GCIRS 7 is a red supergiant located in the Galactic Center. It is very bright and is one of the largest stars currently discovered, with a size about 960 solar radii.[2] If placed in our solar system, its photosphere would nearly engulf the orbit of Jupiter.[2]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
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Constellation | Sagittarius |
Right ascension | 17h 45m 39.987s[1] |
Declination | −29° 00′ 22.24″[1] |
Characteristics | |
Evolutionary stage | Red supergiant |
Spectral type | M1I[2] |
Apparent magnitude (J) | 14.197±0.137[1] |
Apparent magnitude (H) | 9.260±0.118[1] |
Apparent magnitude (K) | 6.503±0.017[1] |
J−H color index | 4.937 |
J−K color index | 7.694 |
Details | |
Mass | 20−25[3] M☉ |
Radius | 1,170±60[3] R☉ |
Luminosity | 189,000+42,000 −35,000[2] L☉ |
Surface gravity (log g) | −0.6[4] cgs |
Temperature | 3,600±195,[2] 3,400[5] K |
Metallicity [Fe/H] | −0.02[4] dex |
Age | 6.5 - 10[2] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Constellation of Sagittarius | |
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Bayer | |
Flamsteed | |
Variable |
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HR |
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HD | |
Gliese |
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MOA | |
OGLE |
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PSR |
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WR | |
Other |
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Exoplanets |
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