Lambda Octantis

λ Octantis


Location of λ Octantis (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Octans
Right ascension 21h 50m 54.56355s[1]
Declination −82° 43′ 08.0450″[1]
Apparent magnitude (V) 5.27[2]
Characteristics
Spectral type G8-K0III[3]
U−B color index +0.47[4]
B−V color index +0.75[4]
Astrometry
Radial velocity (Rv)-10.50[5] km/s
Proper motion (μ) RA: +68.14[1] mas/yr
Dec.: -31.86[1] mas/yr
Parallax (π)7.97 ± 0.45[1] mas
Distance410 ± 20 ly
(125 ± 7 pc)
Absolute magnitude (MV)-0.21[2]
Details
Luminosity121[2] L☉
Temperature5,297[6] K
Rotational velocity (v sin i)1.8[7] km/s
Other designations
CCDM J21509-8243AB, GC 30472, HIP 107843, HR 8280, HD 206240, SAO 258914, WDS J21509-8243AB
Database references
SIMBADdata

Lambda Octantis (λ Oct) is a class G8-K0III[3] (yellow giant) star in the constellation Octans. Its apparent magnitude is 5.27[2] and it is approximately 410 light years away based on parallax.[1]

The primary has one companion, B, with stellar type A3, magnitude 7.25, and separation 3.233".[8]

References

  1. 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 Freely accessible. doi:10.1134/S1063773712050015. Vizier catalog entry
  3. 1 2 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. 1 2 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. ↑ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
  6. ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. Vizier catalog entry
  7. ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. Bibcode:2014A&A...561A.126D. arXiv:1312.3474 Freely accessible. doi:10.1051/0004-6361/201220762. Vizier catalog entry
  8. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869. Bibcode:2008MNRAS.389..869E. arXiv:0806.2878 Freely accessible. doi:10.1111/j.1365-2966.2008.13596.x. Vizier catalog entry
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