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.[2]

HD 231701 b

Discovery
Discovered by	Fischer et al.
Discovery site	California, United States
Discovery date	April 10, 2007
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.567±0.053 AU
Eccentricity	0.13±0.032[1]
Orbital period (sidereal)	141.63±0.067[1] d
Time of periastron	2463330.6±5.3[1]
Argument of periastron	68±14[1]
Semi-amplitude	39.2±1.2[1]
Star	HD 231701

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.[3][4]

References

External links

• "HD 231701 b". The Extrasolar Planets Encyclopaedia.

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[es] HD 231701 b