Messier 71
Globular cluster in the constellation Sagitta
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Summary
Messier 71 is a globular cluster[1]. It draws 527 Wikipedia views per month (globular cluster category, ranking #14 of 58).[2]
Key Facts
- Discoverer or inventor: Jean-Philippe de Cheseaux[3]
- Constellation: Sagitta[4]
- Spectral class: X-XI[5]
- Part of: Milky Way[6]
- Commons category: Messier 71[7]
- Catalog code: M 71[8], NGC 6838[9], CSI+18-19515[10], GCRV 12241[11], GCl 115[12], Collinder 409[13], Melotte 226[14], C 1951+186[15], [KPS2012] MWSC 3200[16]
- Time of discovery or invention: 1745[17]
- Topic's main category: Category:Messier 71[18]
- Commons gallery: Messier 71[19]
- Apparent magnitude: 6.1[20], 7.91[21], 4.78[22], 7.973[23]
- Absolute magnitude: -5.61[24]
- Radius: 14 light-year[25]
- Radial velocity: -22.8 kilometre per second[26], -80.0 kilometre per second[27], -16.9 kilometre per second[28]
- Metallicity: -0.78[29], -0.81[30]
- Distance from Earth: 13,000 light-year[31], 0.004 megaparsec[32]
- Right ascension: 298.443708 degree[33]
- Declination: 18.779194 degree[34]
- Epoch: J2000.0[35]
- Declination component of proper motion: -5.100 milliarcsecond per year[36], -3.93 milliarcsecond per year[37]
- Right ascension component of proper motion: -2.300 milliarcsecond per year[38], -0.16 milliarcsecond per year[39]
Why It Matters
Messier 71 has Wikipedia articles in 26 language editions, a strong signal of global cultural recognition.[40] It is known by 13 alternative names across languages and contexts.[41]