HD 156668 b is an extrasolar planet orbiting the star HD 156668 78.5 light-years away in the constellation Hercules. It has a minimum mass of 3.1 Earth masses. At the time of discovery it was the second least massive planet discovered by the radial velocity method after Gliese 581 e, subject to the mass/inclination degeneracy that affects radial velocity measurements.[3] In addition to this, it has the lowest semi-amplitude, or the speed of the stellar wobble caused by planet's gravity tugging on the star determined by radial velocity, at 2.2 m/s.[3] This planet was discovered on January 6, 2010; it is the 8th planet discovered in 2010 after the first five planets detected by Kepler on January 4 and two planets around HD 9446 on January 5.
^ abcAndrew W. Howard; John Asher Johnson; Geoffrey W. Marcy; Debra A. Fischer; Jason T. Wright; Gregory W. Henry; Howard Isaacson; Jeff A. Valenti; Jay Anderson; Nikolai E. Piskunov (2010). "The NASA-UC Eta-Earth Program: II. A Planet Orbiting HD 156668 with a Minimum Mass of Four Earth Masses". The Astrophysical Journal. 726 (2): 73. arXiv:1003.3444v1. Bibcode:2011ApJ...726...73H. doi:10.1088/0004-637X/726/2/73. S2CID 15559379.
^ abDawson, Rebekah I.; Fabrycky, Daniel C. (2010). "Radial velocity planets de-aliased. A new, short period for Super-Earth 55 Cnc e". The Astrophysical Journal. 722 (1): 937–953. arXiv:1005.4050. Bibcode:2010ApJ...722..937D. doi:10.1088/0004-637X/722/1/937. S2CID 118592734.
^ ab. W.M. Keck Observatory. 2010-01-07. Archived from the original on 2016-03-10. Retrieved 2010-01-07.
This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it.
156668, extrasolar, planet, orbiting, star, 156668, light, years, away, constellation, hercules, minimum, mass, earth, masses, time, discovery, second, least, massive, planet, discovered, radial, velocity, method, after, gliese, subject, mass, inclination, deg. HD 156668 b is an extrasolar planet orbiting the star HD 156668 78 5 light years away in the constellation Hercules It has a minimum mass of 3 1 Earth masses At the time of discovery it was the second least massive planet discovered by the radial velocity method after Gliese 581 e subject to the mass inclination degeneracy that affects radial velocity measurements 3 In addition to this it has the lowest semi amplitude or the speed of the stellar wobble caused by planet s gravity tugging on the star determined by radial velocity at 2 2 m s 3 This planet was discovered on January 6 2010 it is the 8th planet discovered in 2010 after the first five planets detected by Kepler on January 4 and two planets around HD 9446 on January 5 HD 156668 bDiscoveryDiscovered byHoward et al Discovery siteKeck ObservatoryDiscovery date2010 01 06Detection methodDoppler SpectroscopyOrbital characteristicsSemi major axis0 04998 0 00083 AU 7 477 000 124 000 km 1 Eccentricity0 000 2 Orbital period sidereal 4 6455 0 0011 1 dArgument of periastron0 2 Semi amplitude1 89 0 26 1 StarHD 156668References edit a b c Andrew W Howard John Asher Johnson Geoffrey W Marcy Debra A Fischer Jason T Wright Gregory W Henry Howard Isaacson Jeff A Valenti Jay Anderson Nikolai E Piskunov 2010 The NASA UC Eta Earth Program II A Planet Orbiting HD 156668 with a Minimum Mass of Four Earth Masses The Astrophysical Journal 726 2 73 arXiv 1003 3444v1 Bibcode 2011ApJ 726 73H doi 10 1088 0004 637X 726 2 73 S2CID 15559379 a b Dawson Rebekah I Fabrycky Daniel C 2010 Radial velocity planets de aliased A new short period for Super Earth 55 Cnc e The Astrophysical Journal 722 1 937 953 arXiv 1005 4050 Bibcode 2010ApJ 722 937D doi 10 1088 0004 637X 722 1 937 S2CID 118592734 a b Second Smallest Exoplanet Found To Date At Keck W M Keck Observatory 2010 01 07 Archived from the original on 2016 03 10 Retrieved 2010 01 07 nbsp This extrasolar planet related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title HD 156668 b amp oldid 1141080301, wikipedia, wiki, book, books, library,
