58 Ophiuchi

58 Ophiuchi is a single[10] star in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.86.[2] This object is approximately 57.6 light years away based on parallax,[1] and is drifting further from the Earth with a heliocentric radial velocity of +10 km/s.[5]

58 Ophiuchi
Location of 58 Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 43m 25.79370s[1]
Declination −21° 40′ 59.4980″[1]
Apparent magnitude (V) 4.86[2]
Characteristics
Spectral type F5V[3]
U−B color index -0.03[4]
B−V color index +0.47[4]
Astrometry
Radial velocity (Rv)+10.20[5] km/s
Proper motion (μ) RA: -97.54[1] mas/yr
Dec.: -44.56[1] mas/yr
Parallax (π)56.65 ± 0.24[1] mas
Distance57.6 ± 0.2 ly
(17.65 ± 0.07 pc)
Absolute magnitude (MV)3.63[2]
Details
Mass1.26[6] M☉
Radius1.3[6] R☉
Luminosity3.02[2] L☉
Surface gravity (log g)4.28[7] cgs
Temperature6,447[7] K
Metallicity [Fe/H]−0.16[2] dex
Rotational velocity (v sin i)11.8±0.6[8] km/s
Age2.652[7] Gyr
Other designations
58 Oph, BD−21°4712, FK5 1463, GC 24030, GJ 692, HD 160915, HIP 86736, HR 6595, SAO 185660[9]
Database references
SIMBADdata

This is an ordinary F-type main-sequence star with a stellar classification of F5V.[3] It is 2.7[7] billion years old with a projected rotational velocity of 12 km/s.[8] The star has an estimated 1.26 times the mass of the Sun and 1.3 times the Sun's radius.[6] It is radiating three[2] times the luminosity of the Sun from its photosphere at an effective temperature of 6,447 K.[7]

References
  1. Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 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. Vizier catalog entry
  3. Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal. 132: 161. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
  4. Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
  5. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  6. Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  7. 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. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
  8. Ammler-von Eiff, M.; Reiners, A. (2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: 31. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. A116.
  9. "58 Oph". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-21.
  10. 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.
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