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M109 - Barred Spiral Galaxy in Ursa Major

Contains: M 109, NGC 3992

Technical card

Imaging telescope or lens: Planewave CDK 12,5'' 12.5 CDK

Imaging camera: QSI 683 wsg-8 QSI

Software: CCD Autopilot 5

Resolution: 2824x2014

Dates: April 1, 2017

Frames: 42x600"

Integration: 7.0 hours

Avg. Moon age: 4.35 days

Avg. Moon phase: 19.96%

Astrometry.net job: 1522784

RA center: 179.474 degrees

DEC center: 53.379 degrees

Pixel scale: 0.439 arcsec/pixel

Orientation: 128.353 degrees

Field radius: 0.211 degrees

Locations: ImagingInfinity Observatory, Bethune, SC, United States

Description

Here is M109...a barred spiral galaxy in the constellation Ursa Major. M109, at 74.7 million light years distance, is the farthest of all of the 110 objects in Charles Messier's catalog of objects that could be mistaken in the 1700's for comets. It is a huge galaxy...165,000 light years across...nearly double the size of our own Milky Way galaxy. It is a class of galaxy known as a barred spiral, with a very prominent bar spanning its middle and with five massive spiral arms. M109 even has several dwarf companion galaxies caught in its gravitational pull...UGC 6969 seen here at the lower left and UGC 6940 at the lower right. The bright blue star to the right of M109 is SAO 28199, a foreground star within our own galaxy. M109 is receding from us at a rate of over 1000 km per second.

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Author

Hap Griffin
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M109 - Barred Spiral Galaxy in Ursa Major, Hap Griffin