Xi Cassiopeiae

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Template:Short description

Xi Cassiopeiae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cassiopeia
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.81[2]
Characteristics
Spectral type B2.5 V[3]
U−B Template:Engvar −0.60[2]
B−V Template:Engvar −0.11[2]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[4] km/s
Proper motion (μ) RA: Script error: No such module "val".[1] mas/yr
Dec.: Script error: No such module "val".[1] mas/yr
Parallax (π)2.28±0.51 mas[1]
Distanceapprox. Template:Rnd ly
(approx. Template:Rnd pc)
Absolute magnitude (MV)−0.42[5]
Orbit[6]
Period (P)940.2 d
Eccentricity (e)0.4
Periastron epoch (T)2441738 JD
Argument of periastron (ω)
(secondary)		119°
Semi-amplitude (K1)
(primary)		11.90 km/s
Details
MassScript error: No such module "val".[7] Template:Solar mass
Radius4.5[8] Template:Solar radius
Luminosity2,873[9] Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[10] cgs
TemperatureScript error: No such module "val".[10] K
Rotational velocity (v sin i)Script error: No such module "val".[11] km/s
Age19[10] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[12]
Database references
SIMBADdata

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Xi Cassiopeiae (ξ Cassiopeiae) is a blue-white hued binary star[6] system in the northern constellation of Cassiopeia. It has an apparent visual magnitude of +4.81[2] and thus is faintly visible to the naked eye. Based upon an annual parallax shift of 2.28 mas as seen from Earth,[1] this system is located roughly 1,400 light years from the Sun. At that distance, the visual magnitude of the system is diminished by an extinction factor of 0.20 due to interstellar dust.[5] It is advancing in the general direction of the Sun with a radial velocity of roughly −10.6 km/s.[4]

This is a single-lined spectroscopic binary star system with an orbital period of 940.2 days and an eccentricity of 0.4.[6] The visible component has the spectrum of a B-type main-sequence star with a stellar classification of B2.5 V.[3] It has an estimated 10.1[7] times the mass of the Sun and around 4.5[8] times the Sun's radius. At the age of 19[10] million years, it has a high rate of rotation with a projected rotational velocity of about 139 km/s.[11] The star is radiating 2,873[9] times the Sun's luminosity from its photosphere at an effective temperature of around 15,585 K.[10]

References

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  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 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. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ a b c d e Script error: No such module "citation/CS1".
  11. ↑ a b Script error: No such module "citation/CS1".
  12. ↑ Template:Cite simbad

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Template:Stars of Cassiopeia

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