2MASS J2126–8140
2MASS J21265040−8140293, also known as 2MASS J2126−8140, is an exoplanet orbiting the red dwarf TYC 9486-927-1, 111.4±0.3 light-years away from Earth. Its estimated mass, age (10-45 million years), spectral type (L3), and Teff (1800 K) are similar to the well-studied planet β Pictoris b. With an estimated distance of around 1 trillion kilometres from its host star, it is one of the largest solar systems ever found.
| Discovery | |
|---|---|
| Discovered by | K. L. Cruz, J. D. Kirkpatrick, A. J. Burgasser |
| Discovery date | 2009 |
Detection method | Direct imaging |
| Orbital characteristics | |
Semi-major axis | 6,900 AU (1.03×1012 km) |
Orbital period (sidereal) | 328,725,000 days (~900,000 years) |
| Star | TYC 9486-927-1 |
| Physical characteristics | |
| Mass | 13.3 (± 1.7) MJ |
| Temperature | ~1,800 K (1,530 °C; 2,780 °F) |
Spectral type | L3.0 |
| 20.72 (G-band) | |
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