Astronomy:83 Aquarii

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Short description: Binary star in the constellation Aquarius
83 Aquarii
Aquarius constellation map.svg
Red circle.svg
Location of 83 Aquarii (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquarius
Right ascension  23h 05m 09.78684s[1]
Declination –07° 41′ 37.6853″[1]
Apparent magnitude (V) 5.43[2] (6.20/6.34)[3]
Characteristics
Spectral type F2 Vn + F2 V[3]
U−B color index +0.07[2]
B−V color index +0.30[2]
Astrometry
Radial velocity (Rv)–13[4] km/s
Proper motion (μ) RA: +122.41[1] mas/yr
Dec.: +7.11[1] mas/yr
Parallax (π)15.57 ± 0.61[1] mas
Distance209 ± 8 ly
(64 ± 3 pc)
Orbit[5]
Companion83 Aquarii B
Period (P)21.840 ± 0.019 yr
Semi-major axis (a)0.2026 ± 0.0007
Eccentricity (e)0.3878 ± 0.0025
Inclination (i)48.01 ± 0.42°
Longitude of the node (Ω)204.87 ± 0.50°
Periastron epoch (T)1983.108 ± 0.022
Argument of periastron (ω)
(secondary)
82.83 ± 0.45°
Other designations
BD–08 6018, h Aquarii,[6] HD 218060, HIP 113996, HR 8782, SAO 146498.[7]
Database references
SIMBADdata

83 Aquarii (abbreviated 83 Aqr) is a binary star system in the equatorial constellation of Aquarius. The combined apparent visual magnitude of the pair is 5.43,[2] which is faintly visible to the naked eye. Based upon an annual parallax shift of 15.57 milliarcseconds,[1] it is located at a distance of around 209 light-years (64 parsecs) from Earth.

Both stars are F-type main sequence stars.[3] The first component has an apparent magnitude of 6.20; the second is magnitude 6.34.[3] They are orbiting each other with a period of 21.84 years with an eccentricity of 0.388.[5]

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 2.2 2.3 Nicolet, B. (October 1978), "Catalogue of homogeneous data in the UBV photoelectric photometric system", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode1978A&AS...34....1N. 
  3. 3.0 3.1 3.2 3.3 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode2008MNRAS.389..869E. 
  4. Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Washington: Carnegie Institution of Washington), Bibcode1953GCRV..C......0W. 
  5. 5.0 5.1 Hartkopf, W. I.; Mason, B. D.; McAlister, H. A. (1996), "Binary star orbits from speckle interferometry. VIII. Orbits of 37 close visual systems", Astronomical Journal 111: 370–392, doi:10.1086/117790, Bibcode1996AJ....111..370H. 
  6. Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002) 4027. Bibcode2004yCat.4027....0K. 
  7. "* 83 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+83+Aqr. 

External links