MOA-2011-BLG-262L

Artist's impression showing the two models of the MOA-2011-BLG-262L system
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius[1]
Right ascension 18h 00m 23.48s[2]
Declination −31° 14′ 42.93″[2]
Astrometry
Distance~1,800 or ~23,000 ly
(~560 or ~7,200[2] pc)
Details[2]
Mass0.11+0.21
−0.06 or 0.003 M☉
Mass115.2327 or 3.6+2.0
−1.7 MJup
Database references
SIMBADdata

MOA-2011-BLG-262L is an astronomical object of uncertain nature with an orbiting companion, detected through the gravitational microlensing event MOA-2011-BLG-262 in the constellation Sagittarius. Two different models fit the observation equally well - an object of ~3.2 MJ, likely a rogue planet, at a distance of about 0.56 kiloparsecs (1,800 light-years) and orbited by a ~0.47 M🜨 exomoon; or an object of ~0.11 M☉, likely a red dwarf star, at a distance of about 7.2 kiloparsecs (23,000 light-years) in the galactic bulge, and orbited by a ~17 M🜨 planet. The discovery team considers the latter scenario to be more likely, but the former is a better fit.[2][3]

Planetary system

The MOA-2011-BLG-262L planetary system[2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 18+28
−10 or 0.54+0.30
−0.19 M🜨		 0.84+0.25
−0.14 or 0.13+0.06
−0.04		 — — — —

References

  1. ↑ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
  2. 1 2 3 4 5 6 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.
  3. ↑ 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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