2MASS J21265040−8140293 or 2MASS J2126−8140 [2] is an exoplanet [2] in the orbit of the red dwarf TYC 9486-927-1 (2MASS J21252752-8138278).
| 2MASS J21265040−8140293 | |
|---|---|
| Exoplanet | |
| Parent star | |
| Star | TYC 9486-927-1 |
| Constellation | Octant |
| Right Ascension ( α ) | 21: 25: 28.0 [1] |
| Declination ( δ ) | -81: 38: 28 [1] |
| Distance | St. years (24.75 (± 4.25) [1] pc ) |
| Age | 0.027 ± 0.017) [1] billion years |
| Elements of the orbit | |
| Semimajor axis ( a ) | 6900.0 [1] a. e. |
| physical characteristics | |
| Weight ( m ) | 13.3 (± 1.7) [2] M J |
| Radius ( r ) | ? R j |
| Temperature ( T ) | ~ 1800 [1] K |
| Discovery Information | |
| opening date | 2009 (like a brown dwarf ), 2016 (like an exoplanet) [1] |
| Discoverer (s) | KL Cruz, JD Kirkpatrick, AJ Burgasser [1] [3] [2] |
| Detection method | Direct observation |
| Opening status | Confirmed |
It is located in 24.75 (± 4.25) parsecs from the Sun. It has both the longest (~ 1 Ma) orbital period and the widest orbit among the known objects of planetary mass (> 4500 AU ). In terms of calculated mass, age, spectral type, and T eff, it is similar to the well-studied planet Beta Painter b ( en: Beta Pictoris b ) [2] .
Notes
- ↑ 1 2 3 4 5 6 7 8 Planet 2MASS J2126-8140 unspecified (inaccessible link - history ) . exoplanet.eu . Date of treatment January 27, 2016.
- ↑ 1 2 3 4 5 A nearby young M dwarf with a wide, possibly planetary-mass companion . Date of treatment January 27, 2016.
- ↑ Cruz, KL; Kirkpatrick, JD; Murphy, S. Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5 // Astron. J.: journal. - 2009. - Vol. 137 , no. 2 . - P. 3345–3357 . - DOI : 10.1088 / 0004-6256 / 137/2/3345 . - .