Xi1 Centauri

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ξ1 Centauri
Template:Location mark
Location of ξ1 Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Centaurus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.83[2]
Characteristics
Spectral type A0 V[3]
U−B Template:Engvar +0.014[2]
B−V Template:Engvar +0.030[2]
Astrometry
Radial velocity (Rv)Template:Val[4] km/s
Proper motion (μ) RA: −47.55[1] mas/yr
Dec.: −11.52[1] mas/yr
Parallax (π)14.79±0.27 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.68[5]
Details[6]
Mass2.39 Template:Solar mass
Radius2.7[7] Template:Solar radius
Luminosity43.2[8] Template:Solar luminosity
Surface gravity (log g)Template:Val cgs
TemperatureTemplate:Val K
Rotational velocity (v sin i)185[9] km/s
Age125 Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
ξ1 Cen, CD−48° 7887, HD 113314, HIP 63724, HR 4933, SAO 223870.[10]
Database references
SIMBADdata

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File:NGC 4945 cut test (21818932856).jpg
ξ1 Cen is the brightest star in the picture, at the right of the galaxy NGC 4945.

Xi1 Centauri, Latinized from ξ1 Centauri, is a solitary[11] star in the southern constellation of Centaurus. It is visible to the naked eye with an apparent visual magnitude of +4.83.[2] With an annual parallax shift of 14.79 mas,[1] it is located around 221 light years from the Sun. At that distance, the apparent visual magnitude of the star is diminished by an interstellar extinction factor of 0.10[12] due to intervening dust. Just 17 arc minutes to the east of Xi1 Centauri lies the galaxy NGC 4945.[13]

This is an A-type main sequence star with a stellar classification of A0 V.[3] It is about 125 million years old[6] with a relatively high rate of spin, having a projected rotational velocity of 185 km/s.[9] The star has an estimated 2.4 times the mass of the Sun[6] and about 2.7 times the Sun's radius.[7] It is radiating 43 times the solar luminosity[8] from its outer atmosphere at an effective temperature of 10,462 K.[6]

References

Template:Reflist

Template:Stars of Centaurus

  1. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named vanLeeuwen2007
  2. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named GutierrezMoreno1968
  3. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Bauwens2010
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named deBruijne2012
  5. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  6. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named David2015
  7. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named PasinettiFracassini2001
  8. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Mcdonald2012
  9. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named UesugiFukuda70
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Gontcharov2012
  13. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named OMeara2016
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