark
I will mainly use that kit and for the few times i may use my StarAdventurer and DSLR i will amend into post. But i only intend to use the same kit for ages.
Roger