Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Apr 21, 2016, 22:37:40

Title: Coma Cluster and a dwarf galaxy
Post by: MarkS on Apr 21, 2016, 22:37:40
Here is one of the worst images I've ever taken.  It was supposed to be the coma cluster but the conditions were awful, as you can see:

(http://www.markshelley.co.uk/Astronomy/2016/comacluster20160406small.jpg)

I haven't done any serious processing on the image because the data is so bad but here's the full size version if you are interested.  The main cluster of galaxies at the centre is interesting:
http://www.markshelley.co.uk/Astronomy/2016/comacluster20160406.jpg

Examining the image in detail, down towards the bottom right I found this weird blueish blob:

(http://www.markshelley.co.uk/Astronomy/2016/ngc4789A_comacluster20160406.jpg)

It turns out that this is a dwarf galaxy known as NGC4789A

Searching on the internet I found this beautiful Hubble image of the dwarf galaxy:
https://plus.google.com/113507009175485747967/posts/cG36BA3HsgM?pid=6152973526006825138&oid=113507009175485747967

Title: Re: Coma Cluster and a dwarf galaxy
Post by: The Thing on Apr 22, 2016, 10:47:19
Nasty. Better luck next time!
Title: Re: Coma Cluster and a dwarf galaxy
Post by: RobertM on Apr 22, 2016, 15:11:32
I've been there Mark, a processing nightmare.  It good what you managed to get out of it though.

Robert
Title: Re: Coma Cluster and a dwarf galaxy
Post by: Carole on Apr 22, 2016, 18:50:36
It's very pretty though.

Carole