Andromeda

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Great Nebula in Andromeda · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224 · The star 32And · The star νAnd

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Andromeda

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Andromeda

Our neighbor, the Andromeda galaxy. This is a resolution test for the 1100D/200mm pair. At F/4 the 2x super-resolution seems correct. Color balance is much better in the second version but may lack a bit of saturation. Taken from a Bortle 5~6 sky.

Original
B
C
Final
D

B

Description: Better color balance, but also uses a spatially correlated estimator (MeanMaxReject) which makes the background pattern noticeable in the direction of the drifting. This version also includes Legendre filtering to pre-align the intensities and remove the variations caused by light pollution across the data set.

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C

Description: Raw Image, converted from CR2 to JPEG via DCRAW, to illustrate the bias due to light pollution.

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D

Description: Maintaining an OK-ish color balance but replacing the estimator by the Expectation Maximization algorithm. It does not reject pixels but iteratively weight them all according to the shape of the expected distribution (a Gaussian). The diameter of the stars is well reduced from the MMR version. A very faint H-alpha region is visible in M31 as well as an apparent cluster V[64] 184 and a group of galaxies on the left : UGC 330, UGC 338 and UGC 344. The slight lateral and axial chromatic aberration remains visible as well as the strong chrominance noise. To be corrected in the future.

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	Distinct awarded users	Total awarded images
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
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Other
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	Basic success
Started	...
Astrometry.net job	1412398
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Andromeda

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Andromeda

Andromeda

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Description

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Sky plot

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