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Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagittarius
Right ascension 18h 08m 04s[1]
Declination −27° 09′ 00″[1]
Distance2300−400+700[2] ly
(700−120+210[2][3] pc)
Mass0.060+0.028−0.021[3] M
Database references

MOA-2007-BLG-192L is a low-mass red dwarf star or brown dwarf, approximately 3,000 light-years away in the constellation of Sagittarius. It is estimated to have a mass approximately 6% of the Sun's.[3] In 2008, an Earth-sized extrasolar planet was announced to be orbiting this object.[4]

Planetary system[edit]

The discovery of a planet, MOA-2007-BLG-192Lb, orbiting this object was announced on June 2, 2008.[4] This planet, with a mass of approximately 3.3 times that of Earth, is one of the smallest known extrasolar planets. It was found when it caused a gravitational microlensing event on the night of May 24, 2007, which was detected as part of the MOA-II gravitational microlensing survey at the Mount John University Observatory in New Zealand.[3]

The MOA-2007-BLG-192L system
Companion MassObserved separation
b3.3+4.9−1.6[3] M0.62+0.22−0.16[3]

See also[edit]


  1. ^ a b "Notes for star MOA-2007-BLG-192-L". The Extrasolar Planets Encyclopaedia. Archived from the original on 2008-09-26. Retrieved 2008-06-16.
  2. ^ a b "Notes for Star MOA-2007-BLG-192L". Extrasolar Planets Encyclopaedia. Archived from the original on 26 September 2008. Retrieved 29 February 2012.
  3. ^ a b c d e f Table 3, Bennett, D. P.; Bond, I. A.; Udalski, A.; Sumi, T.; Abe, F.; Fukui, A.; Furusawa, K.; Hearnshaw, J. B.; et al. (2008). "A Low‐Mass Planet with a Possible Sub‐Stellar‐Mass Host in Microlensing Event MOA‐2007‐BLG‐192". The Astrophysical Journal. 684: 663–683. arXiv:0806.0025. Bibcode:2008ApJ...684..663B. doi:10.1086/589940.
  4. ^ a b MOA-2007-BLG-192Lb: A Low-Mass Planet with a Possible Sub-Stellar-Mass Host Archived 2008-06-06 at the Wayback Machine., David P. Bennett. Accessed on line July 3, 2008.

External links[edit]

Coordinates: Sky map 18h 08m 04s, −27° 09′ 00″