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]

GCIRS 7

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Sagittarius
Right ascension	17^h 45^m 39.987^s[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	17[3] M☉
Radius	960±92,[2] 1,000±150[4] R☉
Luminosity	189,000+42,000 −35,000[2] L☉
Surface gravity (log g)	-0.6[3] cgs
Temperature	3,600±195[2], 3,400[4] K
Metallicity [Fe/H]	-0.02[3] dex
Age	6.5 - 10[2] Myr
Other designations
GCIRS 7, 2MASS J17454004-2900225[1]
Database references
SIMBAD	data

References

1. "SIMBAD query result: GCIRS 7 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 5 June 2020.
2. 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.
3. . Bibcode:2000ApJ...530..307C. Cite journal requires |journal= (help); Missing or empty |title= (help)
4. 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.