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) | |
|---|---|
| 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 | |
|---|---|
| Bayer | |
| Flamsteed | |
| Variable |
|
| HR |
|
| HD | |
| Gliese |
|
| MOA | |
| OGLE |
|
| PSR |
|
| WR | |
| Other |
|
| Exoplanets |
|