Alpha Volantis

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Template:Short description

α Volantis
Template:Location mark
Location of α Volantis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Volans
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) +4.00[2]
Characteristics
Spectral type kA3hA5mA5 V[3]
U−B Template:Engvar +0.13[2]
B−V Template:Engvar +0.14[2]
Astrometry
Radial velocity (Rv)+4.9[4] km/s
Proper motion (μ) RA: −2.00[1] mas/yr
Dec.: +95.51[1] mas/yr
Parallax (π)26.11±0.12 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+1.60[5]
Orbit[6]
Period (P)0.652 ± 0.001 yr
Semi-major axis (a)0.0321 ± 0.0013″
Eccentricity (e)0.041 ± 0.038
Inclination (i)101.9 ± 2.3°
Longitude of the node (Ω)105.3 ± 1.4°
Periastron epoch (T)2015.593 ± 0.063
Argument of periastron (ω)
(secondary)		248.5 ± 34.2°
Details
Mass1.87[7] Template:Solar mass
Radius1.9[8] Template:Solar radius
Surface gravity (log g)4.09[3] cgs
Temperature8,198[3] K
Metallicity [Fe/H]+0.19[3] dex
Rotational velocity (v sin i)Script error: No such module "val".[9] km/s
AgeScript error: No such module "val".[10] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
CPD−65°1065, FK5 343, GJ 333.3, GJ 9284, HD 78045, HIP 44382, HR 3615, SAO 250422[11]
Database references
SIMBADdata

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Alpha Volantis (Alpha Vol), Latinized from α Volantis, is a binary star[12] system located in the southern constellation Volans. It has an apparent visual magnitude of +4.00, which is bright enough to be seen with the naked eye. Based upon parallax measurements made with the Hipparcos spacecraft, it is located at a distance of 125 light years from the Sun. As of 2010, the two components of this system had an angular separation of 0.0318″ along a position angle of 286.9°. The magnitude difference between the two components is 0.1.[13] It is considered a member of the Sirius supercluster.[5]

The primary component is an Am star with a stellar classification of kA3hA5mA5 V.[3] This notation indicates the star has the weak calcium II K-line of an A3 star, and the hydrogen and metallic lines of an A5 star.[14] It has an estimated age of 427 million years.[10] In 1992, it was found to be emitting an infrared excess, suggesting the presence of a circumstellar disk of dust.[15] However, subsequent observations have not confirmed this.[16]

References

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  3. ↑ a b c d e 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. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Template:Cite simbad
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Volans

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