Astronomy:HD 186302

From HandWiki
Short description: Star in the constellation Pavo
HD 186302
Location of HD 186302 (circled)
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas
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

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, like HD 162826. 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]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. 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. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  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. et al. (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. doi:10.1051/0004-6361/202039765. Bibcode: 2021A&A...646A..77G. 
  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. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  6. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A. 
  7. ↑ Adibekyan, V.; De Laverny, P.; Recio-Blanco, A.; Sousa, S. G.; Delgado-Mena, E.; Kordopatis, G.; Ferreira, A. C. S.; Santos, N. C. et al. (2018). "The AMBRE project: Searching for the closest solar siblings". Astronomy and Astrophysics 619: A130. doi:10.1051/0004-6361/201834285. Bibcode: 2018A&A...619A.130A. 
  8. ↑ 8.0 8.1 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. doi:10.1051/0004-6361/202141339. ISSN 0004-6361. Bibcode: 2021A&A...654A.137L. 
  9. ↑ 9.0 9.1 "HD 186302". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+186302. 
  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". https://www.universetoday.com/140598/astronomers-find-one-of-the-suns-sibling-stars-born-from-the-same-solar-nebula-billion-of-years-ago/. 
  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. doi:10.1093/mnras/staa788. Bibcode: 2020MNRAS.494.2268W. 
  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, doi:10.1051/0004-6361/201423645, Bibcode: 2014A&A...564A..43B 



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_186302&oldid=4132939"