HD 171028
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| 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 | |
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
| 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.
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