Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sagittarius [1] |
Right ascension | 18h 00m 23.48s [2] |
Declination | −31° 14′ 42.93″ [2] |
Characteristics | |
Apparent magnitude (K) | 22.3 |
Astrometry | |
Distance | 24,400±3,000 ly (7,490±910 pc) [3] |
Details [3] | |
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. [3] 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] [4] 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. [3]
The system is located 24,400 light-years from Earth, in the constellation Sagittarius. [1] 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. [3]
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 | — | — | — | — |