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Contains:  M 109, NGC 3992
Getting plate-solving status, please wait...


            Tom Harrison

Technical card

Imaging telescope or lens:RCOS 12.5" Truss

Imaging camera:SBIG STL6303e

Mount:Paramount ME

Guiding telescope or lens:RCOS 12.5" Truss

Guiding camera:SBIG ST-RGH

Software:CCDStackMaxim DLPhotshop Photoshop CS3

Filter:Astrodon Tru-Balance Generation 2

Accessories:PIROff-Axis Guider Homeyer

Resolution: 2085x1672

Dates:May 21, 2015

Frames: 126x600"

Integration: 21.0 hours

Avg. Moon age: 3.45 days

Avg. Moon phase: 12.90% job: 646665

RA center: 179.488 degrees

DEC center: 53.372 degrees

Orientation: 116.101 degrees

Field radius: 0.240 degrees

Locations: Tom Harrison, Fort Davis, Texas, United States


M109 is a beautiful barred spiral galaxy located in the direction of the Constellation Ursa Major, possibly 83 Million Light-Years distant, and is the most distant of the Messier Catalog objects and the brightest member of the M109 Group of some 50 galaxies. Three surrounding smaller galaxies may possibly be satellite galaxies of M109. The processing of M109 is made challenging due to the striations of light coming from nearby Phecda, a big dipper bowl star shining at magnitude 2.6. Object: M109 Distance: ~83mly Magnitude: 9.8 Date: May 2015 Place: Fort Davis, TX Exposure Details: LRGB:590:170:200:300 unbinned Processing: MaxIm DL, CCDStack, PixInsight, Regim, Photoshop CC Optics: 12.5" RCOS Truss Focal Length: 2808mm @ f9 Mount: Paramount ME Robotic GEM Camera: SBIG STL6303E Focuser: RCOS Guiding: SBIG RGH off-axis Filters: Tru-Balance LRGB GenII 2"



Tom Harrison
License: Attribution Creative Commons


  • M109, 


            Tom Harrison
  • Final


            Tom Harrison

Sky plot

Sky plot




            Tom Harrison