MOA-2007-BLG-192L
MOA-2007-BLG-192L & MOA-2007-BLG-192Lb |
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| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 08m 04s[1] |
| Declination | −27° 09′ 00″[1] |
| Astrometry | |
| Distance | 3000±1000 ly (1000±400[2] pc) |
| Details | |
| Mass | 0.060+0.028−0.021[2] M☉ |
| Database references | |
| SIMBAD | data |
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.[2] In 2008, an Earth-sized extrasolar planet was announced to be orbiting this object.[3]
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[edit] Planetary system
The discovery of a planet, MOA-2007-BLG-192Lb, orbiting this object was announced on June 2, 2008.[3] 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.[2]
| Companion | Mass | Observed separation (AU) |
| b | 3.3+4.9−1.6[2] M⊕ | 0.62+0.22−0.16[2] |
[edit] See also
[edit] References
- ^ a b "Notes for star MOA-2007-BLG-192-L". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=MOA-2007-BLG-192-L. Retrieved 2008-06-16.
- ^ 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. Bibcode 2008ApJ...684..663B. doi:10.1086/589940. arXiv:0806.0025v1, Bibcode: 2008arXiv0806.0025B.
- ^ a b MOA-2007-BLG-192Lb: A Low-Mass Planet with a Possible Sub-Stellar-Mass Host, David P. Bennett. Accessed on line July 3, 2008.
[edit] External links
- "MOA-2007-BLG-192Lb: A Low-Mass Planet with a Possible Sub-Stellar-Mass Host". http://www.nd.edu/~bennett/moa07blg192/. Retrieved 2008-06-28.
- "Notes for star MOA-2007-BLG-192-L". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=MOA-2007-BLG-192-L. Retrieved 2008-07-02.
Coordinates: 
18h 08m 04s, −27° 09′ 00″
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