GCIRS 7

GCIRS 7
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[citation needed]
J−K color index 7.694[citation needed]
Details
Mass20 – 25[3] M☉
Radius1,170±60[3] R☉
Luminosity189,000+42,000
−35,000[2] L☉
Surface gravity (log g)−0.6[4] cgs
Temperature3,600±195,[2] 3,400[5] K
Metallicity [Fe/H]−0.02[4] dex
Age6.5 – 10[2] Myr
Other designations
GCIRS 7, 2MASS J17454004-2900225[1]
Database references
SIMBADdata

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 1,170 solar radii.[3] If placed in the Solar System, its photosphere would engulf the orbit of Jupiter.

  1. ^ a b c d e f Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference paumard was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference tsuboi was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference carr2000 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference pott was invoked but never defined (see the help page).