HD 171028
Coordinates: 
18h 32m 15.4929s, +06° 56′ 44.714″
18h 32m 15.4929s, +06° 56′ 44.714″| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 18h 32m 15.4933s[1] |
| Declination | 06° 56′ 44.6858″[1] |
| Apparent magnitude (V) | 8.301[2] |
| Characteristics | |
| Spectral type | G0[3] |
| B−V color index | 0.61[3] |
| Details | |
Gyr | |
| Database references | |
| SIMBAD | data |
HD 171028 is a
light years from the Sun based on parallax, and is drifting further away with a radial velocity of +13.5 km/s.[1]
This is a yellow-hued
projected rotational velocity of 2.3 km/s.[3] It has the same mass as the Sun, but the radius is 2.4 times larger. The star is radiating 5.4[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5,671 K.[2]
In the summer of 2007, a Jovian planetary companion was discovered by the
radial velocity method.[3] This object is orbiting at a distance of 1.32 AU from the host star with a period of 1.5 years and an eccentricity (ovalness) of 0.59. Since the inclination of the orbit is unknown, only a minimum mass can be determined. This planet has at least double the mass of Jupiter.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥1.98 MJ | 1.32 | 550±3 | 0.59±0.01 | — | — |
See also
- List of extrasolar planets
References
- ^ .
- ^ S2CID 118785170. A99.
- ^ S2CID 73681862.
- S2CID 209405391. A136.
- ^ "HD 171028". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-10-06.
- S2CID 16390388.
- ^ S2CID 119106340
