HD 4313 b

HD 4313 b
	An artist's impression of HD 4313 b orbiting its parent star.
Discovery
Discovered by	Johnson et al.
Discovery site	Keck Observatory
Discovery date	2010-03-17
Detection method	Doppler spectroscopy
Orbital characteristics
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
Surface gravity	69.25 m/s2
Temperature	479.9 K (206.8 °C; 404.1 °F)

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.

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 an 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]

References

^ ^a ^b Johnson, John Asher; et al. (2010). "Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809. S2CID 188131.
^ ^a ^b Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.
^ ^a ^b ^c "Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2020-12-11.
^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-12-11.

External links

"HD 4313 b". Extrasolar Planets Encyclopaedia. 1995.

[Johnson2010-1] Johnson, John Asher; et al. (2010). "Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory". Publications of the Astronomical Society of the Pacific. 122 (892): 701–711. arXiv:1003.3445. Bibcode:2010PASP..122..701J. doi:10.1086/653809. S2CID 188131.

[Luhn2019-2] Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.

[:0-3] "Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2020-12-11.

[4] "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-12-11.

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