astro.wikisort.org - Star

MOA-2007-BLG-400L is a star located approximately 20000 light-years away in the constellation of Sagittarius. This star is presumed to be a red dwarf with a spectral type of M3V, based on its mass of 0.35 M_S.

MOA-2007-BLG-400L

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	18h 09m 42s
Declination	–29° 13′ 27″
Characteristics
Spectral type	M3V?
Astrometry
Distance	20000 ly (6000 pc)
Details
Mass	0.35 ± 0.15 M☉
Database references
SIMBAD	data
Extrasolar Planets Encyclopaedia	data

Planetary system

In September 2008, the discovery of an extrasolar planet was announced by the Microlensing Follow Up Network (μFUN) and the Microlensing Observations in Astrophysics (MOA) Collaboration. This planet was detected by the gravitational microlensing method based on an event recorded in September 2007.

The MOA-2007-BLG-400L system

Companion	Mass	Observed separation (AU)
b	0.9 ± 0.4 MJ	0.85 ± 0.25

See also

• List of extrasolar planets
• MOA-2007-BLG-192L

References

• Dong, Subo; et al. (2009). "Microlensing Event MOA-2007-BLG-400: Exhuming the Buried Signature of a Cool, Jovian-Mass Planet" (abstract). The Astrophysical Journal. 698 (2): 1826–1837. arXiv:0809.2997. Bibcode:2009ApJ...698.1826D. doi:10.1088/0004-637X/698/2/1826. S2CID 16658501.web preprint

External links

• MOA-2007-BLG-400 Event

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