Astronomy:2MASS J2126−8140

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2MASS J21265040−8140293
Discovery[3]
Discovered byK. L. Cruz, J. D. Kirkpatrick, A. J. Burgasser[1] [2]
Discovery date2009
Direct imaging
Orbital characteristics
6,900[2] AU (1.03×1012 km)
Orbital period328,725,000 days (~900,000 years)
StarTYC 9486-927-1
Physical characteristics
Mean radius1.39±0.19 RJ[4]
Mass13.3±1.7 MJ[3]
4.4±0.42 cgs[4]
Physics1663±135 K[4]
Spectral type
L3.0[5]
Apparent magnitude20.72 (G-band)[5]


2MASS J21265040−8140293, also known as 2MASS J2126−8140,[2] 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 Teff (1800 K) are similar to the well-studied planet β Pictoris b.[2] With an estimated distance of around 1 trillion kilometres from the host star, this is one of the largest solar systems ever found.[7]

See also

References

  1. ↑ Cruz, Kelle L.; Kirkpatrick, J. Davy; Burgasser, Adam J. (2009). "Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5". Astronomical Journal 137 (2): 3445. doi:10.1088/0004-6256/137/2/3345. Bibcode: 2009AJ....137.3345C. 
  2. ↑ 2.0 2.1 2.2 2.3 N. Deacon; J. Schleider; S. Murphy (2016). "A nearby young M dwarf with a wide, possibly planetary-mass companion". Monthly Notices of the Royal Astronomical Society 457 (3): 3191. doi:10.1093/mnras/stw172. Bibcode: 2016MNRAS.457.3191D. 
  3. ↑ 3.0 3.1 "Planet 2MASS J2126-8140". Extrasolar Planets Encyclopaedia. 1995. https://exoplanet.eu/catalog/2m_j2126_81_b--2544/. Retrieved 2016-01-27. 
  4. ↑ 4.0 4.1 4.2 Filippazzo, Joseph C.; Rice, Emily L.; Faherty, Jacqueline; Cruz, Kelle L.; Van Gordon, Mollie M.; Looper, Dagny L. (2015-09-10). "Fundamental Parameters and Spectral Energy Distributions of Young and Field Age Objects with Masses Spanning the Stellar to Planetary Regime". The Astrophysical Journal 810 (2): 158. doi:10.1088/0004-637X/810/2/158. ISSN 1538-4357. 
  5. ↑ 5.0 5.1 Jones, H R A.; Caballero, J. A.; Beamín, J. C.; Barrado, D.; Sarro, L. M.; Marocco, F.; Smart, R. L. (2019), "The Gaia Ultra-Cool Dwarf Sample – II: Structure at the end of the main sequence", Monthly Notices of the Royal Astronomical Society 485 (3): 4423–4440, doi:10.1093/mnras/stz678 
  6. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  7. ↑ "Astronomers find the largest solar system in the galaxy". exoplanets.nasa.gov. February 1, 2016. https://exoplanets.nasa.gov/news/247/astronomers-find-the-largest-solar-system-in-the-galaxy/. Retrieved January 20, 2022. 



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