M81 & M82 HaLRGB (Gary Seven)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · Cigar Galaxy · HD85161 · HD85458 · HD85533 · M 81 · M 82 · NGC 3031 · NGC 3034

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M81 & M82 HaLRGB

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M81 & M82 HaLRGB

Perhaps this is the first published image using an Agema SD-150 refractor, an aspherized 150mm f/8 fluorite doublet. Agema has not yet released the matching field flattener so I used an APM Riccardi 0.75x Reducer to shoot at 900mm. At the same time, I also implemented the Octopi Astro tilt adjuster. I have struggled a bit with the Octopi, though this is probably due to user error and trying to achieve a level of accuracy that is not realistic for my sky conditions.

Processing was a bit of a struggle. The IFN was picked up well, but bringing it up created too much of "glowy" effect on the galaxies. And really, the galaxies are the story of the image. There are other regions of the sky where I can get better IFN shots. Nevertheless, I may go back and try MaskedStretch and blend it with a GHS or STF stretch as MaskedStretch removes so much contrast from the galaxies.

Original
Final
B

ZWO ASI2600MM Pro
Cloudy Nights
Mac Users Group
N.I.N.A. Users
Arizona Astrophotographers

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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.

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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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	9359682
PixInsight job	LVKUIH80LFR9EY6NHB90NQV5WYX6F3MU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h55m45s.224
RA (top/left)	10h00m20s.684
RA (top/right)	10h02m10s.800
RA (bottom/right)	09h50m49s.160
RA (bottom/left)	09h49m43s.713

Dec (center)	+69°20′21″.35
Dec (top/left)	+68°34′03″.47
Dec (top/right)	+70°00′51″.40
Dec (bottom/right)	+70°06′12″.91
Dec (bottom/left)	+68°38′59″.99

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M81 & M82 HaLRGB

M81 & M82 HaLRGB

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M81 & M82 HaLRGB

M81 & M82 HaLRGB

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