HD 160342

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 160342
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 42m 03.61953s[1]
Declination –50° 30′ 38.5221″[1]
Apparent magnitude (V) 6.35[2]
Characteristics
Spectral type M3 III[3]
U−B color index +1.96[4]
B−V color index +1.73[4]
R−I color index 0.85
Astrometry
Radial velocity (Rv) –27.1 ± 0.4[5] km/s
Proper motion (μ) RA: +2.05[1] mas/yr
Dec.: -13.96[1] mas/yr
Parallax (π) 2.71 ± 0.67[1] mas
Distance approx. 1,200 ly
(approx. 370 pc)
Other designations
CD–50 11474, HD 160342, HIP 86628, HR 6576, SAO 244954, V626 Arae.[4]

HD 160342 is the Henry Draper Catalogue designation for a star in the southern constellation of Ara. It has an apparent visual magnitude of 6.35[2] and, based upon parallax measurements, is approximately 1,200 light-years (370 parsecs) distant from Earth. This is an evolved red giant that is on the asymptotic giant branch,[2] with a stellar classification of M3 III.[3] It is a periodic variable star that changes in brightness by 0.1127 magnitudes at the rate of 0.37943 cycles per day,[6] or once every 2.6 days.

References[edit]

  1. ^ a b c d e 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 Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal 104 (1): 275–313, Bibcode:1992AJ....104..275E, doi:10.1086/116239. 
  3. ^ a b Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H. 
  4. ^ a b c "V626 Ara -- Pulsating variable Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-08-04. 
  5. ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065. 
  6. ^ Koen, Chris; Eyer, Laurent (March 2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x. 

External links[edit]