WASP-8

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Template:Short description

WASP-8
Observation data
Epoch J2000      Equinox J2000
Constellation Sculptor[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 9.87[3]
Characteristics
WASP-8A
Evolutionary stage main-sequence
Spectral type G8V[4]
WASP-8B
Spectral type M[5]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: 109.752 mas/yr[2]
Dec.: 7.615 mas/yr[2]
Parallax (π)11.1052±0.0175 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Position (relative to WASP-8A)[5]
ComponentWASP-8B
Epoch of observation2016
Angular distanceScript error: No such module "val".″
Position angleScript error: No such module "val".°
Projected separation408 AU
Details[6]
WASP-8A
MassScript error: No such module "val". Template:Solar mass
RadiusScript error: No such module "val". Template:Solar radius
Luminosity0.79 Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val". cgs
TemperatureScript error: No such module "val". K
Metallicity [Fe/H]Script error: No such module "val". dex
Rotational velocity (v sin i)Script error: No such module "val".[7] km/s
AgeScript error: No such module "val". Gyr
WASP-8B
MassScript error: No such module "val". Template:Solar mass
TemperatureScript error: No such module "val". K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[3]
Database references
SIMBADA
B
Exoplanet Archivedata

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WASP-8 is a binary star system Script error: No such module "convert". away. The star system is much younger than the Sun at 300 million to 1.2 billion years age, and is heavily enriched in heavy elements, having nearly twice the concentration of iron compared to the Sun.[6]

The primary, WASP-8A, is a magnitude 9.9 main-sequence yellow dwarf star. It is reported to be a G-type star with a temperature of 5600 K and has a mass 1.093±0.024, a radius 0.976±0.020 and a luminosity of 0.79 times that of the Sun. There is a companion star WASP-8B located 4.5 arcseconds away with the same proper motion, indicating a stellar binary system.[8] The binarity was confirmed in 2020.[5] The axis orientation of the primary star is uncertain, but it is close to pointing one of the poles to the Earth.[7]

Planetary system

The primary star is orbited by two known exoplanets, designated WASP-8b and WASP-8c. WASP-8b was discovered in 2010 by the astronomical transit method and was catalogued as part of the SuperWASP mission.[8] WASP-8c was discovered in late 2013 with the radial velocity method.[9]

Template:OrbitboxPlanet begin Template:OrbitboxPlanet Template:OrbitboxPlanet

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See also

References

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

Template:Sky

Template:Stars of Sculptor

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