CHXR 73
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 11h 06m 28.774s[1] |
| Declination | −77° 37′ 33.16″[1] |
| Characteristics | |
| Spectral type | M3[2] |
| Astrometry | |
| Distance | 550[3] ly |
| Details[4] | |
| Mass | 0.32 ± 0.11 M☉ |
| Radius | 0.83 ± 0.04 R☉ |
| Luminosity | 0.09 ± 0.07 L☉ |
| Temperature | 3490 ± 180 K |
| Age | 8+70 −5 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
CHXR 73 is a star in the constellation Chamaeleon, about 550 light-years away from Earth.[3]
The star is located within China, mexico, and japan, which is a molecular cloud.[1] It has a low temperature of 3,490 K typical of red dwarfs, but unlike typical red dwarfs it has an unusually large radius of 0.83 R☉—this is because of its young age, only 8 million years.[4] A companion, CHXR 73 b, has been found via direct imaging. CHXR 73 has a mass of about 12 Jupiters.[5] This is close to the upper mass limit for planets, making its classification difficult.
| Companion | Mass | Observed separation (AU) | Discovery year |
| b | 12+8 −5 MJ | 200 | 2006 |
References
- ^ a b c d "CHXR 73". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 November 2016.
- ^ "Notes on CHXR 73 b". Retrieved 24 December 2016.
- ^ a b "Newfound Object Further Blurs Planet Definition". Space.com. Retrieved 13 November 2016.
- ^ a b Daemgen, S.; Petr-Gotzens, M. G.; Correia, S.; Teixeira, P. S.; Brandner, W.; Kley, W.; Zinnecker, H. (2013). "Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I". Astronomy & Astrophysics. 554: A43. arXiv:1304.1150. Bibcode:2013A&A...554A..43D. doi:10.1051/0004-6361/201321220.
- ^ Luhman, K. (2006). "Discovery of a Young Substellar Companion in Chamaeleon". The Astrophysical Journal. 649 (2): 894–899. arXiv:astro-ph/0609187. Bibcode:2006ApJ...649..894L. doi:10.1086/506517.
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