HD 4313 b

{{Short description|Extrasolar planet in the constellation Pisces}}

{{Infobox planet

| name = HD 4313 b

| image = File:HD 4313 b.png

| image_size =

| image_alt =

| caption = An artist's impression of HD 4313 b orbiting its parent star.

| discovery_ref =

| discoverer = Johnson et al.

| discovery_site = Keck Observatory

| discovered = 2010-03-17

| discovery_method = Doppler spectroscopy

| orbit_ref =

| semimajor = {{val|1.157|0.097|ul=AU}}

| eccentricity = {{val|0.147|0.047}}

| period = {{val|356.21|0.88|u=days}}

| time_periastron = {{val|2454816|12|ul=JD}}

| arg_peri = {{val|102|13|u=º}}

| semi-amplitude = {{val|40.3|1.7|ul=m/s}}

| star = HD 4313

| mass = {{val|1.927|0.090|p=≥|ul=Jupiter mass}}

| mean_radius = ~{{val|1.2|ul=Jupiter radius}}

| single_temperature = {{convert|479.9|K|C F}}

| surface_grav = {{val|69.25|ul=m/s2}}

}}

HD 4313 b is an extrasolar planet orbiting the K-type star HD 4313 approximately 447 light years away in the constellation Pisces. 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.{{Cite web|title=Exoplanet Archive|url=https://exoplanetarchive.ipac.caltech.edu/overview/HD%204313#star_HD-4313_collapsible|access-date=2020-12-11|website=exoplanetarchive.ipac.caltech.edu}} Its orbit distance is similar, about 1 AU away from its host star. According to the latest data, this planet has a somewhat eccentric orbit.

= 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.{{Cite web|title=Exoplanet-catalog|url=https://exoplanets.nasa.gov/exoplanet-catalog/6787/hd-4313-b/|access-date=2020-12-11|website=Exoplanet Exploration: Planets Beyond our Solar System}}

References

{{reflist|refs=

{{cite journal | title=Retired a Stars and Their Companions. IV. Seven Jovian Exoplanets from Keck Observatory | last1=Johnson | first1=John Asher | last2=Howard | first2=Andrew W. | last3=Bowler | first3=Brendan P. | last4=Henry | first4=Gregory W. | last5=Marcy | first5=Geoffrey W. | last6=Wright | first6=Jason T. | last7=Fischer | first7=Debra A. | last8=Isaacson | first8=Howard | display-authors=1 | journal=Publications of the Astronomical Society of the Pacific | volume=122 | issue=892 | pages=701–711 | year=2010 | arxiv=1003.3445 | bibcode=2010PASP..122..701J | doi=10.1086/653809 | s2cid=188131 }}

{{cite journal | title=Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts | last1=Luhn | first1=Jacob K. | last2=Bastien | first2=Fabienne A. | last3=Wright | first3=Jason T. | last4=Johnson | first4=John A. | last5=Howard | first5=Andrew W. | last6=Isaacson | first6=Howard | display-authors=1 | journal=The Astronomical Journal | volume=157 | issue=4 | at=149 | year=2019 | arxiv=1811.03043 | bibcode=2019AJ....157..149L | doi=10.3847/1538-3881/aaf5d0 | s2cid=102486961 | doi-access=free }}

}}

External links

{{cite encyclopedia | url=https://exoplanet.eu/catalog/hd_4313_b--653/ | encyclopedia=Extrasolar Planets Encyclopaedia | title=HD 4313 b | date=1995 }}

Category:Exoplanets discovered in 2010

Category:Exoplanets detected by radial velocity

Category:Pisces (constellation)

Category:Giant planets