M31 the Andromeda Galaxy (Andrew Arai)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224

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M31 the Andromeda Galaxy

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M31 the Andromeda Galaxy

This was one planned target on my trip to Arizona where I aimed to get one object per night. I wanted a galaxy and wanted to see how the one shot camera did with regard to native detection of H-alpha and compare with H-alpha acquired through narrow band. I did not do my homework to realize the Andromeda Galaxy actually has relatively small amounts of H-alpha compared with some other large galaxies.

For the final version (A), I accumulated 1.75 hours of RGB data and 1.11 hours of H-alpha, both recorded with the ZWO ASI 2600MC, a one shot color camera. It took me awhile to learn Pixinsight but longer to figure out how to use PixelMath to combine the Red channel and the H-alpha in a reasonable ratio. Based on my limited experience with Pixinsight, I used Photoshop to help with some steps and to add some mild sharpening in the end

I do feel the H-alpha added significantly over RGB alone. You can compare with version B which included only the one shot color RGB data (1,75 hours) and displayed with approximately the same display parameters.

Final
Original
B

B

Description: RGB only

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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	Basic success
Started	...
Astrometry.net job	5049403
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M31 the Andromeda Galaxy

M31 the Andromeda Galaxy

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B

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Image Index:

Contribution Index (beta):

M31 the Andromeda Galaxy

M31 the Andromeda Galaxy

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

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