2MASS J2126−8140

2MASS J21265040−8140293, also known as 2MASS J2126−8140,^[3] is an exoplanet orbiting the red dwarf TYC 9486-927-1, 111.4±0.3^[6] light-years away from Earth. Its estimated mass, age (10-45 million years), spectral type (L3), and T_eff (1800 K) are similar to the well-studied planet β Pictoris b.^[3] With an estimated distance of around 1 trillion kilometres from the host star, this is one of the largest solar systems ever found.^[7]

2MASS J21265040−8140293

Discovery[1]
Discovered by	K. L. Cruz, J. D. Kirkpatrick, A. J. Burgasser[2] [3]
Discovery date	2009
Detection method	Direct imaging
Orbital characteristics
Semi-major axis	6,900[3] AU (1.03×1012 km)
Orbital period (sidereal)	328,725,000 days (~900,000 years)
Star	TYC 9486-927-1
Physical characteristics
Mean radius	1.39±0.19 RJ[4]
Mass	13.3±1.7 MJ[1]
Surface gravity	4.4±0.42 cgs[4]
Temperature	1663±135 K[4]
Spectral type	L3.0[5]
Apparent magnitude	20.72 (G-band)[5]

See also

• COCONUTS-2b
• Gliese 900