M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC) (Derek Mellor)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · M 81 · M 82 · NGC 3031 · NGC 3034 · NGC 3077

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M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

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M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

Having imaged M81 and surrounding areas for over 3 years I decided to merge all the data into one image. There is a total of about 45 hours of data acquired in January 2020, January 2021 and February 2023. The same telescope (GT71) was used in all cases but I used ASI1600 mono camera in 2020/2021 and ASI533C (OSC) in 2023. I was not very consistent with my camera angle between the different years so this image is cropped to remove the black space due to camera rotation and sensor size difference. The image is 2X drizzled so pixel scale is 1/2 what you would normally get with my telescope/reducer combination.

Original
Final
B

B

Description: Found more data to add to my composite image. Reprocessed everything from original raw data using WBPP, taking advantage of LN and 2X drizzle.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Unknown

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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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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Status	Advanced success
Started	...
Astrometry.net job	7292541
PixInsight job	36PBM11UTR19817HF6KPGETEJEA4DYTZ
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h56m10s.71
RA (top/left)	10h04m11s.47
RA (top/right)	10h03m42s.32
RA (bottom/right)	09h47m37s.10
RA (bottom/left)	09h49m11s.47

Dec (center)	+69°12′24″.5
Dec (top/left)	+68°27′57″.1
Dec (top/right)	+70°00′24″.0
Dec (bottom/right)	+69°55′20″.6
Dec (bottom/left)	+68°23′14″.7

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M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

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Image Index:

Contribution Index (beta):

M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

M81 - Combination data 2020, 2021 (LRGB) and 2023 (OSC)

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B

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