HD 11506
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 7.51[2] |
| Characteristics | |
| Spectral type | G0V[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". mas/yr[1] Dec.: Script error: No such module "val". mas/yr[1] |
| Parallax (π) | 19.5342±0.0221 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 3.94[2] |
| Details[4] | |
| Mass | Script error: No such module "val".[5] Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". 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".[5] dex |
| Rotation | ~15 days[5] |
| Rotational velocity (v sin i) | Script error: No such module "val".[5] km/s |
| Age | Script error: No such module "val". Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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HD 11506 is a star in the equatorial constellation of Cetus. It has a yellow hue and can be viewed with a small telescope but is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.51.[2] The distance to this object is 167 light-years based on parallax, but it is drifting closer to the Sun with a radial velocity of −7.5 km/s.[1] It has an absolute magnitude of 3.94.[2]
This object is an ordinary G-type main-sequence star with a stellar classification of G0V,[3] which indicates it is generating energy via hydrogen fusion at its core. It is around 1.6[4] billion years old and is spinning with a projected rotational velocity of 5 km/s.[7] The star has 112% of the mass of the Sun and 106% of the Sun's radius. The spectrum shows a higher than solar abundance of elements other than hydrogen and helium – what astronomers term the metallicity.[8] The star is radiating 117% of the Sun's luminosity from its photosphere at an effective temperature of 5,833 K.[4]
Planetary system
The superjovian planet HD 11506 b was discovered orbiting the star by the N2K Consortium in 2007 using the Doppler spectroscopy method.[3] In 2009, a second planet discovery was claimed based on Bayesian analysis of the original data.[9] However, in 2015 additional radial velocity measurements showed that the planetary parameters were significantly different than those determined by Bayesian analysis. An additional linear trend in the radial velocities indicated a stellar or planetary companion on a long term orbit.[8]
In 2022, the presence of a third planet was confirmed, and the mass and inclination of both planet b and the new planet d were measured via astrometry.[10] A 2024 study also confirmed HD 11506 d, but found a significantly wider orbit and greater mass than previously estimated. This object orbits with a 73-year period, and at about 13 times the mass of Jupiter, it is at the borderline of being a brown dwarf.[5]
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References
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- ↑ a b c d e f Template:Cite Gaia DR3
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- ↑ Template:Cite simbad
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