OGLE-2005-BLG-169L

OGLE-2005-BLG-169L

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	18^h 06^m 05.32^s[1]
Declination	–30° 43′ 57.5″[1]
Apparent magnitude (V)	+20.4[1]
Characteristics
Spectral type	M?
Astrometry
Distance	8,800 ly (2,700 pc)
Details
Mass	0.49 M☉
Other designations
EWS 2005-BUL-169, EWS 2005-BLG-169[1]
Database references
SIMBAD	data

OGLE-2005-BLG-169L is a dim and distant magnitude 20 galactic bulge star located about 2,700 parsecs away in the constellation Sagittarius. If it is a main sequence star, then it is most likely a red dwarf with about half of the mass of the Sun. Other possibilities are a white dwarf star, or (less likely) a neutron star or black hole.[1]

Planetary system

In 2006, an Uranus-mass extrasolar planet was detected by gravitational microlensing around this star.[2]

The OGLE-2005-BLG-169L planetary system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.041 MJ	2.7	~3300	—	—	—

See also

• List of extrasolar planets
• OGLE-2005-BLG-390L
• Optical Gravitational Lensing Experiment or OGLE

References

1. "SIMBAD query result: NAME OGLE 2005-BLG-169 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-30.
2. Gould, A.; et al. (2006). "Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common". The Astrophysical Journal Letters. 644 (1): L37 – L40. arXiv:astro-ph/0603276. Bibcode:2006ApJ...644L..37G. doi:10.1086/505421. S2CID 14270439.

External links

• "OGLE-05-169L". Exoplanets. Archived from the original on 2010-03-18. Retrieved 2009-04-30.