HD 49674
File:HIP 32916.jpg HD 49674 (center) in optical light | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 8.10[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G3V[3] |
| B−V Template:Engvar | Script error: No such module "val".[1] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: 34.682 mas/yr[2] Dec.: −122.686 mas/yr[2] |
| Parallax (π) | 23.3216±0.0218 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 4.88[1] |
| Details | |
| Mass | Script error: No such module "val".[4] Template:Solar mass |
| Radius | Script error: No such module "val".[4] Template:Solar radius |
| Luminosity | Script error: No such module "val".[4] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[4] cgs |
| Temperature | Script error: No such module "val".[4] K |
| Metallicity [Fe/H] | Script error: No such module "val".[3] dex |
| Rotational velocity (v sin i) | 4.7[5] km/s |
| Age | Script error: No such module "val".[4] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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HD 49674 is a solar-type star with an exoplanetary companion[7] in the northern constellation of Auriga. It has an apparent visual magnitude of 8.10[1] and thus is an eighth-magnitude star that is too faint to be readily visible to the naked eye. The system is located at a distance of 140 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s.[2]
HD 49674, and its planetary system, was chosen as part of the 2019 NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to be named. HD 49674 was assigned to Belgium. The winning proposal named the star Nervia and the planet Eburonia, both after prominent Belgic tribes, the Nervii and Eburones, respectively.[8]
This is an ordinary G-type main-sequence star with a stellar classification of G3V,[3] which indicates it is generating energy through hydrogen fusion at its core. Spinning with a projected rotational velocity of 4.7 km/s,[5] it is younger than the Sun, roughly two billion years of age, and is a metal-rich star.[7] HD 49674 has a similar mass and radius as the Sun. It is radiating 96% of the Sun's luminosity from its photosphere at an effective temperature of Script error: No such module "val"..[4]
Planetary system
At the time of discovery of the planet HD 49674 b in 2002, it was the least massive exoplanet known, very close to the boundary between sub-Jupiter mass and Neptune mass at 0.1 MJ. This planet orbits very close to the star, with a semimajor axis of Template:Cvt.[9]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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- ↑ a b c d e Template:Cite XHIP
- ↑ a b c d e f g Template:Cite Gaia DR3
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- ↑ Template:Cite simbad
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- ↑ Script error: No such module "Citation/CS1".
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External links
- Script error: No such module "citation/CS1".
- HIP 32916 Catalog
- Image HD 49674