trio in Grus

[Shiraz]

heavily cropped to isolate this grouping. All processing was global - great to see how much these galaxies vary.

hi res here http://astrob.in/314288/0/

Not very deep, but nice to have something to post. thanks for looking -
cheers Ray

[rustigsmed]

yep - awesome work Ray, could you fit the fourth in with your field?

[alpal]

Nice picture Ray.

cheers
Allan

[RickS]

Nice to see them a bit close up, Ray! Excellent colour & detail.

[billdan]

Wow that's vivid and electrifying. Great work:thumbsup:

[Ryderscope]

That's a lovely shot Ray. Lots of detail and nice colour in the galaxies.

[strongmanmike]

Great shot of this trio Ray :thumbsup:

Mike

[Placidus]

Ray that's achingly superb! We can see the point of the very low noise chip and short subs letting you pick the moments of good seeing. Excellent acquisition and processing. And it is surprisingly deep - lots of distant galaxy clusters. Wow!

[Slawomir]

Very very nice image Ray :thumbsup:

Is that a planetary nebula at 9 o'clock? Near the two eliptical galaxies right near the left edge? I got a faint glimpse of it in my image as well.

[Stevec35]

Absolutely superb Ray! One of the best shots I've seen of this group.

Cheers

Steve

[multiweb]

Superb colors and details Ray. :thumbsup::thumbsup::thumbsup:

[Atmos]

Very nice Ray! Looks very nice for what could be considered to be a reasonably short integration :)

[cometcatcher]

Amazing how sharp you can get from that 10" F4.

[Camelopardalis]

Stunning Ray :eyepop:

I’m going to have to get me a bigger scope...:lol:

[gregbradley]

A wonderful image Ray.
Greg

[JA]

Way to go Ray and lovely colours :thumbsup:

Best
JA

[Shiraz]

thanks Russ. I took about half the lum with all 4 in the filed, but decided that the trio looked best by itself - then moved it into the field centre, where resolution is slightly better.


thanks Allan!


thanks very much Rick


Thanks Bill. It could even be a bit garish :lol:, but the detail showed up best with lots of saturation.


Thanks very much Rodney!


thanks mike - appreciated


thanks very much M&T - very generous


Thanks Suavi. I hadn't noticed that small object, but it shows up in both of our images - guess it could be a PN, or maybe a distant starburst galaxy with the UV red-shifted into the blue.


Thanks a lot Steve - much appreciated


Hi Marc - thanks for your comments


thanks Colin. it was only a short integration, but I had some pretty dark sky for once - it helps. and it's better than clouds.


Thanks Kevin. all depends on seeing and it wasn't bad for a couple of hours


thanks Dunk. yep, bigger scope is definitely the go :lol:


thanks a lot Greg


thanks very much JA

Cheers Ray

[dpastern]

Lovely shot Ray - very nice detail in the galaxies, especially considering the exposure time!

[Shiraz]

thanks Dave - yep. couldn't have got by on much less data, but had just enough.

[Geoff45]

Well done Ray. What was the reason behind the short exposures? Gettting better resolution? Tracking problems? Other?
Geoff

[atalas]

Very nice Ray :thumbsup:

[Slawomir]

Hi Ray

I looked this object up. It is a galaxy. Below are the coordinates and a bit of info about this galaxy:

Object name: LCRS B231626.6-422158
Co-ordinates: 23h19m11.5s -42d05m33s
Object type: Galaxy
Velocity: 16114 (km/s)
Red shift: 0.053750
Magnitude: 16.13


Cosmology-Corrected Quantities [Ho = 73.00 km/sec/Mpc, Ωmatter = 0.27, Ωvacuum = 0.73]
[Redshift 0.052940 as corrected to the Reference Frame defined by the 3K Microwave Background Radiation]
Luminosity Distance : 226 Mpc (m-M) = 36.77 mag
Angular-Size Distance : 204 Mpc (m-M) = 36.55 mag
Co-Moving Radial Distance : 215 Mpc (m-M) = 36.66 mag
Co-Moving Tangential Dist. : 215 Mpc (m-M) = 36.66 mag
Co-Moving Volume : 0.0417 Gpc^3
Light Travel-Time : 0.684 Gyr
Age at Redshift 0.052940 : 12.615 Gyr
Age of Universe : 13.299 Gyr
Scale (Cosmology Corrected): 990 pc/arcsec = 0.990 kpc/arcsec = 59.41 kpc/arcmin = 3.56 Mpc/degree
Surface Brightness Dimming : Flux Density per Unit Area = 0.81355; Magnitude per Unit Area = 0.224 mag


Since light travel time if about 0.7 Gyr, does it mean that this galaxy is 700 million light years distant, or in order to determine the distance we should look at age at redshift, which would indicate about 12,600 million light years away (this seems way too large though)?

The attached image shows the field of view in Simbad (right) and a crop from my image of this area - I did not want to edit your file :-)

EDIT: I think I got it. It seems that this galaxy is about 700 million light years away.

[Peter Ward]

A tidy image Ray. Nice one :thumbsup:

[Shiraz]

thanks Geoff. resolution - have found that short subs help a bit and they are possible with the ASI1600 due low read noise.


thanks very much Louie


nice work Suavi. I think that the "age at redshift" is how old the universe was when the light started out - guess that the difference between that and 13.299Gy is how long the light has been travelling.


thanks a lot Peter - appreciated.

[marc4darkskies]

That's beautiful Ray! :thumbsup: Great resolution and glorious colour!

[Shiraz]

thanks Marcus! Cheers Ray

[willik]

what a cracker top image and the detail good shot Ray
Martin

[Shiraz]

Thanks Martin. Regards ray

[Paul Haese]

I thought I had commented on this image but it appears not.

Great detail and colour Ray. The image is quite sharp and it is as deep as my image with the RC and an STXL11002.

It's a good demonstration of a discussion here regarding sub lengths. My colour subs were 20 minutes long and the luminance were 30 minutes long. Yours were 1 and 2 minutes. I wonder how much your image would reveal if it were double the exposure.