HD 162826

HD 162826
HD 162826 is located in the constellation Pavo.
HD 162826 is located in the constellation Pavo.
HD 162826
Location of HD 162826 in the constellation Hercules

Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 17h 51m 14.02244s[1]
Declination +40° 04′ 20.8772″[1]
Apparent magnitude (V) 6.55±0.01[2]
Characteristics
Spectral type F8 V[3][4]
U−B color index +0.04[2]
B−V color index +0.52[2]
Astrometry
Radial velocity (Rv)1.9±0.1[5] km/s
Proper motion (μ) RA: −16.864 mas/yr[1]
Dec.: +9.833 mas/yr[1]
Parallax (π)30.068 ± 0.0646 mas[1]
Distance108.5 ± 0.2 ly
(33.26 ± 0.07 pc)
Absolute magnitude (MV)+3.92[6]
Details
Mass1.17[7] M☉
Radius1.32±0.04[8] R☉
Luminosity2.27[9] L☉
Surface gravity (log g)4.28+0.02
−0.03[8] cgs
Temperature6,158±9[10] K
Metallicity [Fe/H]+0.02±0.04[11] dex
Rotational velocity (v sin i)5[12][13] km/s
Age3.88[7] Gyr
Other designations
AG+40°1628, BD+40°3225, GC 24279, HD 162826, HIP 87382, HR 6669, SAO 47009, TYC 3093-1946-1, 2MASS J17511402+4004208
Database references
SIMBADdata

HD 162826 (HR 6669, HIP 87382)[14] is a star in the constellation Hercules. It is about 110 light-years (34 parsecs) away from Earth.[1] With an apparent magnitude of 6.55,[2] the star can be found with binoculars or a low-power telescope by reference to nearby Vega in the constellation Lyra.[15]

The star is considered to be a stellar sibling of the Sun and is the first such sibling to be discovered.[16] Solar siblings are those stars that formed from the same gas cloud and in the same star cluster; the term was introduced in 2009.[17][18] No planets have been detected orbiting HD 162826, but due to its metallicity, it is likely to harbor terrestrial planets; the star's spectra had been under observation previously.[19]

In November 2018, a second potential solar twin was announced, HD 186302, an 8th magnitude star in the Pavo constellation.[20]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Adams1935 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gray2001 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Nidever2002 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Dotter2008 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Takeda2007 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Muñoz Bermejo2013 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Aguilera-Gómez2018 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Wilson1966 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Kraft1967 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference Saltarin was invoked but never defined (see the help page).
  16. ^ "Astronomers find Sun's 'long-lost brother,' pave way for family reunion". Science Daily. May 10, 2014. Retrieved May 13, 2014.
  17. ^ Zwart, S. Portegies (November 2009). "The long-lost siblings of the Sun". Scientific American. 301 (5): 40–47. Bibcode:2009SciAm.301e..40P. doi:10.1038/scientificamerican1109-40. PMID 19873903. Retrieved November 11, 2014.
  18. ^ Portegies Zwart, S. (April 2009). "The Lost Siblings of the Sun". The Astrophysical Journal Letters. 696 (1): L13–L16. arXiv:0903.0237. Bibcode:2009ApJ...696L..13P. doi:10.1088/0004-637X/696/1/L13. S2CID 17168366.
  19. ^ González, G.; et al. (December 8, 2009). "Parent stars of extrasolar planets – X. Lithium abundances and v sin i revisited". MNRAS. 403 (3): 1368–1380. arXiv:0912.1621. Bibcode:2010MNRAS.403.1368G. doi:10.1111/j.1365-2966.2009.16195.x. S2CID 118520284.
  20. ^ King, Bob P. (2018-11-24). Did Astronomers Just Find The Sun’s Sister? Astro Bob, Duluth News Tribune, 24 November 2018. Originally retrieved from http://astrobob.areavoices.com/2018/11/24/did-astronomers-just-find-the-suns-sister. Archived on 2018-11-25 at https://web.archive.org/web/20181125115534/http://astrobob.areavoices.com/2018/11/24/did-astronomers-just-find-the-suns-sister/.