Astronomy:MOA-2011-BLG-262L
MOA-2011-BLG-262L is a red dwarf with an orbiting exoplanet, both detected through the gravitational microlensing event MOA-2011-BLG-262.[1] It was once believed to be either an exoplanet with 3.2 times the mass of Jupiter and a exomoon with 0.47 times Earth's mass or a red dwarf with a mass of 0.11 solar masses orbited by a ~17 M🜨 planet,[2][3] but the latter scenario was confirmed in 2024 based on observations of the host star by the Keck telescope, 10 years after the ending of the microlensing event.[1]
The system is located 24,400 light-years from Earth, in the constellation Sagittarius.[4] The host star is a red dwarf, with 19% the Sun's mass and a faint apparent magnitude of 22.3 in the K-band. It has a transverse velocity of 541.3±65.75 km/s, the highest ever found for any star with a known exoplanet.[1]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 28.92±4.75 M⊕ | 0.98+0.56 −0.20 |
— | — | — | — |
References
- ↑ 1.0 1.1 1.2 1.3 Terry, Sean K.; Beaulieu, Jean-Philippe; Bennett, David P.; Bhattacharya, Aparna; Hulberg, Jon; Huston, Macy J.; Koshimoto, Naoki; Blackman, Joshua W. et al. (2024-10-11). "A Candidate High-velocity Exoplanet System in the Galactic Bulge" (in en). The Astronomical Journal 169 (3): 131. doi:10.3847/1538-3881/ad9b0f. ISSN 0004-6256. Bibcode: 2025AJ....169..131T.
- ↑ Bennett, D.P. et al. (13 December 2013). "A Sub-Earth-Mass Moon Orbiting a Gas Giant Primary or a High Velocity Planetary System in the Galactic Bulge". The Astrophysical Journal 785 (2): 155. doi:10.1088/0004-637X/785/2/155. Bibcode: 2014ApJ...785..155B.
- ↑ Clavin, Whitney (10 April 2014). "Faraway Moon or Faint Star? Possible Exomoon Found". NASA. https://www.jpl.nasa.gov/news/faraway-moon-or-faint-star-possible-exomoon-found.
- ↑ Cite error: Invalid
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