From: "ChrisB" <chboss@hispeed.ch>

Date: August 22, 2012 12:11:20 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: NGC7640

Well done Milton

You seem to get the last bit of performance out of your equipment!

best regards

Chris

--- In Astro_IIDC@yahoogroups.com, "milton_aupperle" <milton@...> wrote:

Hi Folks;

I went after a deep (Mag 11.8) target - NGC 7640 the "Graphite Galaxy" - last night. Seeing and tracking were very good (Guiding 0.32 arc second RMS and Stars FWHM 2.5 to 3.0 Arc seconds). I was shooting 20 min luma subs too. Each image pixel is 0.83 arc seconds.

http://www.outcastsoft.com/Prototype/NGC7640_20120821_MJA.jpg

The only good images of it I have seen are these:

http://www.wheeland.us/galaxy/n7640_gs.htm

http://obsballona.net/coppermine/displayimage.php?pid=210

http://www.astrofoundry.net/Library/NGC_7640.htm

and 

http://www.rdelsol.com/Galaxy/NGC7640.html

all with much larger scopes.

You can just make out the central dust lane that crosses the core and then these bright bluish knots (nebula??) scattered around it. It's an S type barred spiral spiral - but edge on.

If you look carefully, you can see a whole bunch of faint background galaxies (some edge on spirals - others just reddish blobs) too. Most are < 1 arc minute and are in the 15 to 17th magnitude.

It was cloudy today and there is a wave of hazy clouds moving in, so I suspect this will be my last DSO until I get back from vacation.

TTYL ..

Milton Aupperle