HR 6384

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HR 6384
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension  17h 14m 13.40898s[1]
Declination –56° 53′ 18.6966″[1]
Apparent magnitude (V) 6.153[2]
Spectral type M1/M2II/III+A[3]
U−B color index +1.340[2]
B−V color index +1.787[2]
Variable type ellipsoidal variable
Proper motion (μ) RA: 4.22[1] mas/yr
Dec.: –5.91[1] mas/yr
Parallax (π)2.54 ± 0.76[1] mas
Distanceapprox. 1,300 ly
(approx. 400 pc)
Other designations
CD–56 6744, HD 155341, HIP 84311, HR 6384, SAO 244539, V829 Arae.[4]
Database references

HR 6384 is a star in the southern constellation of Ara, the Altar. It is a close binary star system that forms an ellipsoidal variable with a period of 80 days and an amplitude variation of 0.08 in magnitude.[5] The system is faintly visible to the naked eye with a combined apparent visual magnitude of 6.153,[2] and it is located at a distance of approximately 1,300 light-years (400 parsecs) from Earth.[1]


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c d Walker, W. S. G.; Marino, B. F.; Herdman, G. (August 1985), "Photometry of HR 6384 - an 80 Day Ellipsoidal Binary?", Information Bulletin on Variable Stars, 2775: 1, Bibcode:1985IBVS.2775....1W.
  3. ^ Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan,
  4. ^ "V829 Ara -- Ellipsoidal variable Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-28.
  5. ^ Hoffleit, Dorrit (1996), "A Catalogue of Correlations Between Eclipsing Binaries and Other Categories of Double Stars", The Journal of the American Association of Variable Star Observers, 24 (2): 105–116, Bibcode:1996JAVSO..24..105H.

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