Astronomy:HD 83380

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Short description: Star in the constellation Antlia
HD 83380
Observation data
Epoch J2000.0   Equinox (celestial coordinates)
Constellation Antlia
Right ascension  09h 37m 09.89308s[1]
Declination −32° 10′ 43.2374″[1]
Apparent magnitude (V) 5.62[2]
Characteristics
Evolutionary stage red giant branch[3]
Spectral type K1 III[4]
B−V color index +1.02[5]
Astrometry
Radial velocity (Rv)−2.6±0.6[6] km/s
Proper motion (μ) RA: +27.757[1] mas/yr
Dec.: −15.640[1] mas/yr
Parallax (π)10.4548 ± 0.0533[1] mas
Distance312 ± 2 ly
(95.6 ± 0.5 pc)
Absolute magnitude (MV)+0.69[7]
Details[7]
Mass2.17±0.11 M☉
Radius10.3±0.2 R☉
Luminosity55.2±1.6 L☉
Surface gravity (log g)2.9±0.1 cgs
Temperature4,905±42 K
Metallicity [Fe/H]+0.10±0.03 dex
Rotational velocity (v sin i)<1.4[8] km/s
Other designations
CD−31°7458, CPD−31°2797, FK5 1248, HD 83380, HIP 47199, HR 3833, SAO 200561[9]
Database references
SIMBADdata

HD 83380 (HR 3833) is an orange-hued star in the southern constellation of Antlia. It shines faintly with a apparent magnitude of 5.62[2] when viewed in ideal conditions. Parallax measurements place the object at distance of 312 light-years.[1] It has a heliocentric radial velocity of −2.6 km/s,[6] indicating that it is drifting towards the Solar System.

HD 83380 has a stellar classification of K1 III,[4] indicating that it is an evolved red giant. Gaia DR3 stellar evolution models place the object on the red giant branch.[3] At present it has 2.17 times the mass of the Sun and an enlarged radius of 10.3 R☉.[7] It shines with a luminosity 55 times greater than the Sun from its photosphere at an effective temperature of 4,905 K.[7] HD 83380 is slightly metal enriched with a metallicity 126% that of the Sun.[7] It spins with a projected rotational velocity too low to be measured accurately,[8] and is believed to be a member of the thin disk population.[10]

The multiplicity status of HD 83380 isn't generally agreed on. De Mederios et al. (2014) found it to be a probable spectroscopic binary[8] while Eggleton and Tokovinin (2008) list it as a solitary star.[11]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G.  Gaia EDR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ 4.0 4.1 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26°. Bibcode: 1982mcts.book.....H. 
  5. ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J. 
  6. ↑ 6.0 6.1 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V. et al. (January 2022). "CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars". Astronomy & Astrophysics 657: A87. doi:10.1051/0004-6361/202040078. ISSN 0004-6361. Bibcode: 2022A&A...657A..87O. 
  8. ↑ 8.0 8.1 8.2 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D. 
  9. ↑ "HD 83380". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+83380. 
  10. ↑ Eggen, Olin J. (January 1989). "Large and Kinematically Unbiased Samples of G- and K-Type Stars. III. Evolved Young Disk Stars in the Bright Star Sample". Publications of the Astronomical Society of the Pacific 101: 54. doi:10.1086/132404. ISSN 0004-6280. Bibcode: 1989PASP..101...54E. 
  11. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E. 
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