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52 Cygni

Binary star system in the constellation Cygnus

52 Cygni

Binary star system in the constellation Cygnus

| b-v=+1.05 | u-b=+0.88

52 Cygni with NGC 6960, part of the [[Veil Nebula

52 Cygni is a giant star in the northern constellation of Cygnus with an apparent magnitude of 4.22. Based on its Hipparcos parallax, it is about 291 ly away.

52 Cygni is a probable horizontal branch (red clump) star, fusing helium in its core, although there is a 25% chance that it is still on the red giant branch (RGB) and fusing hydrogen in a shell around an insert core. As a clump giant it would be 2.27 billion years old, but only 910 million years if 52 Cygni is an RGB star. It shines with a bolometric luminosity of about at an effective temperature of 4,677 K. It has a radius of .

At an angular separation of 6.0″ from 52 Cygni is a faint magnitude 9.5 companion.

It was once designated k Cygni by John Flamsteed and was included in his Atlas Coelestis, but the designation is now dropped.{{citation

References

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References

  1. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
  2. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society.
  3. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics.
  4. (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics.
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g-type-giants horizontal-branch-stars binary-stars cygnus-(constellation) durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
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