2MASS J2126-8140

2MASS J21265040−8140293

Exoplanet		List of exoplanets
Parent star
Star		TYC 9486-927-1
Constellation		Octans
Right ascension	(α)	21:25:28.0[1]
Declination	(δ)	-81:38:28[1]
Mass	(m)	0.4[1] M☉
Age		0.027 (± 0.017)[1] Gyr
Physical characteristics
Mass	(m)	13.3 (± 1.7) [1] MJ
Temperature	(T)	~1,800 K (1,530 °C; 2,780 °F)[1]
Orbital elements
Semi-major axis	(a)	6900.0[1] AU
Discovery information
Discovery date		2009 (as a Brown Dwarf), 2016 (as an exoplanet)[1]
Discoverer(s)		K. L. Cruz, J. D. Kirkpatrick, A. J. Burgasser [1][2][3]
Discovery method		Direct imaging
Discovery status		Confirmed

2MASS J21265040−8140293, also known as 2MASS J2126−8140,^[3] is an exoplanet^[3] orbiting the red dwarf star TYC 9486-927-1 (2MASS J21252752-8138278), 24.75 (± 4.25) parsecs away. It has both the longest (~1 million years) and the widest orbit for a planetary mass object known (>4500AU). Its estimated mass, age, spectral type, and T_eff are similar to the well-studied planet β Pictoris b.^[3]

References

1. "Planet 2MASS J2126-8140". exoplanet.eu. Retrieved 2016-01-27.
2. Cruz, K.L.; Kirkpatrick, J.D.; Murphy, S. (2009). "Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5". Astron. J. 137: 3445.
3. N. Deacon, J. Schleider, S. Murphy. "A nearby young M dwarf with a wide, possibly planetary-mass companion". Retrieved 2016-01-27.