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51 Aquarii

Binary star system in the constellation Aquarius

Binary star system in the constellation Aquarius

| b-v=–0.04 | u-b=–0.11

51 Aquarii is a binary star system located around 410 light years away from the Sun in the equatorial constellation of Aquarius. 51 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, yellow-white hued star with a combined apparent visual magnitude of 5.78. The system is moving further from the Earth with a heliocentric radial velocity of +6 km/s.

The dual nature of this system was discovered by S. W. Burnham in 1873 with a 6 inch Alvan Clark refractor. The pair orbit each other with a period of 145 years and a large eccentricity of 0.7. The magnitude 6.45 primary, designated component A, is an A-type main sequence star with a stellar classification of A0 V. It has a high rate of rotation with a projected rotational velocity of 91 km/s. The secondary component has a matching class of A0 with a visual magnitude of 6.63. It has an effective temperature of 10,238 K.

References

References

  1. van Leeuwen, F.. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
  2. Wilson, R. E.. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute of Washington, D.C..
  3. (February 2007). "Rotational velocities of A-type stars. III. Velocity distributions". Astronomy and Astrophysics.
  4. (1978). "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System". Astronomy and Astrophysics Supplement Series.
  5. (April 1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal.
  6. "* 51 Aqr".
  7. (2015). "Speckle Interferometry at Soar in 2014". The Astronomical Journal.
  8. (September 2008). "A catalogue of multiplicity among bright stellar systems". [[Monthly Notices of the Royal Astronomical Society]].
  9. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics.
  10. (April 2007). "Orbits and System Masses of 14 Visual Double Stars with Early-Type Components". The Astronomical Journal.
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a-type-main-sequence-stars binary-stars aquarius-(constellation) durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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