HD 117207
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 7.240[2] |
| Characteristics | |
| Spectral type | G7IV-V[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[4] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 30.9440±0.0256 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 4.67[4] |
| Details[2] | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val".[5] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Age | Script error: No such module "val".[2] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
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HD 117207 is a star in the southern constellation Centaurus. With an apparent visual magnitude of 7.24,[2] it is too dim to be visible to the naked eye but can be seen with a small telescope. Based upon parallax measurements, it is located at a distance of Script error: No such module "convert". from the Sun. The star is drifting closer with a radial velocity of −17.4 km/s.[4] It has an absolute magnitude of 4.67.[4]
This object has a stellar classification of G7IV-V,[3] showing blended spectral traits of a G-type main-sequence star and an older, evolving subgiant star. It is around four[2] billion years old with 5%[7] greater mass than the Sun and a 7% larger radius.[5] The star is radiating 1.16 times the luminosity of the Sun from its photosphere at an effective temperature of 5,644 K.[5]
In 2005, a planet was found orbiting the star using the radial velocity method, and was designated HD 117207 b.[8][9] The orbital elements of this planet were refined in 2018, showing an orbital period of Script error: No such module "convert"., a semimajor axis of Script error: No such module "val"., and an eccentricity of 0.16. The minimum mass of this object is nearly double that of Jupiter. If an inner planet is orbiting the star, it must have an orbital period no greater than Script error: No such module "convert". to satisfy Hill's criteria for dynamic stability.[2] In 2023, the inclination and true mass of HD 117207 b were determined via astrometry.[10]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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- ↑ a b c d Template:Cite Gaia DR3
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- ↑ a b Script error: No such module "Citation/CS1".
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- ↑ a b c Template:Cite Gaia DR2
- ↑ Template:Cite simbad
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