NGC7424 Grand Design Galaxy

cometcatcher (Kevin) · #1 16-09-2018, 09:23 AM

Hard target for low budgets! My second deep sky image with the new ASI183mm Pro. I don't pick easy ones do I.

Still using toy filters. Real ones are in the mail! Hopefully they will be here for next new Moon. The GSO blue 80A looks especially crappy. Star shapes were not that good with it. Framing could have been better. I wanted the top mag 6 star in it but probably should have made it landscape orientation.

Luminance 179x60 seconds (Baader UV/IR cut)
Yulong 30nm Ha as red channel 192x60 seconds
Hoya X1 Green 143x60 seconds
GSO 80A Blue 229x60 seconds (all double stacked to the Baader UV/IR cut) all Bin2 because it looked betterer.

Total 12.4 hours.

ASI183mm Pro at -10C, gain 350, HEQ5 Pro, guided with PHD2 crashaholic. GSO 10" F4 Newtonian.

Lots of swear words went into the making of this image. As Mike Sidonio says, "image acquisition stress sucks".

Bigger at Astrobin ---> https://astrob.in/366958/0/

markas (Mark) · #2 16-09-2018, 09:41 AM

No, it isn't an easy one! But you have got a decent image

Mark

cometcatcher (Kevin) · #3 16-09-2018, 09:52 AM

Thanks Mark! Yes I am surprised I have a half decent image of it. Not a lot of images around of it. This is my first try at it.

silv (Annette) · #4 16-09-2018, 10:09 AM

cool object. So much action! You can see it truly swirling through space.

cometcatcher (Kevin) · #5 16-09-2018, 10:18 AM

Quote:

Originally Posted by silv

cool object. So much action! You can see it truly swirling through space.

It looks a lot like a pinwheel in this image. I guess a lot of them do when looking at them face on.

strongmanmike (Michael) · #6 16-09-2018, 10:26 AM

I agree with Annette, I have always thought this galaxy really looks like it is spinning. Nice job Kevin, good luck with the new filters...when they arrive

Mike

RickS (Rick) · #7 16-09-2018, 11:29 AM

Another triumph of improvisation, Kevin

A good result on a tough target.

cometcatcher (Kevin) · #8 16-09-2018, 12:02 PM

Quote:

Originally Posted by strongmanmike

I agree with Annette, I have always thought this galaxy really looks like it is spinning. Nice job Kevin, good luck with the new filters...when they arrive

Mike

Thanks Mike. Can't wait to get my hands on them. I might even be able to do RGB planet imaging.

Quote:

Originally Posted by RickS

Another triumph of improvisation, Kevin

A good result on a tough target.

Thanks Rick! I'm looking forward to improvising a little less! Turing that dial looks so much easier.

Ryderscope (Rodney) · #9 16-09-2018, 12:10 PM

That's come up quite well Kevin. I've just finished capturing some data on this one myself and looking forward to the processing. I think that it's good to try for the hard ones anyway. Nothing like a challenge

cometcatcher (Kevin) · #10 16-09-2018, 01:43 PM

Thanks Rodney. Knowing you, your image will be awesome! Looking forward to seeing it.

silv (Annette) · #11 16-09-2018, 04:30 PM

@Kevin "It looks a lot like a pinwheel in this image. I guess a lot of them do when looking at them face on."
Probably.
With other spiral galaxies the "accretion force" by a center mass is perceivable in how their arms are closing in around the middle.
With this one, it looks as if it's loosing its arms instead of pulling them in. Like a lawn sprinkler just starting to spin?

willik (Willik) · #12 16-09-2018, 05:07 PM

Very nice looking Galaxy Kevin.
Martin

cometcatcher (Kevin) · #13 16-09-2018, 05:50 PM

Quote:

Originally Posted by silv

@Kevin "It looks a lot like a pinwheel in this image. I guess a lot of them do when looking at them face on."
Probably.
With other spiral galaxies the "accretion force" by a center mass is perceivable in how their arms are closing in around the middle.
With this one, it looks as if it's loosing its arms instead of pulling them in. Like a lawn sprinkler just starting to spin?

Could it be rotating the other direction? Now there's something I don't know. Do spiral galaxies rotate in one preferred direction?

Quote:

Originally Posted by willik

Very nice looking Galaxy Kevin.
Martin

Thanks Martin!

Placidus (Mike and Trish) · #14 16-09-2018, 08:55 PM

You've done really well. It has a surface brightness of about 15.5, making it 25 times less bright than the Hamburger, 8 times less bright than M83, and somewhat less bright than the notorious NGC 7866.

We call it "Chopin" because if you turn it up the right way, the tips of the multiple spiral arms become a set of fingers playing an arpeggio.

Great work!

cometcatcher (Kevin) · #15 17-09-2018, 11:16 AM

Thanks M&T. NGC 7866?