G1 (Mayall II) (Gary Imm)

Celestial hemisphere: Northern · Constellation: Andromeda (And)

G1 (Mayall II)

This extragalactic globular cluster, also known as Mayall II, is located 2.5 million light years away in the constellation of Andromeda at a declination of +40 degrees. It is a magnitude 13.8 cluster which spans 25 arc-seconds in our apparent view. This corresponds to a diameter of 300 light years.

G1 is the brightest of 500+ globular clusters that have been identified so far as belonging to the Andromeda Galaxy (M31), which is located off image about 2.5 degrees to the northeast (upper left). G1 is located about 120,000 light years from the galactic center of M31. In Revision F, I have attached an image with the top 10 brightest clusters (after G1) identified in the near vicinity of M31.

Discovered by American astronomers Mayall and Eggen in 1953 using the Palomar 48 inch telescope, G1 is believed to have twice the mass of Omega Centauri.

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F

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F

Description: The top 10 brightest clusters (after G1) identified in the near vicinity of M31.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	5378165
PixInsight job	2ZE7L8OB7O0B6YAF1CCQ8FL96NDM2LAL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h32m46s.597
RA (top/left)	00h33m46s.400
RA (top/right)	00h31m46s.176
RA (bottom/right)	00h31m47s.110
RA (bottom/left)	00h33m46s.801

Dec (center)	+39°34′39″.54
Dec (top/left)	+39°42′24″.24
Dec (top/right)	+39°42′13″.57
Dec (bottom/right)	+39°26′52″.71
Dec (bottom/left)	+39°27′03″.26

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G1 (Mayall II)

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