Astronomy:58 Ophiuchi
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Short description: Star in the constellation Ophiuchus
  | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| Distance | 57.6 ± 0.2 ly (17.65 ± 0.07 pc) |
| Absolute magnitude (MV) | 3.63[2] |
| Details | |
| Mass | 1.26[6] M☉ |
| Radius | 1.3[6] R☉ |
| Luminosity | 3.02[2] L☉ |
| Surface gravity (log g) | 4.28[7] cgs |
| Temperature | 6,447[7] K |
| Metallicity [Fe/H] | −0.16[2] dex |
| Rotational velocity (v sin i) | 11.8±0.6[8] km/s |
| Age | 2.652[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. Vizier catalog entry
- ↑ 3.0 3.1 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 (1): 161–170. doi:10.1086/504637. Bibcode: 2006AJ....132..161G.
- ↑ 4.0 4.1 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M.Vizier catalog entry
- ↑ 5.0 5.1 Gontcharov, G. A. (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. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 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: 555–562. Bibcode: 1999A&A...352..555A. Vizier catalog entry
- ↑ 7.0 7.1 7.2 7.3 7.4 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. Vizier catalog entry
- ↑ 8.0 8.1 Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics 542: A116, doi:10.1051/0004-6361/201118724, Bibcode: 2012A&A...542A.116A.
- ↑ "58 Oph". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=58+Oph.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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