HD 189831

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HD 189831
Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 20h 03m 33.45912s[1]
Declination −37° 56′ 26.5236″[1]
Apparent magnitude (V) 4.77[2]
Characteristics
Spectral type K5III[3]
U−B color index +1.68[4]
B−V color index +1.41[4]
Astrometry
Radial velocity (Rv) -38.30[5] km/s
Proper motion (μ) RA: +64.47[1] mas/yr
Dec.: -86.43[1] mas/yr
Parallax (π) 8.90 ± 0.29[1] mas
Distance 370 ± 10 ly
(112 ± 4 pc)
Absolute magnitude (MV) -0.48[2]
Details
Luminosity 316[2] L
Temperature 4,099[6] K
Rotational velocity (v sin i) < 1.0[7] km/s
Other designations
CD-38°13828, FK5 3602, GC 27779, GSC 07947-03890, HIP 98761, HR 7652, HD 189831, SAO 211767
Database references
SIMBAD data

HD 189831 is a class K5III[3] (orange giant) star in the constellation Sagittarius. Its apparent magnitude is 4.77[2] and it is approximately 366 light years away based on parallax.[1]

References[edit]

  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 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. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336. 
  6. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. Bibcode:2016A&A...591A.118S. arXiv:1605.07384Freely accessible. doi:10.1051/0004-6361/201628497. 
  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. Bibcode:2014A&A...561A.126D. arXiv:1312.3474Freely accessible. doi:10.1051/0004-6361/201220762.  Vizier catalog entry