41 Ophiuchi

41 Ophiuchi


Location of 41 Ophiuchi (circled)

Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 16m 36.687s[1]
Declination 0° 26′ 43.15″[1]
Apparent magnitude (V) 4.72[2]
Characteristics
Spectral type K2III[3]
U−B color index +1.11[4]
B−V color index +1.15[4]
Astrometry
Radial velocity (Rv)-0.16[5] km/s
Proper motion (μ) RA: -31.46[6] mas/yr
Dec.: -63.13[6] mas/yr
Parallax (π)15.85 ± 0.57[6] mas
Distance206 ± 7 ly
(63 ± 2 pc)
Absolute magnitude (MV)0.72[2]
Details
Mass1.60[7] M☉
Radius13[7] R☉
Luminosity69.92[2] L☉
Surface gravity (log g)2.42[7] cgs
Temperature4,571[7] K
Metallicity [Fe/H]+0.06[2] dex
Rotational velocity (v sin i)< 1.0[8] km/s
Other designations
BD-00°3255, CCDM J17166-0027AB, GC 23320, HIP 84514, HR 6415, HD 156266, SAO 141586, WDS J17166-0027AB
Database references
SIMBADdata

41 Ophiuchi is a class K2III[3] (orange giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.72[2] and it is approximately 206 light years away based on parallax.[6]

A binary star, it has one companion, B, with magnitude 7.51 and a period of 206.3 years and eccentricity 0.55.[9][10]

References

  1. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
  2. 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
  3. 1 2 Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. 1 2 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. ↑ Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209.
  6. 1 2 3 4 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  7. 1 2 3 4 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/9911002Freely accessible. Bibcode:1999A&A...352..555A. Vizier catalog entry
  8. ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474Freely accessible. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. Vizier catalog entry
  9. ↑ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. Vizier catalog entry
  10. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. Vizier catalog entry
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