N Centauri

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N Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
A
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 5.26[2]
B
Right ascension Template:RA[3]
Declination Template:DEC[3]
Apparent magnitude (V) 7.49[2]
Characteristics
Spectral type B9V + F0Vn[4][5]
B−V Template:Engvar Template:Val[2]
Astrometry
A
Radial velocity (Rv)Template:Val[2] km/s
Proper motion (μ) RA: −38.997[1] mas/yr
Dec.: −26.863[1] mas/yr
Parallax (π)10.7449±0.0882 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+0.76[2]
Details
A
Mass3.04[6] Template:Solar mass
Radius2.458[6] Template:Solar radius
Luminosity70.18[2] Template:Solar luminosity
Surface gravity (log g)Template:Val[7] cgs
TemperatureTemplate:Val[7] K
Rotational velocity (v sin i)205[7] km/s
Age66[7] Myr
B
MassTemplate:Val[8] Template:Solar mass
RadiusTemplate:Val[8] Template:Solar radius
Luminosity6.43[9] Template:Solar luminosity
Surface gravity (log g)4.29[10] cgs
Temperature7,354[9] K
Metallicity [Fe/H]Template:Val[8] dex
AgeTemplate:Val[8] Gyr
Other designations
Template:Odlist[11]
A: Template:Odlist[11]
B: Template:Odlist[12]
Database references
SIMBADA
B

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N Centauri is a binary star[13] in the southern constellation of Centaurus. The brighter star is dimly visible to the naked eye with an apparent visual magnitude of 5.26, and it is approximately 304 light years away based on parallax. It has an absolute magnitude of +0.76 and is drifting further away from the Sun with a radial velocity of +27 km/s. It is a candidate member of the Sco OB2 moving group.[14]

The double nature of this system was discovered by German astronomer Carl Rümker in 1835. As of 2016, the companion lay at an angular separation of Template:Val along a position angle of 289° from the primary.[15] They form a co-moving pair with a projected separation of Template:Val.[16] The more luminous member is a B-type main-sequence star with a stellar classification of B9V.[13] Its fainter companion is an F-type main-sequence star with a class of F0Vn, where the 'n' suffix indicates that the metal absorption lines in its spectrum are unusual broad ("nebulous") and indicative of rapid rotation.[4][5] Based upon discrepancies in the proper motion measurements, there are hints of a third member of this system.[13]

References

Template:Reflist

Template:Stars of Centaurus

  1. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named edr3a
  2. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  3. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named edr3b
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named skiff2014
  5. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named lindroos1983
  6. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named tic
  7. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named David2015
  8. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named Bochanski2018
  9. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR2b
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named starhorse
  11. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD_A
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD_B
  13. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
  14. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Rizzuto2011
  15. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named WDSC2014
  16. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named lindroos1985
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