24 Scorpii

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24 Scorpii
Ophiuchus constellation map.svg
Red circle.svg
Location of 24 Scorpii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension  16h 41m 34.38333s[1]
Declination −17° 44′ 31.7985″[1]
Apparent magnitude (V) 4.91[2]
Spectral type G7.5IICN1Ba0.4[3]
U−B color index +0.85[4]
B−V color index +1.11[4]
Radial velocity (Rv)-25.20[5] km/s
Proper motion (μ) RA: -21.08[1] mas/yr
Dec.: -0.69[1] mas/yr
Parallax (π)7.91 ± 0.30[1] mas
Distance410 ± 20 ly
(126 ± 5 pc)
Absolute magnitude (MV)-0.60[2]
Mass2.72[6] M
Radius21.43[6] R
Luminosity204[6] L
Surface gravity (log g)2.23[6] cgs
Temperature4,717[6] K
Metallicity [Fe/H]-0.13[6] dex
Rotational velocity (v sin i)5.3[7] km/s
Other designations
BD-17°4618, FK5 624, GC 22449, GJ 9574, HIP 81724, HR 6196, HD 150416, SAO 160046
Database references

24 Scorpii (24 Sco) is a class G7.5II[3] (yellow bright giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.91[2] and it is approximately 412 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:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c 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. ^ 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. ^ a b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
  5. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
  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:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. hdl:10722/215277. 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:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. Vizier catalog entry