HD 121504
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | 7.54[1] |
| Characteristics | |
| Spectral type | G2V[3] |
| B−V Template:Engvar | 0.593±0.002[4][1] |
| Astrometry | |
| Radial velocity (Rv) | 19.603±0.0004[5] km/s |
| Proper motion (μ) | RA: −249.354 mas/yr[2] Dec.: −84.570 mas/yr[2] |
| Parallax (π) | 24.0593±0.0269 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 4.27[1] |
| Details | |
| Mass | 1.16±0.02[6] Template:Solar mass |
| Radius | 1.15±0.03[6] Template:Solar radius |
| Luminosity | 1.62±0.04[6] Template:Solar luminosity |
| Surface gravity (log g) | 4.38±0.03[6] cgs |
| Temperature | 6,089±47[6] K |
| Metallicity [Fe/H] | 0.16[4] dex |
| Rotation | 8.6 days[4] |
| Rotational velocity (v sin i) | 2.6[4] km/s |
| Age | 1.9±1.0[6] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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HD 121504 is a star with an orbiting exoplanet in the southern constellation of Centaurus. It is located at a distance of 136 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 19.6 km/s.[5] With an apparent visual magnitude of 7.54,[1] this star is too faint to be visible to the naked eye. It shows a high proper motion, traversing the celestial sphere at an angular rate of Script error: No such module "val"..[8]
The spectrum of this star presents as an ordinary G-type main-sequence star, a yellow dwarf similar in appearance to the Sun, having a stellar classification of G2V.[3] It is roughly two billion years old and is spinning with a rotation period of 8.6 days. The star has 16% more mass than the Sun and a 15% greater radius.[6] The metallicity (the abundance of elements more massive than helium) is higher than solar.[4] The star is radiating 162% of the luminosity of the Sun from its photosphere at an effective temperature of 6,089 K.[6]
A nearby visual companion, designated as SAO 241323 has been proposed as a component of the system. However, the pair form an optical binary with an angular separation of Script error: No such module "val".,[4] and in reality this is a white giant star located thousands of light years away.Script error: No such module "Unsubst".
Exoplanet
In 2000 the Geneva Extrasolar Planet Search Team announced the discovery of an extrasolar planet orbiting the star.[9]
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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