HD 16175

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HD 16175
Observation data
Epoch J2000.0
Constellation
(pronunciation)		 Perseus
Right ascension 02h 37m 01.91s
Declination +42° 03′ 45.47″
Apparent magnitude (V) +7.28
Absolute magnitude (V) +3.40
Distance 195 ly
(59.8 pc)
Spectral type G0
Other designations

HD 16175 is a yellow G-type star with temperature about 6000 K located in the Perseus constellation and the distance is 60 parsecs away from Earth. It is the 7th magnitude star, meaning it can only be visible through binoculars or better equipment. The absolute magnitude is 3.40, showing that it is 3.73 times more luminous than our local star at visible wavelength.

Contents

[edit] HD 16175 b

HD 16175 b
Extrasolar planet List of extrasolar planets
Orbital elements
Semimajor axis (a) 2.07 AU
Eccentricity (e) 0.48±0.1
Orbital period (P) 856±80 d
Angular distance (θ) 34.615 mas
Longitude of
periastron		 (ω) 223.2±8°
Time of periastron (T0) 2452950±100 JD
Semi-amplitude (K) 54.1 m/s
Physical characteristics
Mass (m) >4.5 MJ
Discovery information
Discovery date Sept 20, 2007
published Oct 22, 2007
Discoverer(s) Johnson et al.
Detection method radial velocity
Discovery status Published

HD 16175 b is an extrasolar planet that masses 4.5 times that of Jupiter. However, the mass is only minimum since inclination of the orbital plane is not known. This planet orbits at about 310 gigameters, taking 2.34 years to revolve around the star. The orbit of the planet is eccentric at 48%. At periastron, the distance is close as 161 Gm; and at apastron, the distance is far as 459 Gm from the parent yellow star.

As it is typical for most exoplanets found so far, it used the technique called radial velocity or “wobbling effect”. It was discovered in September 2007 and published in October by Johnson et al. and other team members.

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