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3 Persei

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3 Persei
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 01h 58m 33.50565s[1]
Declination +49° 12′ 15.6728″[1]
Apparent magnitude (V) 5.70[2]
Characteristics
Spectral type K0 IV[3]
Astrometry
Radial velocity (Rv)−0.67±0.17[4] km/s
Proper motion (μ) RA: +6.67[1] mas/yr
Dec.: +41.74[1] mas/yr
Parallax (π)13.33 ± 0.30 mas[1]
Distance245 ± 6 ly
(75 ± 2 pc)
Absolute magnitude (MV)1.33[2]
Details[5]
Mass1.41±0.17 M☉
Radius8.27±0.55 R☉
Luminosity37.2+7.5
−6.3 L☉
Surface gravity (log g)2.72±0.09 cgs
Temperature4,757±25 K
Metallicity [Fe/H]−0.15±0.05 dex
Rotational velocity (v sin i)1.85±0.45 km/s
Age2.91±0.98 Gyr
Other designations
3 Per, BD+48° 576, HD 11949, HIP 9222, HR 568, SAO 37665[6]
Database references
SIMBADdata

3 Persei is a single,[7] orange-hued star in the northern constellation of Perseus. It is dimly visible to the naked eye under good viewing conditions, having an apparent visual magnitude of 5.70[2] The star is located around 75 parsecs (240 ly) distant, based upon an annual parallax shift of 13.33±0.30 mas.[1]

This star has a stellar classification of K0 IV,[3] suggesting it is a K-type subgiant – an evolved star that has used up its core hydrogen and is evolving to become a red giant. However, da Silva et al. (2015) categorized it as a giant star proper.[8] At the age of around three billion years, it has an estimated 1.4 times the mass of the Sun and has expanded to move than 8 times the Sun's radius. It is radiating roughly 37 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,757 K.[5]

References

  1. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  3. ^ a b Cowley, A. P.; Bidelman, W. P. (February 1979), "MK spectral types for some F and G stars", Publications of the Astronomical Society of the Pacific, 91: 83–86, Bibcode:1979PASP...91...83C, doi:10.1086/130446
  4. ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, A61.
  5. ^ a b Jofré, E.; et al. (February 2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics, 574: 46, arXiv:1410.6422, Bibcode:2015A&A...574A..50J, doi:10.1051/0004-6361/201424474, A50.
  6. ^ "3 Per". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-08.
  7. ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.{{citation}}: CS1 maint: unflagged free DOI (link)
  8. ^ Da Silva, Ronaldo; et al. (2015), "Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets", Astronomy & Astrophysics, 580: A24, Bibcode:2015A&A...580A..24D, doi:10.1051/0004-6361/201525770.
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