HD 178233

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Template:Short description

HD 178233
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.53[2]
Characteristics
Spectral type F0III[3] or A7V[4]
U−B Template:Engvar +0.04
B−V Template:Engvar Script error: No such module "val".[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[5] km/s
Proper motion (μ) RA: 75.662[1] mas/yr
Dec.: 85.291[1] mas/yr
Parallax (π)24.3974±0.0867 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)2.52[2]
Details
Mass1.54[6] Template:Solar mass
RadiusScript error: No such module "val".[1] Template:Solar radius
LuminosityScript error: No such module "val".[1] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[6] cgs
TemperatureScript error: No such module "val".[1] K
Metallicity [Fe/H]0.04[7] dex
Age498[6] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[8]
Database references
SIMBADdata

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HD 178233 is a single[9] star in the northern constellation of Lyra. It is bright enough to be dimly visible to the naked eye with an apparent visual magnitude of 5.53,[2] making it a sixth magnitude star. The distance to HD 178233 is 134 light years based on parallax measurements, but it is drifting closer to the Sun with a radial velocity of approximately −24 km/s.[5]

The stellar classification of this star was determined to be F0III by A. Cowley and associates (1969),[3] matching an evolved F-type giant star. In contrast, D. R. Palmer and associates (1968) listed it as an A-type main-sequence star with a class of A7V.[4] It is about a half billion years old and is spinning rapidly with a projected rotational velocity of 165.0 km/s, which is giving the star an equatorial bulge that is ~24% wider than the polar radius.[10] The star has 1.5[6] times the mass and 1.8[1] times the mean radius of the Sun. It is radiating over eight times the luminosity of the Sun from its photosphere at an effective temperature of 7,220 K.[1]

References

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  1. ↑ a b c d e f g h i j Template:Cite Gaia DR2
  2. ↑ a b c d Script error: No such module "Citation/CS1".
  3. ↑ a b Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ a b c d Script error: No such module "Citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ Template:Cite simbad
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".

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Template:Stars of Lyra

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