HD 4313 b is an extrasolar planet orbiting the K-type star HD 4313 approximately 447 light years away in the constellation Pisces.[1] This planet was discovered using the Doppler spectroscopy (radial velocity) method.

HD 4313 b

An artist's impression of HD 4313 b orbiting its parent star.
Discovery[1]
Discovered by	Johnson et al.
Discovery site	Keck Observatory
Discovery date	2010-03-17
Detection method	Doppler spectroscopy
Orbital characteristics[2]
Semi-major axis	1.157±0.097 AU
Eccentricity	0.147±0.047
Orbital period (sidereal)	356.21±0.88 d
Time of perihelion	2454816±12 JD
Argument of perihelion	102±13 º
Semi-amplitude	40.3±1.7 m/s
Star	HD 4313
Physical characteristics
Mean radius	~1.2 RJ
Mass	≥1.927±0.090 MJ[2]
Surface gravity	69.25 m/s2
Temperature	479.9 K (206.8 °C; 404.1 °F)

Discovery

HD 4313 was discovered by a group of scientist at the Keck Observatory on March 17, 2010 using the Doppler spectroscopy method, which is detecting a planet by the star's change in wobbling.

Properties

Orbit

HD 4313 has a orbital period similar to Earth, with an orbit of approximately, 356 days.[3] Its orbit distance is similar, about 1 AU away from its host star.[3] According to the latest data, this planet has a somewhat eccentric orbit.[3]

Physical characteristics

HD 4313 has a mass only 92.7% greater than that of Jupiter, but its radius and inclination is unknown, so the true mass and radius can't be studied. A best estimate of the radius is 1.2 times that of Jupiter.[4]

See also

• HD 181342 b
• HD 206610 b
• HD 180902 b
• HD 136418 b
• HD 212771 b

References

External links

• "HD 4313 b". The Extrasolar Planets Encyclopaedia.

На других языках

[ru] HD 4313 b