83 Aquarii

83 Aquarii
Diagram showing star positions and boundaries of the Aquarius constellation and its surroundings


Location of 83 Aquarii (circled)

Observation data
Epoch J2000      Equinox J2000
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, HD 218060, HIP 113996, HR 8782, SAO 146498.[6]
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

83 Aquarii (abbreviated 83 Aqr) is a binary star system in the equatorial constellation of Aquarius. 83 Aquarii is its Flamsteed designation though it also bears the Bayer designation of h Aquarii. 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 2 3 4 5 6 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 Nicolet, B. (October 1978), "Catalogue of homogeneous data in the UBV photoelectric photometric system", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
  3. 1 2 3 4 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, arXiv:0806.2878Freely accessible, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  4. ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  5. 1 2 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, Bibcode:1996AJ....111..370H, doi:10.1086/117790.
  6. ↑ "83 Aqr -- Star", SIMBAD Astronomical Database, retrieved 2007-07-14

External links

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