The Little Pinwheel (M99) LRGB

[HunterHarling]

This past week I've set up my Edge HD scope for some deep galaxy imaging, and I've almost gotten the spacing/ colimation right, almost...  Anyway, the clouds are back till Tuesday but I got enough exposure to process this image.

Edge HD 800 sct w .7 reducer

ASI1600mm

LRGB: 24x300s per filter, total = 8 hours of exposure. 

I was quite surprised by the amount of hydrogen visible in the arms of the galaxy. Usually I need several hours of Ha exposure to get to this level... It sure does look like the large Pinwheel Galaxy though!

This image is quite an aggressive crop, not sure if the resolution can handle it:

Thanks for looking, questions/ comments much appreciated!

[Davey-T]

Nice rendition, I've been capturing some LRGB of it recently with the 10"SCT but not got around to processing yet,  I was wondering if it's worth capturing some ha on it.

Dave

[HunterHarling]

2 hours ago, Davey-T said:

Nice rendition, I've been capturing some LRGB of it recently with the 10"SCT but not got around to processing yet,  I was wondering if it's worth capturing some ha on it.

Dave

Thanks.

I do think it might be worth it. I think I'm satisfied with the amount I capture with purely LRGB, but there's sure to be more.

[HunterHarling]

I found some dim galaxies in this field with Wikisky and annotated them in Pixinsight:

The dimmest one that it gave a catalog number for was magnitude 18.65! And there are much dimmer ones visible...

[michael.h.f.wilkinson]

Very nice!

[tomato]

Great result, as you say lots of Hydrogen signal in the spiral arms. This will be my next target, it will fit nicely in the FOV of my current set up.

[HunterHarling]

11 hours ago, michael.h.f.wilkinson said:

Very nice!

 

8 hours ago, tomato said:

Great result, as you say lots of Hydrogen signal in the spiral arms. This will be my next target, it will fit nicely in the FOV of my current set up.

Thanks Michael, Tomato!