HD 171028

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HD 171028
Observation data
Epoch J2000.0
Constellation
(pronunciation)
Ophiuchus
Right ascension 18h 32m 15.5s
Declination +06º 56' 44.7"
Apparent magnitude (V) +8.31
Distance 293.5±25.4 ly
(90±7.8 pc)
Spectral type G0
Other designations
BD+06º3833, SAO 123612, HD 171028

HD 171028 is a yellow star in the constellation Ophiuchus. The apparent magnitude is +8.31, which it can be visible in good binoculars. Unlike most planet-harboring stars, it does not have Hipparcos number, though the distance was estimated at 90±7.8 parsecs.

[edit] HD 171028 b

HD 171028 b
Extrasolar planet List of extrasolar planets
Orbital elements
Semimajor axis (a) 1.29 AU
Eccentricity (e) 0.61
Orbital period (P) 538±2 d
Angular distance (θ) 14.333 mas
Longitude of
periastron
(ω) 305±1°
Time of periastron (T0) 2453648.92±1.89 JD
Semi-amplitude (K) ? m/s
Physical characteristics
Mass (m) >1.83 MJ
Discovery information
Discovery date 2007
Discoverer(s) Santos et al.
Detection method Doppler spectroscopy
Discovery status Confirmed

HD 171028 b is a 1.83 MJ exoplanet orbiting very eccentrically around HD 171028. The period is 1.473 years and semi-major axis of 1.29 AU. The Geneva Extrasolar Planet Search team announced the discovery of planet on July 13, 2007.

[edit] External links