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 in spectrum and size, it was suspected to have formed in the same stellar nursery as the Sun 4.6 billion years ago.[10] However, a common origin with the Sun was found to be unlikely in a 2019 paper, as HD 186302's galactic orbit is very different from the Sun's.[11]
  | |
| 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] |
| Distance | 185.0 ± 0.2 ly (56.72 ± 0.05 pc) |
| Absolute magnitude (MV) | +5.11[6] |
| Details[7] | |
| Mass | 0.97±0.01 M☉ |
| Radius | 0.95±0.01 R☉ |
| Surface gravity (log g) | 4.47±0.01 cgs |
| Temperature | 5,675±15 K |
| Metallicity [Fe/H] | −0.03[8] dex |
| Rotational velocity (v sin i) | 2.30[8] km/s |
| Age | 4.5±0.81 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
See also
editReferences
edit- ^ a b c d e 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ a b 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.
- ^ a b "HD 186302". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 24, 2018.
- ^ 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.
- ^ 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.
- ^ 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