This article relies largely or entirely on a
single source. (January 2023) |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sagittarius |
Right ascension | 17h 45m 16.1s [2] |
Declination | −28° 49′ 09″ [2] |
Characteristics | |
Evolutionary stage | Wolf-Rayet |
Spectral type | Ofpe/WN9 [2] |
Astrometry | |
Distance | 8,000 [2] pc |
Details | |
Radius | 79 [2] R☉ |
Luminosity | 2,399,000 [2] L☉ |
Temperature | 20,000 [2] K |
Other designations | |
WR 101-2, CXOGC J174516.1-284909 | |
Database references | |
SIMBAD | data |
WR 101-2, also known as CXOGC J174516.1-284909, is a Wolf-Rayet star located in the Galactic Center, about 8,000 pc away from Earth. Its size has been estimated at 79 R☉. [2]
WR 101-2's spectral type is Ofpe/WN9, [2] signifying it as being a slash star, a Wolf-Rayet star which in this case contains extra nitrogen and helium emission in its spectrum as well as a P Cygni profile. Assuming a distance of 8,000 pc (appropriate as the massive star is apparently located in the Galactic Center, a structure known to be about 8,000 pc away), a K-band magnitude of 7.89, a K-band extinction of 1.7, and a K-band bolometric correction of -2.9, the luminosity turns out to be 2.4 million times that of the Sun (Log(L) = 6.38), making it one of the brightest stars known and certainly in the Galactic Center. [2]
WR 101-2's effective temperature was estimated to be about 20,000 K, [2] one of the coolest for any Wolf-Rayet star. The resulting radius for this is 129 R☉.