HD 185269

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**HD 185269**
Observation data Epoch J2000.0
Constellation (pronunciation)	Cygnus
Right ascension	19^h 37^m 12^s
Declination	+28º 30' 00"
Apparent magnitude (V)	+6.67
Absolute magnitude (V)	+3.31
Distance	153.3 ± 3.3 ly (47 ± 1 pc)
Spectral type	G0IV
Other designations
BD+28°3412, GC 27147, HIP 96507, SAO 87464

HD 185269 is a seventh magnitude star in the constellation Cygnus. It is easily visible to binoculars, but not the naked eye.

The star is a quarter more massive and four times more luminous than our local star. The spectrum of the star is G0IV and located 47 parsecs away.

[edit] HD 185269 b

**HD 185269 b**
Discovery
Discovered by	Moutou et al. and Johnson et al.
Discovery site	Observatoire de Haute Provence, Lick Observatory
Discovery date	August 18, 2006
Detection method	Doppler Spectroscopy
Designations
Alternative names	HIP 96507 b SAO 87464 b
Orbital characteristics
Periastron	0.054 AU
Apastron	0.100 AU
Semi-major axis	0.077 AU
Eccentricity	0.3 ± 0.04
Orbital period	6.838 ± 0.001 d
Average orbital speed	119.41 km/s
Inclination	?
Angular distance	1.638 mas
Longitude of periastron	173 ± 6.8°
Time of periastron	2,453,154.1 ± 0.18 JD
Semi-amplitude	86 ± 4.4 m/s
Physical characteristics
Mass	>0.94 M_J
Temperature	1308 K

A planet, designated as HD 185269 b is a hot Jupiter. The minimum planet mass is slightly less than Jupiter and the orbital period is about one week. Most hot Jupiters are thought to have undergone tidal circularization, making the eccentricity of HD 185269b (e=0.3) unusual. Despite having a large transit probability, none have yet been detected by various photometric monitoring campaigns.

The planet was discovered nearly simultaneously by Johnson et al. as part of a search for planets around subgiants, and by Moutou et. al. as part of a search for planets around metal-rich stars (the submission dates to the journals ApJ and Astronomy and Astrophysics were separated by only 9 days).