Beta Trianguli Australis

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Template:Short description

Beta Trianguli Australis
Template:Location mark
Location of β Trianguli Australis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Triangulum Australe
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 2.85[2]
Characteristics
Spectral type F1 V[3]
U−B Template:Engvar +0.05[2]
B−V Template:Engvar +0.29[2]
Astrometry
Radial velocity (Rv)+0.4[4] km/s
Proper motion (μ) RA: −188.66[1] mas/yr
Dec.: −401.85[1] mas/yr
Parallax (π)80.79±0.16 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)+2.37[5]
Details[6]
Mass1.56[7] Template:Solar mass
RadiusScript error: No such module "val". Template:Solar radius
LuminosityScript error: No such module "val". Template:Solar luminosity
Surface gravity (log g)Script error: No such module "val".[8] cgs
TemperatureScript error: No such module "val". K
Metallicity [Fe/H]Script error: No such module "val". dex
Rotational velocity (v sin i)69.63 km/s
Age674[7] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata

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Beta Trianguli Australis, Latinized from β Trianguli Australis, is a star in the southern constellation of Triangulum Australe. It has an apparent visual magnitude of +2.85, making it the second-brightest star in the constellation. It is approximately Script error: No such module "convert". from Earth and has an apparent visual magnitude of +2.85. This star has a relatively high rate of proper motion across the celestial sphere.[9]

Characteristics

It is a F-type main-sequence star with a stellar classification of F1 V.[3] It has 1.61 times the Sun's mass[10] and 1.98 times the Sun's radius. It radiates 9.3 times the Sun's luminosity from its photosphere at an effective temperature of Script error: No such module "val".. The abundance of elements heavier than hydrogen and helium, what astronomers term metallicity, is somewhat lower than that of the Sun.[6]

Observation with the Spitzer Space Telescope reveals what appears to be an excess infrared emission from this star. This suggests the presence of circumstellar material in this system, making it a debris disk candidate.[11] This star may be a member of the Beta Pictoris moving group, an association of about 17 stars that share a common origin and a similar motion through space. If it is a member of this group, this would put the age of β TrA at about 12 million years; the same as the group itself.[12]

β TrA has a nearby visual companion, the magnitude 13.2 star LTT 6333.[10] However, it is actually a background object, with a distance of 900 light-years.[13] This star is part of the Anateus moving group, which likely has an extragalactic origin.[14]

Modern legacy

β TrA appears on the flag of Brazil, symbolising the state of Santa Catarina.[15]

References

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  1. ↑ a b c d e Script error: No such module "citation/CS1".
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  3. ↑ a b Script error: No such module "citation/CS1".
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  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b Script error: No such module "citation/CS1".
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ a b Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Template:Cite simbad
  14. ↑ Script error: No such module "citation/CS1".. See [1]
  15. ↑ Script error: No such module "citation/CS1".

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Template:Stars of Triangulum Australe

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