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Contains:  M 108, NGC 3556
Getting plate-solving status, please wait...
M108 revisited, 


            Frank Colosimo
M108 revisited

M108 revisited

Technical card

Resolution: 3007x2125

Dates:March 10, 2019

Frames: 115x600"

Integration: 19.2 hours

Avg. Moon age: 3.52 days

Avg. Moon phase: 13.40% job: 2593882

RA center: 167.865 degrees

DEC center: 55.669 degrees

Pixel scale: 0.440 arcsec/pixel

Orientation: 7.661 degrees

Field radius: 0.225 degrees

Locations: Blue Mountain Vista Observatories, New Ringgold, Pennsylvania, United States

Data source: Backyard


Messier 108 (M108, NGC 3556) is an edge-on spiral galaxy in Ursa Major situated near the bright star Beta Ursa Majoris and close to the Owl Nebula, M97, only 48' away. It has a visual magnitude 10. It is about 45 million light years away and is a member of the Ursa Major group, a rather loose collection of galaxies.
The nearly edge-on galaxy appears to have no bulge and no pronounced core at all. The dust lane, H2 regions, and star clusters provide a jumbled and chaotic appearance, but show a lot of resolved detail. This is my second attempt at this object. I think I have a wider field and better color but possibly not the resolution of my last attempt.

Date: Jan-Mar 2019
Location: New Ringgold PA
Optics: LUM: Starizona Hyperion f/8 12.5 inch, FL 2540 mm
Mount: LUM: Paramount ME
Camera: LUM: Apogee U8300
Guiding: ST-402 on Innovations Foresight On-Axis Guider

Optics: RGB: Celestron EdgeHD 1100
Mount: RGB: Paramount MX
Camera: RGB:Sbig STL-11000

Exposure: LRGB (unbinned): L:69x10 R:20x10 min, G:6x10 min, B:20x10 min Total 19.2 hrs 115 subs at avg 600 sec
Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim DL with subsequent processing with Photoshop.



Frank Colosimo
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


M108 revisited, 


            Frank Colosimo