M99 (Gary Imm) - AstroBin

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: Coma Pinwheel · M 99 · NGC 4254 · Virgo Cluster Pinwheel

M99

This Messier object is a spiral galaxy located 40 million light years away in the constellation of Coma Berenices at a declination of +14 degrees. It looks face-on to us but that is an April Fools' Day illusion - is actually about halfway between face-on and edge-on.

This is a magnitude 10 galaxy which spans 6 arc-minutes in our apparent view. This corresponds to a diameter of 75,000 light years. It is the 78th brightest galaxy in the sky.

The galaxy structure is asymmetric - one fully formed arm on the bottom balanced by 3 distorted arms on the top. The core is off-center towards the bottom. This is likely the result of interactions with other galaxies in the Virgo Cluster. Many blue star clusters and pink HII regions seen in the galaxy arms. The arms are slightly kinked, indicating the presence of VV rows.

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Description: Comparison to Hubble Image

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ZWO ASI294MM Pro Images
CMOS Imagers
Cloudy Nights
Schmidt-Cassegrain Telescope (SCT) Imagers
Texas Astronomy
Images from the EdgeHD Series

Brightest Galaxy Catalog (Complete)
Messier Catalog (Complete)
Open Galaxy Arms
Three Armed Galaxies
VV Galaxy Rows

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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.

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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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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	5740795
PixInsight job	CE9C2UD8RZACVACFUNRGIZ9BGW7YK72L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h18m49s.517
RA (top/left)	12h19m21s.517
RA (top/right)	12h18m16s.794
RA (bottom/right)	12h18m17s.619
RA (bottom/left)	12h19m22s.275

Dec (center)	+14°25′01″.65
Dec (top/left)	+14°31′22″.79
Dec (top/right)	+14°31′08″.64
Dec (bottom/right)	+14°18′40″.90
Dec (bottom/left)	+14°18′55″.10

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