| NGC5139 / Globular Cluster, type VIII |
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| R.A. | 13h 26m 48.0s (2000.0) |
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| Dec. | -47° 29' 00" (2000.0) |
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| Apparent Size | 36.3' |
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| Real Size | 160 light yrs. |
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| Magnitude | 3.7 |
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| Distance | 16,000 light yrs. |
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The Omega Cluster, NGC5139, is the largest globular cluster in heavens. The apparent size is over half of degree.
But the cluster culminates at only 7 degrees around Tokyo; it needs extremely clear sky to enjoy the splendid cluster at the Northern Hemisphere.
The cluster has the magnitude of 3.7; you can detect it with naked eyes under dark night.
The omega cluster forms the constellation of Centaurus as a star of omega Centauri, registered as a normal star before discovered that it was a globular cluster.
You can resolve individual stars in the outer region only with binoculars, and the view through small scopes should be extremely splendid.
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