Astronomy:58 Andromedae

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Short description: Star in the constellation Andromeda
58 Andromedae
Location of 58 Andromedae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  02h 08m 29.25999s[2]
Declination +37° 51′ 32.6861″[2]
Apparent magnitude (V) 4.78[1]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A5 IV-V[4]
B−V color index 0.120±0.003[1]
Astrometry
Radial velocity (Rv)7.60±1.78[1] km/s
Proper motion (μ) RA: +154.296[2] mas/yr
Dec.: −43.304[2] mas/yr
Parallax (π)17.5326 ± 0.2911[2] mas
Distance186 ± 3 ly
(57.0 ± 0.9 pc)
Absolute magnitude (MV)0.94[1]
Details[5]
Mass2.00 M☉
Radius1.9[6] R☉
Luminosity35.55[1] L☉
Surface gravity (log g)3.89±0.14 cgs
Temperature8,875±302 K
Metallicity [Fe/H]−0.98[7] dex
Rotational velocity (v sin i)135[8] km/s
Age425 Myr
Other designations
58 And, BD+37°486, HD 13041, HIP 9977, HR 620, SAO 55289, PPM 66995[9]
Database references
SIMBADdata

58 Andromedae, abbreviated 58 And, is a single[10] star in the northern constellation Andromeda. 58 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 4.78[1] The distance to this star, as determined from its annual parallax shift of 17.5 mas,[2] is 186 light years. 58 And is moving further from the Earth with a heliocentric radial velocity of +8 km/s.[1] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.159″ per year.[11]

This star is 425 million years old with a stellar classification of A5 IV-V,[4] indicating the spectrum displays mixed traits of an A-type main-sequence star and an older subgiant star. It is spinning rapidly with a projected rotational velocity of 135 km/s, which is giving the star an oblate shape with an equatorial bulge that is 6% larger than the polar radius.[8] The star has double[5] the mass of the Sun and about 1.9[6] times the Sun's radius. It is radiating 36[1] times the Sun's luminosity from its photosphere at an effective temperature of 8,875 K.[5]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. 
  3. ↑ Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z. 
  4. ↑ 4.0 4.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C. 
  5. ↑ 5.0 5.1 5.2 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal 804 (2): 146, doi:10.1088/0004-637X/804/2/146, Bibcode: 2015ApJ...804..146D. 
  6. ↑ 6.0 6.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367 (2): 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  7. ↑ Gebran, M. et al. (2016), "A new method for the inversion of atmospheric parameters of A/Am stars", Astronomy & Astrophysics 589: A83, doi:10.1051/0004-6361/201528052, Bibcode: 2016A&A...589A..83G. 
  8. ↑ 8.0 8.1 van Belle, Gerard T. (March 2012), "Interferometric observations of rapidly rotating stars", The Astronomy and Astrophysics Review 20 (1): 51, doi:10.1007/s00159-012-0051-2, Bibcode: 2012A&ARv..20...51V. 
  9. ↑ "58 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=58+And. 
  10. ↑ De Rosa, R. J. et al. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216–1240, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D. 
  11. ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L. 



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