HD 1461 b

HD 1461 b is an extrasolar planet, orbiting the 6th magnitude G-type star HD 1461, 76.5 light years away in the constellation Cetus. This planet has a minimum mass 6.4 times that of Earth and orbits at a distance of 0.0634 AU with an eccentricity of less than 0.131. It is currently unknown whether the planet is a gas giant like Uranus or Neptune, or has terrestrial composition like CoRoT-7b. This planet was announced on 13 December 2009 after it was discovered using radial velocity measurements taken at the Keck and Anglo-Australian Observatories.^[2][3]

HD 1461 b

Discovery
Discovered by	Vogt et al.
Discovery site	Keck Observatory Anglo-Australian Observatory
Discovery date	2009-12-14
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.0634±0.0022 AU
Eccentricity	<0.131[1]
Orbital period (sidereal)	5.77152±0.00045[1] d
Semi-amplitude	2.28±0.15[1]
Star	HD 1461

References

1. Díaz, R. F.; et al. (2016). "The HARPS search for southern extra-solar planets. XXXVIII. Bayesian re-analysis of three systems. New super-Earths, unconfirmed signals, and magnetic cycles". Astronomy and Astrophysics. 585. A134. arXiv:1510.06446. Bibcode:2016A&A...585A.134D. doi:10.1051/0004-6361/201526729. S2CID 118531921.
2. Rivera, Eugenio J.; et al. (2010). "A Super-Earth Orbiting the Nearby Sun-like Star HD 1461". The Astrophysical Journal. 708 (2): 1492–1499. arXiv:0912.2566. Bibcode:2010ApJ...708.1492R. doi:10.1088/0004-637X/708/2/1492. S2CID 12840404.
3. Tim Stephens (2009-12-13). "New planet discoveries suggest low-mass planets are common around nearby stars". UCSC News. UC Santa Cruz. Retrieved 2018-10-06.