HD 82205

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HD 82205
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Antlia
Right ascension 09h 29m 54.5048s [1]
Declination −26° 35′ 22.6154″ [1]
Apparent magnitude  (V)5.48±0.01 [2]
Characteristics
Spectral type K3 III [3]
B−V color index +1.36 [4]
Astrometry
Radial velocity (Rv)12±2 [5] km/s
Proper motion (μ)RA: −21.883 mas/yr [1]
Dec.: +0.761 mas/yr [1]
Parallax (π)4.0447±0.0731  mas [1]
Distance 810 ± 10  ly
(247 ± 4  pc)
Absolute magnitude  (MV)−1.42 [6]
Details
Mass 4.46 [7]   M☉
Radius 38.86 [8]   R☉
Luminosity 552 [9]   L☉
Surface gravity (log g)1.61±0.01 [10]   cgs
Temperature 4,413±122 [8]   K
Metallicity [Fe/H]+0.09 [11]   dex
Rotational velocity (v sin i)<1 [12]  km/s
Other designations
3 G. Antliae [13] , CD−26°7117, GC 13110, HD 82205, HR 3770, SAO 177546, WDS J09299-2635A [14]
Database references
SIMBAD data

HD 82205 (HR 3770) is a solitary star [15] in the southern constellation Antlia. It is faintly visible to the naked eye with an apparent magnitude of 5.48 [2] and is estimated to be 810 light years [1] distant based on parallax measurements. However, it is receding with a heliocentric radial velocity of 12  km/s . [5]

HD 82205 has a general stellar classification of K3 III, indicating that it is a red giant. However, Houk and Cowley (1982) found a slightly warmer class of K2 III CNII, [16] which also suggests a strong overabundance of cyano radicals in the stellar atmosphere. At present it has 4.46 times the mass of the Sun [7] but has expanded to 38.9 times its girth. [8] It shines with a luminosity of 552  L☉ [9] from its enlarged photosphere at an effective temperature of 4,413  K , [8] giving an orange hue. HD 82205 has a metallicity 123% that of the Sun and is believed to be a member of the thin disk population. [11] Currently, it spins with a projected rotational velocity lower than 1  km/s . [12]

There is a 14th magnitude optical companion separated 12.4  arcseconds away along a position angle of 131° . [17] The object was first noticed by T.J.J See in 1897. [18]

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  3. ↑ Abt, H. A. (September 1985). "Visual multiples. VIII - 1000 MK types". The Astrophysical Journal Supplement Series. 59: 95. Bibcode:1985ApJS...59...95A. doi: 10.1086/191064 . eISSN   1538-4365. ISSN   0067-0049.
  4. ↑ 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.
  5. 1 2 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication: 0. Bibcode:1953GCRV..C......0W.
  6. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN   1562-6873. ISSN   1063-7737. S2CID   255204555.
  7. 1 2 Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv: 2109.10912 . Bibcode:2022A&A...657A...7K. doi: 10.1051/0004-6361/202142146 . eISSN   1432-0746. ISSN   0004-6361.
  8. 1 2 3 4 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . ISSN   0004-6256.
  9. 1 2 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037 . Bibcode:2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x . ISSN   0035-8711.
  10. ↑ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  11. 1 2 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. Bibcode:1989PASP..101...54E. doi: 10.1086/132404 . eISSN   1538-3873. ISSN   0004-6280.
  12. 1 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. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . ISSN   0004-6361.
  13. ↑ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  14. ↑ "HR 3770". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved July 18, 2022.
  15. ↑ 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. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711.
  16. ↑ Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
  17. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . ISSN   0004-6256.
  18. ↑ See, T. J. J. (1897). "New Double Stars in the Southern Hemisphere discovered at the Lowell Observatory". Astronomische Nachrichten (in German). 143 (23–24): 413–416. Bibcode:1897AN....143..413S. doi:10.1002/asna.18971432305. eISSN   1521-3994. ISSN   0004-6337.
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