Focal Pointe Observatory
Astrophotography by Bob Franke

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UGC 5829 - The Spider Galaxy


       Click the full screen zoom button           ^
     
Click the image to Zoom and Pan              

Click here to view the image without Zoomify (2500 x 2250 - 489 KB)

 

 

Instrument

12.5" RCOS @  ~f/9 (2897 mm fl) 0.64 arcsec / pixel.  The Zoomify image scale is 0.64 to 2.13 arcsec / pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ internal filter wheel, AstroDon Gen II Filters

Acquisition Data

4/1/2011 to 5/6/2011 Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft.  AOL guided

Exposure

Lum 510 min (34 x 15 min, bin 1x1

RGB 450 min (10 x 15 min each, bin 2x2)

Software

CCDSoft, CCDStack, Photoshop CS3, Noel Carboni's actions and Russell Croman's GradientXTerminator.

eXcalibrator 2.0-Beta for (b-v), (v-r) color balancing, using 6 stars from the NOMAD1 database.

PixFix32 (pre-beta) to repair column defects.

CCDStack to calibrate, register, normalize, data reject,  combine the sub exposures, Selective deconvolution and LRGB combine.

PhotoShop for non-linear stretching and LLRGB combine.

Noiseware Pro, a PhotoShop plug-in.

Comment

North is to the top.

The galaxy, UGC 5829, is in the constellation Leo Minor, at a distance of about 40 million light-years from Earth. The highly irregular galaxy is infrequently studied, with only 60 SIMBAD references through 2010. An Internet search returned no professional images specifically targeting the galaxy and only a couple by amateurs. Further stretching the above image reveals about 1400 background galaxies, down to magnitude 22.7, with many fainter visible.