82 Aquarii

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82 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 23h 02m 32.55735s[1]
Declination –06° 34′ 26.4404″[1]
Apparent magnitude (V) 6.15[2]
Characteristics
Spectral type M2 III[3]
U−B color index +1.90[2]
B−V color index +1.58[2]
Astrometry
Radial velocity (Rv) –8[4] km/s
Proper motion (μ) RA: –5.75[1] mas/yr
Dec.: –34.02[1] mas/yr
Parallax (π) 2.24 ± 0.62[1] mas
Distance approx. 1,500 ly
(approx. 400 pc)
Other designations
BD–07 5913, HD 217701, HIP 113781, HR 8763, SAO 146465.[5]

82 Aquarii is the Flamsteed designation for a star in the equatorial constellation of Aquarius. It has an apparent visual magnitude of 6.15,[2] which, according to the Bortle Dark-Sky Scale, means it is a faint star that requires dark rural skies to view. The annual parallax shift of 82 Aquarii is 2.24 ± 0.62 milliarcseconds, which equates to a distance of roughly 1,500 light-years (460 parsecs) from Earth.[1] This is a red giant star with a stellar classification of M2 III.[3]

References[edit]

  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 Johnson, H. L. et al. (1966), UBVRIJKL photometry of the bright stars, Communications of the Lunar and Planetary Laboratory 4 (99), Bibcode:1966CoLPL...4...99J. 
  3. ^ a b Epchtein, N. (January 2004), J - K DENIS photometry of a VLTI-selected sample of bright southern stars, Astronomy and Astrophysics 413: 1037–1043, Bibcode:2004A&A...413.1037K, doi:10.1051/0004-6361:20031576. 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W. 
  5. ^ 82 Aqr -- Variable Star, SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), retrieved 2012-07-16. 

External links[edit]