Psi Ophiuchi

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ψ Ophiuchi
Ophiuchus constellation map.svg
Red circle.svg

Location of ψ Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 16h 24m 06.18464s[1]
Declination −20° 02′ 14.3784″[1]
Apparent magnitude (V) 4.50[2]
Spectral type K0II-III[3]
U−B color index +0.84[2]
B−V color index +1.03[2]
Radial velocity (Rv) +0.60[4] km/s
Proper motion (μ) RA: -20.29[1] mas/yr
Dec.: -47.65[1] mas/yr
Parallax (π) 16.35 ± 0.25[1] mas
Distance 199 ± 3 ly
(61.2 ± 0.9 pc)
Absolute magnitude (MV) 0.55[5]
Mass 1.61[6] M
Radius 11.45[6] R
Luminosity 65.9[6] L
Surface gravity (log g) 2.56[6] cgs
Temperature 4,864[6] K
Metallicity [Fe/H] -0.20[6] dex
Rotational velocity (v sin i) < 1.0[7] km/s
Other designations
BD-19°4365, 4 Ophiuchi, GC 22042, HIP 80343, HR 6104, HD 147700, SAO 159892
Database references

Psi Ophiuchi (ψ Oph) is a class K0II-III[3] (orange giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.50[2] and it is approximately 199 light years away based on parallax.[1]


  1. ^ a b c d e f 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
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b 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. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  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
  6. ^ a b c d e f Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv:1412.4634Freely accessible. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360.  Vizier catalog entry
  7. ^ 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