Print Page - M57 Ring Nebula at DSC

Title: M57 Ring Nebula at DSC
Post by: MarkS on May 25, 2009, 19:26:47

Most of us observed M57 visually at DSC - well here is the image.

32 x 5min exposures. Modified Canon 350D on Celestron C11 with F6.3 reducer and using CLS filter. Guided on an EQ6 using a 300mm lens with x2 converter and modified Toucam. This is a crop of the stacked image - it has not been scaled.

(http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/ring220509.jpg)

I've also produced an extremely stretched version of the same data which just begins to show another ring encircling the main one:
http://gallery.orpington-astronomy.org.uk/albums/userpics/10046/ring220509stretched.jpg

Mark

Title: Re: M57 Ring Nebula at DSC
Post by: Mike on May 25, 2009, 19:29:27

Wow! Nice image Mark. Lovely detail you've got there.

Title: Re: M57 Ring Nebula at DSC
Post by: mickw on May 25, 2009, 19:36:50

That's good, very nice

Title: Re: M57 Ring Nebula at DSC
Post by: Jim on May 25, 2009, 19:39:16

Lovely Mark. There's a nice spiral in your stretched image. Is it IC1296?

Title: Re: M57 Ring Nebula at DSC
Post by: JohnP on May 25, 2009, 19:46:56

Yep very nice Mark.... Spiral galaxy looks excellent in stretched image & outer halo showing nicely as well. Well done! Stars a little elongated - Is that guiding issues...?

Very good though - John

Title: Re: M57 Ring Nebula at DSC
Post by: MarkS on May 25, 2009, 20:02:58

Yes, Jim - it's IC1296

John, yes the stars are a little elongated. Examining the inter-frame drift on the subs it looks to me like some kind of flexure issue. But I don't know where.

Mark

Title: Re: M57 Ring Nebula at DSC
Post by: Fay on May 25, 2009, 20:11:30

Very nice, Mark, great colours!

Title: Re: M57 Ring Nebula at DSC
Post by: JohnP on May 25, 2009, 20:39:23

Quoteit looks to me like some kind of flexure issue

Oh dear the dreaded flexure strikes again...!!!!

Title: Re: M57 Ring Nebula at DSC
Post by: Mac on May 25, 2009, 21:39:06

very nice

Title: Re: M57 Ring Nebula at DSC
Post by: Rocket Pooch on May 26, 2009, 08:17:36

Very colourfull, gave you run a decon on it?

Title: Re: M57 Ring Nebula at DSC
Post by: RobertM on May 26, 2009, 08:31:17

That's very nice Mark and tremendous for a DSLR. As Chris has mentioned a small amount of deconvolution should bring out a little more detail.

Title: Re: M57 Ring Nebula at DSC
Post by: MarkS on May 26, 2009, 21:50:10

That is the decon version - I can't extract any more detail from it. I'm pretty pleased with the result given what a small object it is.

Mark

Title: Re: M57 Ring Nebula at DSC
Post by: The Thing on May 27, 2009, 11:03:04

Superb, I am going to use it as a benchmark for reprocessing mine. I haven't got colour in the same places as you but it's there in the RAW files. Another go, other hour :}

Title: Re: M57 Ring Nebula at DSC
Post by: Mike on May 27, 2009, 11:12:15

To be able to see both central stars is amazing.

Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on May 25, 2009, 19:26:47