Rho Centauri

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Template:Short description

Rho Centauri
Template:Location mark
Location of ρ Centauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +3.97[2]
Characteristics
Evolutionary stage main sequence
Spectral type B3 V[3]
U−B Template:Engvar −0.650[4]
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: −43.741[1] mas/yr
Dec.: −11.771[1] mas/yr
Parallax (π)11.8348±0.3746 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−1.33[2]
Details
MassScript error: No such module "val".[6] Template:Solar mass
Radius3.8[7] Template:Solar radius
Luminosity810.42[2] Template:Solar luminosity
Surface gravity (log g)3.95[8] cgs
Temperature19,500[8] K
Rotational velocity (v sin i)147[9] km/s
AgeScript error: No such module "val".[6] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Rho Centauri, Latinized from ρ Centauri, is a binary star[11] system in the southern constellation of Centaurus. It is visible to the naked eye as a blue-white hued point of light with a combined apparent visual magnitude of +3.97.[2] The system is located approximately 276 light years from the Sun based on parallax, and is drifting further away with a radial velocity of around +15 km/s.[5] It is a proper motion member of the Lower Centaurus–Crux sub-group in the Scorpius–Centaurus OB association, the nearest such association of co-moving massive stars to the Sun.[3]

The primary component of this system is a B-type main-sequence star with a stellar classification of B3 V.[3] It is about 24[6] million years old with a high rate of spin, showing a projected rotational velocity of 147 km/s.[9] It has 6.6[6] times the mass of the Sun and 3.8[7] times the Sun's radius. The star is radiating 810[2] times the luminosity of the Sun from its photosphere at an effective temperature of 19,500 K.[8]

The secondary companion is 1.1 magnitudes fainter than the primary, with a projected separation of Script error: No such module "val". along a position angle of 19.72°, as of 2013.[11]

References

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  1. ↑ a b c d e Template:Cite DR2
  2. ↑ a b c d e f Script error: No such module "citation/CS1".
  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ 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. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ a b c Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ Script error: No such module "citation/CS1".
  11. ↑ a b Script error: No such module "citation/CS1".

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Template:Stars of Centaurus

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