Focal Pointe Observatory
Astrophotography by Bob Franke

Home
Recent Images
Galaxies
Nebulae
   Natural Color
   Narrow Band
   H-Alpha
Clusters
Comets
Solar System
Observatory
Equipment
Tips & Tricks
Published Images
My Freeware
Local Weather
Terrestrial

 

Send Email

 

 

 

 

 

 

 

NGC 5905 & 5908


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

Click here to view the image without Zoomify (3006 x 1800, 600 KB)

 

 

Instrument

12.5" RCOS @  ~f/9 (2880 mm fl) 0.64 arcsec / pixel.  The Zoomify image scale is 0.85 to 3.59 arcsec / pixel.

Mount

Paramount ME

Camera

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

Acquisition Data

5/13/2012 to 5/27/2012 Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft.  AOL guided

Exposure

Lum

600.0 min. (20 x 30 min. bin 1x1 -  best of 27)

Red

150.0 min. (10 x 900 sec. bin 2x2)

Green

144.0 min. (10 x 864 sec. bin 2x2)

Blue

158.3 min. (10 x 950 sec. bin 2x2)

Software

  • CCDSoft, CCDStack, Photoshop CS3 w/ the Fits Liberator plugin, Noel Carboni's actions.

  • eXcalibrator v3.1 (g-r) color balancing, using 68 stars from the SDSS-DR8 database.

  • PixFix32 (pre-beta) to repair column defects.

  • CCDBand-Aid (pre-beta) to repair the STL-11000M vertical bars.

  • CCDStack to calibrate, register, normalize, data reject, combine the sub exposures, selective deconvolution and the RGB color image.

  • PhotoShop  none-linear stretching and the LRGB combine.

  • Noiseware Pro, a PhotoShop plug-in.

Comment

North is to the top.
NGC 5905 and NGC 5808, in the constellation Draco, are beautiful examples of spiral galaxies seen from different angles. Their respective distances are 155 and 148 million light-years, with NGC 5905 at the upper-right.  Although they are relatively close to each other, there is no interaction between them.

NGC 5905 has a strong central bar and is a type SBb galaxy. It looks a similar our galaxy, The Milky Way, which is type SBc.

Also in the image are about 2000 cataloged galaxies down to magnitude 22.5 with many more that are not cataloged and even fainter.  There are eight QSO's, with the most distant having a redshift of z = 2.57. Finally there are seven faint galaxy clusters with redshifts of z = 0.41 to 0.56.