Lambda Telescopii

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Template:Short description

λ Telescopii
Template:Location mark
Location of λ Tel (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.84±0.01[2]
Characteristics
Spectral type B9.5 IV/V[3] or B9 III[4]
B−V Template:Engvar −0.05[5]
Astrometry
Radial velocity (Rv)−2±4.2[6] km/s
Proper motion (μ) RA: +13.365 mas/yr[1]
Dec.: −8.805 mas/yr[1]
Parallax (π)6.6117±0.1718 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−1.51[7]
Details
Mass2.81Script error: No such module "Su".[8] Template:Solar mass
Radius5.53±0.28[9] Template:Solar radius
Luminosity260Script error: No such module "Su".[1] Template:Solar luminosity
Surface gravity (log g)3.56[10] cgs
Temperature10,139[11] K
Metallicity [Fe/H]+0.19[11] dex
Rotational velocity (v sin i)110[12][13] km/s
Age268[14] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[15]
Database references
SIMBADdata

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λ Telescopii, Latinized as Lambda Telescopii, is a solitary,[16] bluish-white hued star located in the southern constellation of Telescopium. It has an apparent magnitude of 4.84,[2] making it readily visible to the naked eye under ideal conditions. Gaia DR3 parallax measurements imply a distance of 490 light years,[1] and it is currently approaching the Solar System with a somewhat constrained heliocentric radial velocity of Script error: No such module "val"..[6] At its current distance, the visual magnitude of Lambda Telescopii is diminished by an extinction of 0.25 due to interstellar dust[17] and it has an absolute magnitude of −1.51.[7]

The object has been given several stellar classifications over the years. Lambda Telescopii has been classified as B9 III (evolved giant star),[4] A0 V (A-type main-sequence star),[13] and B9 .5 IV/V.[3]

The accepted classification for Lambda Telescopii is B9.5 IV/V,[3] indicating that it is a late B-type star with the blended luminosity class of a subgiant and a main sequence star. Gaia DR3 stellar evolution models place it near the end of its main sequence lifetime.[1] The star is 268 million years old[14] with a relatively high rate of spin, showing a projected rotational velocity of Script error: No such module "val"..[12][13] Lambda Telescopii is metal enriched with an iron abundance 155% that of the Sun, or [Fe/H] = +0.19.[11] The star has 2.81 times the mass of the Sun[8] and it radiates 260 times the luminosity of the Sun[1] from its photosphere – which is 5.53 times the size of the Sun's – at an effective temperature of Script error: No such module "val"..[9][11]

References

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  1. ↑ a b c d e f g h Template:Cite DR3
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  3. ↑ a b c Script error: No such module "citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  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. ↑ a b 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 c d Script error: No such module "Citation/CS1".
  12. ↑ a b Script error: No such module "Citation/CS1".
  13. ↑ a b c Script error: No such module "Citation/CS1".
  14. ↑ a b Script error: No such module "Citation/CS1".
  15. ↑ Template:Cite simbad
  16. ↑ Script error: No such module "Citation/CS1".
  17. ↑ Script error: No such module "Citation/CS1".
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Template:Stars of Telescopium

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