HD 50499 is a star listed in the Henry Draper Catalogue (HD). It is classified as a G‑type main‑sequence star (spectral type G5 V) and has an apparent visual magnitude of approximately 7.4, making it invisible to the unaided eye. Astrometric measurements place the star at a distance of roughly 57 parsecs (≈186 light‑years) from the Sun.
Stellar characteristics
| Property | Value |
|---|---|
| Spectral type | G5 V |
| Apparent magnitude (V) | ~7.4 |
| Parallax (Gaia DR3) | ~17.5 mas (→ ≈ 57 pc) |
| Effective temperature | ~5,650 K |
| Mass | ~1.0 M☉ (solar masses) |
| Radius | ~1.2 R☉ (solar radii) |
| Luminosity | ~1.3 L☉ (solar luminosities) |
| Constellation | Hydra (coordinates RA 06 h 45 m, Dec −09° 01′, J2000) |
Planetary system
HD 50499 is known to host at least one confirmed exoplanet, designated HD 50499 b. The planet was detected using the radial‑velocity (Doppler) method. Observational data give the following approximate orbital parameters:
| Parameter | Value |
|---|---|
| Minimum mass (M sin i) | ~1.7 M_J (Jupiter masses) |
| Orbital period | ~2,500 days (≈ 6.8 yr) |
| Semi‑major axis | ~3.8 AU |
| Eccentricity | ~0.25 (moderately elliptical) |
No additional planets have been confirmed around HD 50499 as of the latest published surveys.
Scientific relevance
Stars such as HD 50499, being relatively Sun‑like and hosting massive, long‑period giant planets, are of interest for studies of planetary formation and dynamical evolution, especially in the context of comparing solar‑type planetary systems with the architecture of our own Solar System.
Catalog identifiers
- HD 50499 (Henry Draper Catalogue)
- HIP 32916 (Hipparcos catalogue)
- SAO 131393 (Smithsonian Astrophysical Observatory catalogue)
- Gaia DR3 6098232110673756800
References
- SIMBAD astronomical database (operated at the Centre de Données astronomiques de Strasbourg).
- NASA Exoplanet Archive, entry for HD 50499 b.
- Gaia Data Release 3 (DR3) astrometric solution.
