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| physical object > natural object > celestial body > collection of stars > star cluster > globular cluster > class I globular cluster |
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| class I globular cluster comparison table | |||||||||||||||||||||||||||
| Subject | has purpose | has location | has apparent dimension | has reference | has orbit | has material | is part of | has spectra | has volume | has catalog | has temperature | has number of star | has velocity | is an instance of | has diameter | has momentum | has apparent magnitude | has synonym | has extent | has discovery date | has mass | has image | has distance | has angular momentum | has age | has discoverer | has Messier number |
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| M 75 | originally to catalog all objects which could be confused with a comet | most are in the halo some are members of the thick disk | NED, SIMBAD | elongated, around the galactic center | halo | low abundances of heavy elements | Messier catalog | 105 to 106 | very high | Messier object | 6.0 arc min | 8.5 (V) | NGC 6864 | 1780 | 104 to 106 Msun |  | 57.7 kly | oldest stellar formation in the Galaxy | Pierre Mechain | 75 |
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