5 Aquarii is a single[1] star in the zodiac constellation of Aquarius,[2] located about 780 light years away from the Sun,[3] based on parallax. 5 Aquarii is the Flamsteed designation. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.55.[4] This object is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.[5]

This is a suspected chemically peculiar star[6][7] star with a stellar classification of B9 III,[8] although Adelman et al. (2004) consider it to be a normal star with near-solar elemental abundances.[9] It is relatively sharp-lined[9] with a projected rotational velocity of 25 km/s.[10] The star is radiating 318 times the luminosity of the Sun from its photosphere at an effective temperature of 11,200 K.[7]

References

  1. ^ 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:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976
  2. ^ "5 Aqr". Retrieved 2018-05-09.
  3. ^
  4. ^ Anderson, E. & Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters. 38 (5): 331, arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644
  5. ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters. 32 (11): 759–771, arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169
  6. ^ Renson, P. & Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics. 498 (3): 961–966, Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788
  7. ^ Adelman, S. J. (April 1986), "Optical region elemental abundance analyses of B and A stars. V. The normal stars theta Leonis, tau Herculis, 14 Cygni and 5 Aquarii", Astronomy and Astrophysics Supplement Series. 64: 173−187, Bibcode:1986A&AS...64..173A
  8. ^ Houk, N. (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Vol. 2, Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H
  9. ^ Adelman, Saul J. et al. (December 2004), "Elemental abundance studies using the EBASIM spectrograph of the 2.1-m CASLEO Observatory telescope. I. The normal stars 5 Aqr and 30 Peg", "The A-Star Puzzle, held in Poprad, Slovakia, July 8-13, 2004.", Vol. 224, no. 224, IAU Symposium, Cambridge, UK: Cambridge University Press, pp. 530–532, Bibcode:2004IAUS..224..530A. doi:10.1017/S1743921305009282
  10. ^ Abt, Helmut A. et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal. 573 (1): 359–365, Bibcode:2002ApJ...573..359A. doi:10.1086/340590