HD 122430
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hydra |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.47[2] |
| Characteristics | |
| Spectral type | K2–3III[3] |
| B−V Template:Engvar | Script error: No such module "val".[2] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[1] km/s |
| Proper motion (μ) | RA: Script error: No such module "val".[1] mas/yr Dec.: Script error: No such module "val".[1] mas/yr |
| Parallax (π) | 7.3651±0.1407 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −0.17[2] |
| Details[4] | |
| 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".[1] 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 |
| Rotational velocity (v sin i) | Script error: No such module "val". km/s |
| Age | Script error: No such module "val". Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[5] | |
| Database references | |
| SIMBAD | data |
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HD 122430 is single star[6] in the equatorial constellation of Hydra. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 5.47.[2] The star is located at a distance of 105.6 light years from the Sun based on parallax.
This is an aging giant star with a stellar classification of K2–3III.[3] It has completely run out of the hydrogen fuel that keeps it stable, although it is only two billion years old,[4] younger than the Sun's 4.6 billion years. HD 122430 has a mass of 1.6 times and radius of 22.9 times that of the Sun.[4] Despite its younger age, it has slightly lower metallicity, approximately 90%. It is radiating 190[1] times the luminosity of the Sun from its photosphere at an effective temperature of 4300 K.[4]
A candidate exoplanet was reported orbiting the star via the radial velocity method at a conference in 2003, and designated HD 122430 b. It has an orbital period of Script error: No such module "convert". and an eccentricity of 0.68.[7] However, a follow-up study by Soto et al. (2015) failed to detect a signal, so it remains unconfirmed.[8]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet hypothetical
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See also
References
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- ↑ a b c d e f g h Template:Cite Gaia DR2
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- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
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