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HD 186302 (also designated HIP 97507)[9] is a star in the constellation of Pavo. It is 185 light-years (57 parsecs) away from Earth, with an apparent magnitude of 8.76.[9] It was identified in November 2018 as a potential solar sibling to the Sun. Similar by spectrum and size, it was suspected to have formed in the same stellar nursery as the Sun 4.6 billion years ago.[10] Common origin with Sun was found to be unlikely in a 2019 paper, as HD 186302's galactic orbit is very different from Sun's.[11]

HD 186302
Location of HD 186302 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Pavo
Right ascension 19h 49m 06.43036s[1]
Declination −70° 11′ 16.7033″[1]
Apparent magnitude (V) 8.76±0.01[2]
Characteristics
Spectral type G3/5 V[3]
B−V color index 0.67[4]
Astrometry
Radial velocity (Rv)−1.3±0.3[5] km/s
Proper motion (μ) RA: −24.004[1] mas/yr
Dec.: −38.804[1] mas/yr
Parallax (π)17.6309 ± 0.0147 mas[1]
Distance185.0 ± 0.2 ly
(56.72 ± 0.05 pc)
Absolute magnitude (MV)+5.11[6]
Details[7]
Mass0.97±0.01 M☉
Radius0.95±0.01 R☉
Surface gravity (log g)4.47±0.01 cgs
Temperature5,675±15 K
Metallicity [Fe/H]−0.03[8] dex
Rotational velocity (v sin i)2.30[8] km/s
Age4.5±0.81 Gyr
Other designations
HD 186302, HIP 97507, 2MASS J19490644-7011167, CD−70°1724
Database references
SIMBADdata

See also



References


  1. 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. 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. Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode:1975mcts.book.....H.
  4. Gomes Da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; De Laverny, P.; Recio-Blanco, A.; Lovis, C. (2021). "Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample. I. A catalogue of homogeneous chromospheric activity". Astronomy and Astrophysics. 646: A77. arXiv:2012.10199. Bibcode:2021A&A...646A..77G. doi:10.1051/0004-6361/202039765. S2CID 242898977.
  5. 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. 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.
  7. Adibekyan, V.; De Laverny, P.; Recio-Blanco, A.; Sousa, S. G.; Delgado-Mena, E.; Kordopatis, G.; Ferreira, A. C. S.; Santos, N. C.; Hakobyan, A. A.; Tsantaki, M. (2018). "The AMBRE project: Searching for the closest solar siblings". Astronomy and Astrophysics. 619: A130. arXiv:1810.01813. Bibcode:2018A&A...619A.130A. doi:10.1051/0004-6361/201834285. S2CID 119202092.
  8. Llorente de Andrés, F.; Chavero, C.; de la Reza, R.; Roca-Fàbrega, S.; Cifuentes, C. (October 2021). "The evolution of lithium in FGK dwarf stars". Astronomy & Astrophysics. 654: A137. arXiv:2108.05852. Bibcode:2021A&A...654A.137L. doi:10.1051/0004-6361/202141339. eISSN 1432-0746. ISSN 0004-6361.
  9. "HD 186302". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 24, 2018.
  10. Matt Williams (2018-11-21). "Astronomers Find One of the Sun's Sibling Stars. Born From the Same Solar Nebula Billions of Years Ago". Universe Today. Retrieved 2022-10-07.
  11. Leung, Henry W.; MacKereth, J Ted; Hunt, Jason A S.; Portegies Zwart, Simon; Bovy, Jo; Price-Jones, Natalie; Webb, Jeremy J. (2020). "Searching for solar siblings in APOGEE and Gaia DR2 with N-body simulations". Monthly Notices of the Royal Astronomical Society. 494 (2): 2268–2279. arXiv:1910.01646. Bibcode:2020MNRAS.494.2268W. doi:10.1093/mnras/staa788.
  12. Batista, S. F. A.; Adibekyan, V. Zh.; Sousa, S. G.; Santos, N. C.; Delgado Mena, E.; Hakobyan, A. A. (2014), "Searching for solar siblings among the HARPS data", Astronomy & Astrophysics, 564: A43, arXiv:1403.1506, Bibcode:2014A&A...564A..43B, doi:10.1051/0004-6361/201423645, S2CID 56197806

На других языках

- [en] HD 186302

[es] HD 186302

La estrella HD 186302 ubicada en RA 19h 49 '06,43 ″ DEC -70 ° 11′ 16,70 ″, con una magnitud aparente de 8,4, reside dentro de la constelación de Pavo a una distancia de aproximadamente 184 años luz del sistema solar. En noviembre de 2018, HD 186302 se determinó como la segunda estrella identificada como hermana solar, esta es particularmente parecida al Sol, el mismo espectro G2, prácticamente la misma masa, con un espectro que revela una metalicidad idéntica. La estrella es de secuencia principal. La estrella tiene aproximadamente la misma edad, metalicidad, abundancia química e incluso proporciones de isótopos de carbono que el Sol.

[ru] HD 186302

HD 186302 (HIP 97507) — звезда в созвездии Павлина. Находится на расстоянии в 184,1 ± 0,3 световых года (56,45 ± 0,10 парсек) от Солнца[1]. Звезда HD 186302 является аналогом Солнца, имея похожий спектральный класс G, размер и возраст.


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