M101 / NGC5457 (Stefano Zamblera)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122471 · HD122545 · HD122865 · M 101 · NGC 5422 · NGC 5443 · 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 · Pinwheel galaxy

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M101 / NGC5457

Link: https://www.xiulong.it/tianwensheying/2023/05/25/m101-ngc5457-2/

Powered byPixInsight

M101 / NGC5457

Link: https://www.xiulong.it/tianwensheying/2023/05/25/m101-ngc5457-2/

In this workflow I used Ha narrowband as integration for Luminance and Red channel, and Oiii narrowband master as integration for Green and Blue channel as according to Kayron Mercieca, cfr.: https://www.lightvortexastronomy.com/tutorial-combining-lrgb-with-narrowband.html
Approved subframes detailed list (PixInSight weighted) available here: https://www.xiulong.it/tianwensheying/wp-content/uploads/2023/05/M101-framelist.xlsx
below resumed gathered by filter, all by Astronomic, recorded between 28/10/2021 and 25/04/2023.
Ha: 226 x 180" -20C: 141 gain 139, 85 gain 173
Oiii: 159 x 180" -20C: 94 gain 139, 65 gain 173
L: 636 x 60" -20C: 553 gain 139, 83 gain 173
G: 532 x 60" -20C: 373 gain 139, 159 gain 173
B: 500 x 60" -20C: 298 gain 139, 202 gain 173
R: 614 x 60" -20C: 438 gain 139, 176 gain 173

Final
Original
B
C

B

Title: M101 / NGC5457 wide field

Description: M101 / NGC5457 wide field

Uploaded: ...

C

Title: M101 / NGC5457 wide field, annotations

Description: M101 / NGC5457 wide field, annotations by PixInSight

Uploaded: ...

ZWO ASI1600MM/QHY163M
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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.

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Status	Advanced success
Started	...
Astrometry.net job	7773744
PixInsight job	9M9TDW6KRETI31I3SGLM7HQHURI9WF6T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h02m21s.71
RA (top/left)	14h11m22s.83
RA (top/right)	14h03m32s.35
RA (bottom/right)	13h53m04s.17
RA (bottom/left)	14h01m16s.30

Dec (center)	+54°37′13″.8
Dec (top/left)	+53°59′24″.7
Dec (top/right)	+56°04′06″.8
Dec (bottom/right)	+55°12′27″.2
Dec (bottom/left)	+53°10′17″.4

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M101 / NGC5457

M101 / NGC5457

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M101 / NGC5457

M101 / NGC5457

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