HD 162337

Last updated
HD 162337
Apus constellation map.svg
Red circle.svg
Location of HD 162337 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Apus
Right ascension 18h 05m 26.85525s [1]
Declination −81° 29′ 11.6368″ [1]
Apparent magnitude  (V)6.35±0.01 [2]
Characteristics
Spectral type K3/4 III [3]
U−B color index +1.75 [4]
B−V color index +1.50 [4]
Astrometry
Radial velocity (Rv)−3.3±0.4 [5]  km/s
Proper motion (μ)RA: +28.344  mas/yr [1]
Dec.: −48.347  mas/yr [1]
Parallax (π)3.2987 ± 0.0286  mas [1]
Distance 989 ± 9  ly
(303 ± 3  pc)
Absolute magnitude  (MV)−0.61 [6]
Details
Radius 42.0+4.2
−4.1 [7] or 67.8±1.6 [1]   R☉
Luminosity 495±13 [7] or 1,055+28
−27 [1]   L☉
Surface gravity (log g)0.71±0.01 [8]   cgs
Temperature 4,186±122 [9]   K
Metallicity [Fe/H]−0.66 [8]   dex
Rotational velocity (v sin i)<1.0 [10]  km/s
Other designations
65 G. Apodis [11] , CD−81°673, CPD−81°799, FK5  3990, GC  24431, HD  162337, HIP  88599, HR  6646, SAO  258787 [12]
Database references
SIMBAD data

HD 162337, also known as HR 6646 or rarely 65 G. Apodis, is a solitary orange-hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.35, [2] placing it near the limit for naked eye visibility, even under ideal conditions. The object is located relatively far at a distance of 989 light-years based on Gaia DR3 parallax measurements, [1] but it is drifting closer with a heliocentric radial velocity of −3.3  km/s . [5] At its current distance, HD 162337's brightness is heavily diminished by 0.45 magnitudes due to interstellar extinction [13] and it has an absolute magnitude of −0.61. [6]

HD 162337 has a stellar classification of K3/4 III, [3] indicating that it is an evolved star with the characteristics of a K3 and K4 giant star. It has expanded to 42 times the radius of the Sun [7] and now radiates 495 times the luminosity of the Sun [7] from its enlarged photosphere at an effective temperature of 4,186  K . [9] However, Gaia DR3 stellar evolution models give a larger radius of 67.8±1.6  R☉ [1] and a higher luminosity of 1,055+28
−27  L☉ . [1] HD 162337 is metal deficient with an iron abundance 21.9% that of the Sun's ([Fe/H] = −0.66) [8] and it spins too slowly for its projected rotational velocity to measured accurately. [10]

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<span class="mw-page-title-main">HD 179433</span> G-type giant; Corona Australis

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<span class="mw-page-title-main">HD 170384</span> A-type dwarf; Corona Australis

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References

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  4. 1 2 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 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.
  6. 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.
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  8. 1 2 3 Poggio, E.; Recio-Blanco, A.; Palicio, P. A.; Re Fiorentin, P.; de Laverny, P.; Drimmel, R.; Kordopatis, G.; Lattanzi, M. G.; Schultheis, M.; Spagna, A.; Spitoni, E. (30 September 2022). "The chemical signature of the Galactic spiral arms revealed by Gaia DR3". Astronomy & Astrophysics. 666: L4. arXiv: 2206.14849 . Bibcode:2022A&A...666L...4P. doi: 10.1051/0004-6361/202244361 . eISSN   1432-0746. ISSN   0004-6361.
  9. 1 2 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.
  10. 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 . eISSN   1432-0746. ISSN   0004-6361. S2CID   54046583.
  11. ↑ 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.
  12. ↑ "HD 128294". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved September 20, 2015.
  13. ↑ 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.
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