GCIRS 7
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 | M2[1] |
| 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 | |
| Radius | 960±92,[2] 1,000±150[3] R☉ |
| Luminosity | 189,000+42,000 −35,000[2] L☉ |
| Temperature | 3,600±195[2], 3,400[3] K |
| Age | 6.5 - 10[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- "SIMBAD query result: GCIRS 7 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 5 June 2020.
- Paumard, T; Pfuhl, O; Martins, F; Kervella, P; Ott, T; Pott, J-U; Le Bouquin, JB; Breitfelder, J; Gillessen, S; Perrin, G; Burtscher, L; Haubois, X; Brandner, W (2014). "GCIRS 7, a pulsating M1 supergiant at the Galactic centre . Physical properties and age". Astronomy & Astrophysics. 568 (85): A85. arXiv:1406.5320. Bibcode:2014A&A...568A..85P. doi:10.1051/0004-6361/201423991.
- Pott, J.-U.; Eckart, A.; Glindemann, A.; Kraus, S.; Schöde, R.; Ghez, A. M.; Woillez, J.; Weigelt, G. (2008). "First VLTI infrared spectro-interferometry on GCIRS 7". Astronomy & Astrophysics. 487: 413–418. arXiv:0805.4408. Bibcode:2008A&A...487..413P. doi:10.1051/0004-6361:200809829.
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