HD 88133

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Template:Short description

HD 88133
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 8.01[2]
Characteristics
Spectral type G8V[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: −11.135 mas/yr[1]
Dec.: −264.912 mas/yr[1]
Parallax (π)13.5882±0.0249 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)3.50[5]
Details
MassScript error: No such module "val".[6] Template:Solar mass
RadiusScript error: No such module "val".[6] Template:Solar radius
LuminosityScript error: No such module "val".[4] Template:Solar luminosity
Surface gravity (log g)3.82[5] cgs
TemperatureScript error: No such module "val".[4] K
Metallicity [Fe/H]0.26[5] dex
Rotational velocity (v sin i)4.9[5] km/s
Age5.08[5] Gyr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[7]
Database references
SIMBADdata

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HD 88133 is a yellow star with an orbiting exoplanet in the equatorial constellation of Leo. It has an apparent visual magnitude of 8.01,[2] which is too faint to be visible to the naked eye. With a small telescope it should be easily visible. The distance to this system, as measured through parallax, is 240 light years, but it is slowly drifting closer with a radial velocity of −3.6 km/s.[4]

This is classified as an ordinary G-type main-sequence star with a stellar classification of G8V.[3] However, D. A. Fischer and associates in 2005 listed a class of G5 IV, suggesting it is instead a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core.[8] It is about 5 billion years old and is spinning with a projected rotational velocity of 4.9 km/s.[5] The star has 23% more mass than the Sun and has double the Sun's girth.[6] It is radiating over three times the luminosity of the Sun from its photosphere at an effective temperature of 5,414 K.[4]

Planetary system

In 2004 a close orbiting exoplanet was found using Doppler spectroscopy.[8] In 2016 the direct detection of the planetary thermal emission spectrum was claimed,[9] but the detection was brought into questioned in 2021.[10]

Template:OrbitboxPlanet begin Template:OrbitboxPlanet

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See also

References

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  1. ↑ a b c d Template:Cite Gaia DR3
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  4. ↑ a b c d e Template:Cite Gaia DR2
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  6. ↑ a b c Script error: No such module "Citation/CS1".
  7. ↑ Template:Cite simbad
  8. ↑ a b Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
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Template:Sky Template:Stars of Leo

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