Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: RobertM on May 28, 2015, 21:32:39

Title: The Coathanger Asterism
Post by: RobertM on May 28, 2015, 21:32:39
Another from Salcombe, Devon.  Unfinished business from a few years ago this so I'm pleased to have got a half decent go at it.

Capture details:
RH200 Telescope
Sony A7s full spectrum
ISO 2000
IDAS LPS P2 filter
33 x 30s Unguided
HEQ6 with Belt Mod
No darks, flats or bias frames
Processed in Pixinsight

Quarter size:
(https://farm9.staticflickr.com/8838/18019575770_4c6106de9b_b.jpg)

Full resolution: https://farm9.staticflickr.com/8838/18019575770_a07e25a0f5_o.jpg (https://farm9.staticflickr.com/8838/18019575770_a07e25a0f5_o.jpg)
Title: Re: The Coathanger Asterism
Post by: JohnP on May 29, 2015, 07:55:14
very nice ... billions of stars and liking the 'milky' nebulosity... for 30 secs amazing - John
Title: Re: The Coathanger Asterism
Post by: RobertM on May 29, 2015, 20:02:16
Thanks John.  I definitely overdid the colour somewhere so I'm going to redo colour balance using the G2V method and see what happens.
Title: Re: The Coathanger Asterism
Post by: The Thing on May 29, 2015, 20:03:29
Marvelous
Title: Re: The Coathanger Asterism
Post by: Kenny on May 29, 2015, 22:16:13
Brilliant.
Title: Re: The Coathanger Asterism
Post by: RobertM on May 29, 2015, 22:36:48
Ok, this is the G2V calibrated version.  Much happier with this though it still has many warts including a nasty dust bunny.

(https://farm9.staticflickr.com/8811/18240782722_6f07a4eb82_b.jpg)

Half size: https://farm9.staticflickr.com/8811/18240782722_6fa4934092_k.jpg (https://farm9.staticflickr.com/8811/18240782722_6fa4934092_k.jpg)

Robert
Title: Re: The Coathanger Asterism
Post by: Carole on May 29, 2015, 22:44:02
Really like the latest calibrated version, the colours are better and it's got a sort of hazy glow in places.

Carole
Title: Re: The Coathanger Asterism
Post by: JohnP on May 30, 2015, 07:30:20
Superb....
Title: Re: The Coathanger Asterism
Post by: RobertM on May 30, 2015, 10:47:14
Thanks all.

Quote from: Carole on May 29, 2015, 22:44:02
Really like the latest calibrated version, the colours are better and it's got a sort of hazy glow in places.

Carole
Thanks Carole.
I believe there is some faint reflection nebula in the area so maybe that's the hazy glow.
Title: Re: The Coathanger Asterism
Post by: julian on May 30, 2015, 15:07:55
Very nice Robert
Title: Re: The Coathanger Asterism
Post by: RobertM on May 30, 2015, 22:07:58
Thanks all
Title: Re: The Coathanger Asterism
Post by: MarkS on May 31, 2015, 16:53:55
That's looking excellent Robert - though I'm unable to see it full size because ADSL performance at Virgin Media is dire at the moment - some ongoing server issue apparently.  It took 5 attempts just to see the versions you posted inline in the thread.

The G2V calibrated version looks the best but I would have been tempted to boost the saturation a bit. 

Mark
Title: Re: The Coathanger Asterism
Post by: RobertM on May 31, 2015, 21:25:19
Thanks Mark, saturation is something I still need to get to grips with.

Hope your broadband gets sorted quickly.