HD 231701 b

{{short description|Exoplanet that orbits HD 231701 in the constellation of Sagitta}}

{{Infobox planet

| name = HD 231701 b / Babylonia

| discoverer = Fischer et al.

| discovery_site = {{flagicon|USA}} California, United States

| discovered = April 10, 2007

| discovery_method = Radial velocity

| apsis = astron

| semimajor = {{val|0.567|0.053}} AU

| eccentricity = {{val|0.13|0.032}}

| period = {{val|141.63|0.067}} d

| time_periastron = {{val|2463330.6|5.3}}

| arg_peri = {{val|68|14}}

| semi-amplitude = {{val|39.2|1.2}}

| star = HD 231701

}}

HD 231701 b is an extrasolar planet approximately 356 light years away in the constellation of Sagitta. This planet orbits at 0.55 AU from the star HD 231701 with eccentricity 0.19. Based on its high mass of 1.08 M_J, the planet is probably a gas giant, meaning the planet has no solid surface and have composition similar to Solar System's outer planets.

The planet HD 231701 b is named Babylonia. The name was selected in the NameExoWorlds campaign by Iraq, during the 100th anniversary of the IAU. Babylonia was a key kingdom in ancient Mesopotamia from the 18th to 6th centuries BC.{{Cite web|url=http://www.nameexoworlds.iau.org/final-results|title=Approved names|website=NameExoworlds|language=en|access-date=2020-01-02}}{{Cite web|url=https://www.iau.org/news/pressreleases/detail/iau1912/|title=International Astronomical Union {{!}} IAU|website=www.iau.org|access-date=2020-01-02}}

References

{{Reflist|refs=

{{cite journal | title=Five Intermediate-Period Planets from the N2K Sample | last1=Fischer | first1=Debra A. | last2=Vogt | first2=Steven S. | last3=Marcy | first3=Geoffrey W. | last4=Butler | first4=R. Paul | last5=Sato | first5=Bun’ei | last6=Henry | first6=Gregory W. | last7=Robinson | first7=Sarah | last8=Laughlin | first8=Gregory | last9=Ida | first9=Shigeru | display-authors=1 | journal=The Astrophysical Journal | volume=669 | issue=2 | pages=1336–1344 | year=2007 | arxiv=0704.1191 | bibcode=2007ApJ...669.1336F | doi=10.1086/521869 | s2cid=7774321 }}

{{cite journal | title=Radial Velocities from the N2K Project: Six New Cold Gas Giant Planets Orbiting HD 55696, HD 98736, HD 148164, HD 203473, and HD 211810 | last1=Ment | first1=Kristo | last2=Fischer | first2=Debra A. | last3=Bakos | first3=Gaspar | last4=Howard | first4=Andrew W. | last5=Isaacson | first5=Howard | display-authors=1 | journal=The Astronomical Journal | volume=156 | issue=5 | at=213 | year=2018 | arxiv=1809.01228 | bibcode=2018AJ....156..213M | doi=10.3847/1538-3881/aae1f5 | s2cid=119243619 | doi-access=free }}

}}

External links

{{cite encyclopedia | url=https://exoplanet.eu/catalog/hd_231701_b--390/ | encyclopedia=Extrasolar Planets Encyclopaedia | title=HD 231701 b }}

Category:Sagitta

Category:Exoplanets discovered in 2007

Category:Giant planets

Category:Exoplanets detected by radial velocity

Category:Exoplanets with proper names