HD 16417 b (also called λ2 Fornacis b) is an extrasolar planet located approximately 83 light years away in the constellation of Fornax, orbiting the 6th magnitude G-type main sequence star HD 16417. This planet has a minimum mass only 7% that of Jupiter, making it a Neptune-mass planet. In addition to this, it orbits relatively close to the host star and suffers high temperature. It is the third planet discovered in the Fornax constellation on February 23, 2009. This planet was discovered by a method called the radial velocity method.[1]

HD 16417 b
HD 16417 b's orbit compared to Mercury's
orbit (0.38AU) in the Solar System.
Discovery
Discovered byO’Toole et al.
Discovery siteAnglo-Australian Observatory
Discovery dateFebruary 23, 2009
radial velocity
Orbital characteristics
Apastron0.17 AU (25,000,000 km)
Periastron0.11 AU (16,000,000 km)
0.14 ± 0.01 AU (20,900,000 ± 1,500,000 km)
Eccentricity0.20 ± 0.09
17.24 ± 0.01 d
0.04720 ± 0.00003 y
2450099.74 ± 3.3
77 ± 26
StarHD 16417

References

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  1. ^ O’Toole, Simon; et al. (2009). "A Neptune-mass Planet Orbiting the Nearby G Dwarf HD16417". The Astrophysical Journal. 697 (2): 1263–1268. arXiv:0902.4024. Bibcode:2009ApJ...697.1263O. doi:10.1088/0004-637X/697/2/1263.