| Characteristics | |
|---|---|
| Apparent magnitude (K) | 22.3 |
| Observation data Epoch J2000 Equinox J2000 | |
| Constellation | Sagittarius |
| Right ascension | 18 00 23.48 |
| Declination | −31° 14′ 42.93″ |
| Astrometry | |
| Distance | 24,400±3,000 ly (7,490±910 pc) |
| Details | |
| Mass | 0.193±0.029 M☉ |
| Database references | |
| SIMBAD | data |
MOA-2011-BLG-262L is a red dwarf with an orbiting exoplanet, both detected through the gravitational microlensing event MOA-2011-BLG-262. 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, 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.
The system is located 24,400 light-years from Earth, in the constellation Sagittarius. 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.
| 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
- ^ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
- ^ Bennett, D.P.; Batista, V.; 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. arXiv:1312.3951. Bibcode:2014ApJ...785..155B. doi:10.1088/0004-637X/785/2/155. S2CID 118327512.
- ^ Terry, Sean K.; Beaulieu, Jean-Philippe; Bennett, David P.; Bhattacharya, Aparna; Hulberg, Jon; Huston, Macy J.; Koshimoto, Naoki; Blackman, Joshua W.; Bond, Ian A. (2024-10-11). "A Candidate High-Velocity Exoplanet System in the Galactic Bulge". arXiv:2410.09147.
- Clavin, Whitney (10 April 2014). "Faraway Moon or Faint Star? Possible Exomoon Found". NASA. Archived from the original on 12 April 2014. Retrieved 19 February 2023.
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