Messier 3 (M3) Globular Cluster (Douglas J Struble)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: M 3 · NGC 5263 · NGC 5272

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Messier 3 (M3) Globular Cluster

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Messier 3 (M3) Globular Cluster

I decided to take a break from the usual type of deep space objects I work on. We have not had very good skies here in Michigan this spring, so wanted something that didn't take a 100 hours of interrogation time. lol

Messier 3, also known as NGC 5272, is a globular cluster of stars in the northern constellation of Canes Venatici.This cluster is one of the largest and brightest, and is made up of around 500,000 stars. It is estimated to be 11.4 billion years old. It is centered at 32,600 light-years (10.0 kpc) away from Earth.

Messier 3 is quite isolated as it is 31.6 kly (9.7 kpc) above the Galactic plane and roughly 38.8 kly (11.9 kpc) from the center of the Milky Way. It contains 274 known variable stars, by far the most found in any globular cluster. These include 133 RR Lyrae variables, of which about a third display the Blazhko effect of long-period modulation. The overall abundance of elements other than hydrogen and helium, what astronomers term the metallicity, is in the range of −1.34 to −1.50 dex. This value gives the logarithm of the abundance relative to the Sun; the actual proportion is 3.2–4.6% of the solar abundance. Messier 3 is the prototype for the Oosterhoff type I cluster, which is considered "metal-rich". That is, for a globular cluster, Messier 3 has a relatively high abundance of heavier elements.

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Description: Tamed the star cores a bit.

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Status	Basic success
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Astrometry.net job	7818852
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Messier 3 (M3) Globular Cluster

Messier 3 (M3) Globular Cluster

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Messier 3 (M3) Globular Cluster

Messier 3 (M3) Globular Cluster

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