HD 222237

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HD 222237
Observation data
Epoch J2000      Equinox J2000
Constellation Tucana[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 7.09[3]
Characteristics
Evolutionary stage main sequence
Spectral type K3+V[4]
U−B Template:Engvar 0.824[3]
B−V Template:Engvar 1.001[3]
V−R Template:Engvar 0.585[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: 143.736 mas/yr[2]
Dec.: −736.907 mas/yr[2]
Parallax (π)87.3724±0.0187 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)6.80[3]
Details
MassScript error: No such module "val".[5] Template:Solar mass
RadiusScript error: No such module "val".[5] Template:Solar radius
Luminosity0.22[6] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[5] cgs
TemperatureScript error: No such module "val".[5] K
Metallicity [Fe/H]Script error: No such module "val".[5] dex
Rotational velocity (v sin i)2.4[6] km/s
AgeScript error: No such module "val".[6] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[7]
Database references
SIMBADdata
Exoplanet Archivedata

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HD 222237 is a K-type main-sequence star located Script error: No such module "convert". away in the constellation Tucana. With an apparent magnitude of 7.1, it is too faint to be visible to the naked eye. It is somewhat smaller, fainter, and cooler than the Sun, with about 76% of the Sun's mass, 71% of its radius, and just 22% of its luminosity, with an effective temperature of 4,750 Kelvin. It is a low metallicity star, meaning the abundance of elements heavier than helium is lower than in the Sun.[5] No infrared excess has been detected that would otherwise indicate the presence of a circumstellar disk around this star.[8]

The star hosts one known exoplanet, the super-Jupiter HD 222237 b. This planet was discovered in 2024 using radial velocity as well as astrometry from the Hipparcos and Gaia space telescopes. It has about 5 times the mass of Jupiter, and has an eccentric orbit around its star with a period of about 40 years at a distance of about 11 AU, around the distance of Saturn from the Sun.[5] Direct imaging of the planet with the James Webb Space Telescope is planned.[9]

The HD 222237 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b Script error: No such module "val". [[Jupiter mass|Template:MvarJ]] Script error: No such module "val". Script error: No such module "val". Script error: No such module "val". Script error: No such module "val".° —

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See also

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b c d e Script error: No such module "Citation/CS1".
  4. ↑ Script error: No such module "Citation/CS1".
  5. ↑ a b c d e f g h Script error: No such module "Citation/CS1".
  6. ↑ a b c Script error: No such module "Citation/CS1".
  7. ↑ Template:Cite simbad
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".

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Template:Tucana

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