Messier 109 - HαRGB (Rainer Raupach)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 109 · NGC 3992 · PGC 2433784 · PGC 2434355 · PGC 2436214 · PGC 2437949 · PGC 2438133 · PGC 2438633 · PGC 2438683 · PGC 2442676 · PGC 2443807 · PGC 2444216 · PGC 2444393 · PGC 2832093 · PGC 2832094 · PGC 2832095 · PGC 2832098 · PGC 37553 · PGC 37621 · PGC 37700

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Messier 109 - HαRGB

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Messier 109 - HαRGB

Messier 109 is a barred spiral galaxy at a distance of approximately 84 Mio.Lyrs. It's surface brightness outside the central region is relatively low. A composite of one-shot RGB and Hα narrow band data with continuum subtraction!

The galaxy shows regularly distributed H-I regions inside the disc, however, there is a H-I hole in the bar. This is revealed by the added H-alpha information.

M109 is located very close to the bright stars of the constellation of Ursa Major (Phecda with 2.4mag). The full field of view shows this nice contrast between the faint galaxy and the bright foreground star.

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Description: The full APS-C field of view showing also the bright star Phecda (UMa) in the NW corner.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5597259
PixInsight job	G5W7AQMZECH2R12PK0QWP7FC0M431Q96
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h57m38s.549
RA (top/left)	12h00m08s.730
RA (top/right)	11h55m06s.197
RA (bottom/right)	11h55m11s.860
RA (bottom/left)	12h00m09s.175

Dec (center)	+53°19′42″.22
Dec (top/left)	+53°34′53″.57
Dec (top/right)	+53°34′13″.13
Dec (bottom/right)	+53°04′21″.99
Dec (bottom/left)	+53°05′00″.71

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Messier 109 - HαRGB

Messier 109 - HαRGB

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Messier 109 - HαRGB

Messier 109 - HαRGB

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