HD 16417 b

HD 16417 b
Exoplanet List of exoplanets

HD 16417 b's orbit compared to Mercury's
orbit (0.38AU) in our Solar System.
Parent star
Star HD 16417
Constellation Fornax
Right ascension (α) 02h 36m 58.61s[1]
Declination (δ) –34° 34 40.7[1]
Apparent magnitude (mV) 5.78
Distance84.1 ± 0.9[1] ly
(25.8 ± 0.3[1] pc)
Spectral type G1V
Orbital elements
Semi-major axis(a) 0.14 ± 0.01 AU
Periastron (q) 0.11 AU
Apastron (Q) 0.17 AU
Eccentricity (e) 0.20 ± 0.09
Orbital period(P) 17.24 ± 0.01 d
(0.04720 ± 0.00003 y)
Argument of
periastron
(ω) 77 ± 26°
Time of periastron (T0) 2450099.74 ± 3.3 JD
Physical characteristics
Minimum mass(m sin i)0.069 ± 0.007 MJ
(21.93 ± 2.22 M)
Discovery information
Discovery date February 23, 2009
Discoverer(s) O’Toole et al.
Discovery method radial velocity
Discovery site Anglo-Australian Observatory
Discovery status Published[2]
Other designations
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

HD 16417 b (also called λ2 Fornacis b) is an extrasolar planet located approximately 84 light years away in the constellation of Fornax, orbiting the 6th magnitude G-type main sequence star HD 16417. This planet has minimum mass only 7% that of Jupiter, making this 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 Fornax constellation on February 23, 2009. This planet was discovered by a method called the radial velocity method.

References

Coordinates: 02h 36m 58.6079s, −34° 34′ 40.717″


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