Lambda Coronae Australis

λ Coronae Australis
Observation data
Epoch J2000      Equinox J2000
Constellation Corona Australis
Right ascension 18h 43m 46.94185s[1]
Declination −38° 19′ 24.3885″[1]
Apparent magnitude (V) 5.11[2]
Characteristics
Spectral type A0/1V[3]
B−V color index 0.075[2]
Astrometry
Radial velocity (Rv)-26.40 ± 4.2[4] km/s
Proper motion (μ) RA: 1.05[1] mas/yr
Dec.: -53.76[1] mas/yr
Parallax (π)15.89 ± 0.33[1] mas
Distance205 ± 4 ly
(63 ± 1 pc)
Absolute magnitude (MV)1.15[2]
Details[2]
Mass2.17 ± 0.10 M☉
Radius2.24 R☉
Surface gravity (log g)4.08 ± 0.08 cgs
Temperature8710 K
Other designations
CD−38° 13036, HD 172777, HIP 91875, HR 7021, SAO 210501
Database references
SIMBADdata

Lambda Coronae Australis (λ CrA) is a star located in the constellation Corona Australis. Its apparent magnitude is 5.11.[2]

Lambda Coronae Australis is triple star system, with components A, B, and C. Lambda Coronae Australis A is an A-type main-sequence star with an absolute visual magnitude of 1.15.[2] Lambda Coronae Australis B, also known as CD-38 13036B, is a companion star with an apparent visual magnitude of 9.6.[5] Lambda Coronae Australis C, also known as CD-38 13036C, is another companion.[6] The system is located at a distance of 63 parsecs, or 205 light-years, based on parallax.[1]

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 5 6 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555–562. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A.
  3. ↑ Houk, N.; Smith-Moore, M. (1988). "Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume 4, Declinations -26°.0 to -12°.0". Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. 4. Bibcode:1988mcts.book.....H.
  4. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. ↑ "CD-38 13036B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 August 2017.
  6. ↑ "CD-38 13036C". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 August 2017.


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