Astronomy:HD 190056

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Short description: Star in the constellation Sagittarius
HD 190056
Observation data
Equinox J2000.0]] (ICRS)
Constellation Sagittarius
Right ascension  20h 04m 19.59387s[1]
Declination −32° 03′ 22.6729″[1]
Apparent magnitude (V) 4.99[2]
Characteristics
Spectral type K1III[3]
U−B color index +1.18[4]
B−V color index +1.21[4]
Variable type suspected[5]
Astrometry
Radial velocity (Rv)-11.80[6] km/s
Proper motion (μ) RA: +45.07[1] mas/yr
Dec.: -11.74[1] mas/yr
Parallax (π)11.22 ± 0.25[1] mas
Distance291 ± 6 ly
(89 ± 2 pc)
Absolute magnitude (MV)0.24[2]
Details
Mass1.48[7] M☉
Radius19[7] R☉
Luminosity121[2] L☉
Surface gravity (log g)2.05[7] cgs
Temperature4,467[7] K
Metallicity [Fe/H]-0.53[2] dex
Rotational velocity (v sin i)< 1.0[8] km/s
Other designations
CD-32°15682, CCDM J20043-3203A, FK5 3606, GC 27811, HIP 98842, HR 7659, HD 190056, NSV 12746, SAO 211782, WDS J20043-3203A
Database references
SIMBADdata

HD 190056 is a class K1III[3] (orange giant) star in the constellation Sagittarius. Its apparent magnitude is 4.99[2] and it is approximately 291 light years away based on parallax.[1]

It is a suspected variable,[5] and the primary has one companion, B, with magnitude 12.7 and separation 54.4".[9]

References

  1. ↑ 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. ↑ 2.0 2.1 2.2 2.3 2.4 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. ↑ 3.0 3.1 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. ↑ 4.0 4.1 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. ↑ 5.0 5.1 Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1. Bibcode: 2009yCat....102025S. 
  6. ↑ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode: 1953GCRV..C......0W. 
  7. ↑ 7.0 7.1 7.2 7.3 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
  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. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D.  Vizier catalog entry
  9. ↑ 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. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M.  Vizier catalog entry




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