56 Sagittarii

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56 Sagittarii
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 19h 46m 21.73912s[1]
Declination −19° 45′ 40.0132″[1]
Apparent magnitude (V) 4.87[2]
Spectral type K1III[3]
U−B color index +0.96[4]
B−V color index +1.06[4]
Radial velocity (Rv) +22.07[5] km/s
Proper motion (μ) RA: -129.40[1] mas/yr
Dec.: -90.55[1] mas/yr
Parallax (π) 15.71 ± 0.23[1] mas
Distance 208 ± 3 ly
(63.7 ± 0.9 pc)
Absolute magnitude (MV) 0.85[2]
Mass 1.77[6] M
Radius 11[6] R
Luminosity 58.97[2] L
Surface gravity (log g) 2.58[7] cgs
Temperature 4,750[8] K
Metallicity [Fe/H] -0.07[7] dex
Rotational velocity (v sin i) < 1.1[9] km/s
Other designations
f Sagittarii, BD-20°5698, FK5 1517, GC 27349, GSC 06320-02845, HIP 97290, HR 7515, HD 186648, SAO 162964
Database references

56 Sagittarii (56 Sgr) is a class K1III[3] (orange giant) star in the constellation Sagittarius. Its apparent magnitude is 4.87[2] and it is approximately 208 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. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. 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. ^ 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. ^ a b 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. Bibcode:1999A&A...352..555A. arXiv:astro-ph/9911002Freely accessible.  Vizier catalog entry
  7. ^ a b Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. Bibcode:2011A&A...525A..71W. arXiv:1009.1491Freely accessible. doi:10.1051/0004-6361/201015014. 
  8. ^ Gontcharov, G. A. (2009). "Red giant clump in the Tycho-2 catalogue". Astronomy Letters. 34 (11): 785. Bibcode:2008AstL...34..785G. arXiv:1607.00619Freely accessible. doi:10.1134/S1063773708110078.  Vizier catalog entry
  9. ^ 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. Bibcode:2014A&A...561A.126D. arXiv:1312.3474Freely accessible. doi:10.1051/0004-6361/201220762.  Vizier catalog entry