HD 169853

Last updated
HD 169853
Corona Australis constellation map.svg
Red circle.svg
Location of HD 169853 (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension 18h 28m 27.11405s [1]
Declination −38° 59′ 44.4102″ [1]
Apparent magnitude  (V)5.62±0.01 [2]
Characteristics
Spectral type A2m A2-F0 [3] or A3 III [4]
B−V color index +0.13 [5]
Astrometry
Radial velocity (Rv)−21.3±1.2 [6]  km/s
Proper motion (μ)RA: +0.096  mas/yr [1]
Dec.: −41.093  mas/yr [1]
Parallax (π)8.3424 ± 0.0673  mas [1]
Distance 391 ± 3  ly
(119.9 ± 1.0  pc)
Absolute magnitude  (MV)+0.13 [7]
Details
Mass 2.09+0.39
−0.25 [8]   M☉
Radius 3.72±0.12 [9]   R☉
Luminosity 60.7+1.0
−1.1 [1]   L☉
Surface gravity (log g)3.64 [10]   cgs
Temperature 8,437±164 [8]   K
Metallicity [Fe/H]−0.01 [11]   dex
Rotational velocity (v sin i)22.6±0.3 [12]  km/s
Age 585+67
−66 [1]   Myr
Other designations
9 G. Coronae Australis [13] , CD−39°12626, CPD−39°8093, GC  25185, HD  169853, HIP  90541, HR  6910, SAO  210197 [14]
Database references
SIMBAD data

HD 169853, also known as HR 6910 or rarely 9 G. Coronae Australis, is a solitary star [15] located in the southern constellation Corona Australis. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.62. [2] Gaia DR3 parallax measurements imply a distance of 391 light years, [1] and it is currently approaching the Solar System with a heliocentric radial velocity of −21.3  km/s . [6] At its current distance, HD 169853's brightness is diminished by 0.36 magnitudes due to extinction from interstellar dust [16] and it has an absolute magnitude of +0.13. [7]

HD 169853 has a stellar classification of A2mA2-F0, [3] indicating that it is an Am star with the calcium H lines of an A2 star and the metallic lines of an F0 star. Abt and Morell (1995) give a class of A3 III, [4] indicating that the object is instead an evolved A-type giant star with no chemical peculiarities. A paper published in late 1987 found that HD 169853 had an overabundance of silicon, manganese, strontium, and barium. [17]

The object has 2.09 times the mass of the Sun [8] and a slightly enlarged radius of 3.72  R☉. [9] It radiates 60.7 times the luminosity of the Sun [1] from its photosphere at an effective temperature of 8,437  K . [8] It has a near solar metallicity at (Fe/H) = −0.01 [11] and it is estimated to be 585 million years old, having completed 80% of its main sequence lifetime. [1] Like many chemically peculiar stars, HD 169853 rotates rather slowly, having a projected rotational velocity of 22.6  km/s . [12]

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<span class="mw-page-title-main">32 Leonis Minoris</span> Star in the constellation Leo Minor

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References

  1. 1 2 3 4 5 6 7 8 9 10 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics . arXiv: 2208.00211 . doi: 10.1051/0004-6361/202243940 . Gaia DR3 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. S2CID   17128864.
  3. 1 2 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Declinations −40° to −26°. Vol. 3. Bibcode:1982mcts.book.....H.
  4. 1 2 Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi: 10.1086/192182 . ISSN   0067-0049.
  5. ↑ Corben, P. M. (April 1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astronomical Society of South Africa. 30 (4): 37. Bibcode:1971MNSSA..30...37C. ISSN   0024-8266.
  6. 1 2 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. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  7. 1 2 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   119257644.
  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 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
  9. 1 2 Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180 . Bibcode:2004A&A...426..297K. doi: 10.1051/0004-6361:20035930 . eISSN   1432-0746. ISSN   0004-6361.
  10. ↑ Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . eISSN   1432-0746. ISSN   0004-6361. S2CID   131780028.
  11. 1 2 Gontcharov, G. A. (December 2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771–782. arXiv: 1606.08814 . Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. eISSN   1562-6873. ISSN   1063-7737. S2CID   118345778.
  12. 1 2 Díaz, C. G.; González, J. F.; Levato, H.; Grosso, M. (July 2011). "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum". Astronomy & Astrophysics. 531: A143. arXiv: 1012.4858 . Bibcode:2011A&A...531A.143D. doi: 10.1051/0004-6361/201016386 . eISSN   1432-0746. ISSN   0004-6361. S2CID   119286673.
  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. ↑ "HD 169853". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved May 17, 2023.
  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. S2CID   14878976.
  16. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.
  17. ↑ Lodén, L. O.; Sundman, A. (December 1987). "Experiments with CP stars". Journal of Astrophysics and Astronomy. 8 (4): 351–367. Bibcode:1987JApA....8..351L. doi:10.1007/BF02714899. eISSN   0973-7758. ISSN   0250-6335. S2CID   123172433.
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