M101 in LRGBHa (Brian Meyerberg)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · Pinwheel galaxy

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M101 in LRGBHa

Revision title: M101 with unsharp mask applied

Powered byPixInsight

M101 in LRGBHa

Revision title: M101 with unsharp mask applied

I'm finally happy with this FLT-91 William Optics scope. I was never happy with the star shapes in the corners. I never realized the focuser was loose on the OTA. This image is the result of tightening the focuser down better and tweaking back-focus. There is still room for back-focus improvement. Here are 2 revisions of M101 a beautiful spiral galaxy, an uncropped version showing the stars out to the edge and a highly cropped version showing the details of the galaxy. this scope has excellent glass.

Capture Details:

June 5 and 6 2022

50x300" Ha
33x180" R
33x180" G
33x180" B
60x120" Lum
35 Darks
60 Flats and 60 Dark Flats
Gain 100 Temp -10c

Original
B
Final
C

B

Title: M101 Highly Cropped

Description: Highly cropped to see the galaxy details.

Uploaded: ...

C

Title: M101 with unsharp mask applied

Description: I wanted to squeeze more detail out of this so I applied unsharp mask process in Pixinsight after removing the stars then putting the stars back in.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	5860127
PixInsight job	PHO6PL4EZQLTUFKI9GVT7PG4R9ZHAO8K
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m06s.39
RA (top/left)	14h04m25s.35
RA (top/right)	14h04m29s.37
RA (bottom/right)	14h01m46s.31
RA (bottom/left)	14h01m44s.11

Dec (center)	+54°21′46″.7
Dec (top/left)	+54°06′43″.6
Dec (top/right)	+54°36′22″.8
Dec (bottom/right)	+54°36′45″.6
Dec (bottom/left)	+54°07′06″.4

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M101 in LRGBHa

Revision title: M101 with unsharp mask applied

M101 in LRGBHa

Revision title: M101 with unsharp mask applied

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M101 in LRGBHa

Revision title: M101 with unsharp mask applied

M101 in LRGBHa

Revision title: M101 with unsharp mask applied

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Acquisition details

Description

Comments

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C

Sky plot

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