Cha 110913−773444

Cha 110913−773444

WISE image centered on the brown dwarf Cha 110913−773444
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Chamaeleon
Right ascension	11^h 09^m 13.63^s[1]
Declination	−77° 34′ 44.6″[1]
Astrometry
Distance	529[1][note 1] ly (162[1] pc)
Details
Mass	8+7 −3[1] MJup
Radius	2.0 or 2.1[2] RJup
Luminosity (bolometric)	0.000603[1][note 2] L☉
Temperature	1300–1400[1] K
Age	0.5–10[1] Myr
Database references
SIMBAD	data

Cha 110913−773444 (sometimes abbreviated Cha 110913) is an astronomical object surrounded by what appears to be a protoplanetary disk. It lies at a distance of 529 light-years from Earth. There is no consensus yet among astronomers whether to classify the object as a sub-brown dwarf (with planets) or a rogue planet (with moons).^[3]

Cha 110913−773444 was discovered in 2004 by Kevin Luhman and others at Pennsylvania State University using the Spitzer Space Telescope and the Hubble Space Telescope, as well as two Earth-bound telescopes in Chile.

See also

• WISEA J120037.79-784508.3, a brown dwarf with a primordial disk
• OTS 44, a rogue planet
• SCR 1845-6357, a binary system with a faint red dwarf and a brown dwarf
• PSO J318.5−22, a rogue planet
• 2MASS J11151597+1937266, a relative nearby planetary-mass object with a disk
• KPNO-Tau 12, a low-mass brown dwarf or planetary-mass object with a disk

References

1. Luhman, K. L; Adame, Lucía; d'Alessio, Paola; Calvet, Nuria; Hartmann, Lee; Megeath, S. T; Fazio, G. G (2005). "Discovery of a Planetary-Mass Brown Dwarf with a Circumstellar Disk". The Astrophysical Journal. 635 (1): L93 – L96. arXiv:astro-ph/0511807. Bibcode:2005ApJ...635L..93L. doi:10.1086/498868. S2CID 11685964.
2. Bonnefoy, M.; Chauvin, G.; Lagrange, A.-M.; Rojo, P.; Allard, F.; Pinte, C.; Dumas, C.; Homeier, D. (2014). "A library of near-infrared integral field spectra of young M-L dwarfs". Astronomy & Astrophysics. 562 (127): A127. arXiv:1306.3709. Bibcode:2014A&A...562A.127B. doi:10.1051/0004-6361/201118270. S2CID 53064211.
3. Whitney Clavin (2005-11-29). "A Planet With Planets? Spitzer Finds Cosmic Oddball". NASA. Archived from the original on 2012-10-11. Retrieved 2006-03-26.

Notes

1. From a distance modulus (μ) of 6.05
2. From the logarithm (log L_bol) of −3.22