Pinwheel Galaxy - M 101 (Georg G Albrecht)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122007 · HD122149 · HD122471 · HD122545 · HD122865 · HD123518 · M 101 · NGC 5422 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · NGC 5473 · NGC 5474 · NGC 5477 · NGC 5484 · NGC 5485 · NGC 5486 · Pinwheel galaxy

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Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

Powered byPixInsight

Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

The Pinwheel Galaxy was discovered by Pierre Méchain in 1781 and communicated to Messier who confirmed it's position for inclusion in the Messier catalog as one of its final entries - M 101. The galaxy is approximately 21 million light years away from earth. It's diameter expands to 170,000 light years, almost twice the size of our own galaxy. However the computed mass indicates 16 billion stars, only 10% of the estimated mass of our galaxy. M 101, a face-on type Sc galaxy is located in the constellation of Ursa Major 5.5° east from Mizar (Zeta U. Maj).

Unfortunately I was not able to eliminate all the walking noise out of the image. I am still tracking only and my mount had some difficulties I tried to address before the second night I imaged M 101. My little guiding scope I am using for imaging is doing it's best.

Original
Final
C

C

Title: Pinwheel Galaxy - M 101 - Revisited

Description: Stacked and processed old date in Pixinsight from scratch. WBPP, used B/N/SXTerminator and GHS for stretching.
The data is very noisy (walking noise) due to imaging without guiding at the time. Still, I was able to improve the image quality by quite a bit.

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Status	Advanced success
Started	...
Astrometry.net job	7405879
PixInsight job	9VCIKBHO7H5KJ567T92UPDJW275Q6E6T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m01s.36
RA (top/left)	14h08m27s.19
RA (top/right)	14h08m54s.89
RA (bottom/right)	13h57m16s.48
RA (bottom/left)	13h57m27s.17

Dec (center)	+54°21′40″.2
Dec (top/left)	+53°09′55″.8
Dec (top/right)	+55°31′24″.9
Dec (bottom/right)	+55°32′16″.8
Dec (bottom/left)	+53°10′47″.0

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Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

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Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

Pinwheel Galaxy - M 101

Revision title: Pinwheel Galaxy - M 101 - Revisited

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