Psi3 Aquarii
(Redirected from HR 8865)
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 18m 57.67658s[1] |
| Declination | –09° 36′ 38.7054″[1] |
| Apparent magnitude (V) | 4.98[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| U−B color index | –0.02 |
| B−V color index | –0.02[2] |
| Astrometry | |
| Radial velocity (Rv) | –10[4] km/s |
| Proper motion (μ) | RA: +43.33[1] mas/yr Dec.: –8.30[1] mas/yr |
| Parallax (π) | 12.47 ± 0.43 mas[1] |
| Distance | 262 ± 9 ly (80 ± 3 pc) |
| Absolute magnitude (MV) | +0.47[5] |
| Details | |
| Radius | 2[6] R☉ |
| Luminosity | 70[5] L☉ |
| Rotational velocity (v sin i) | 144[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Psi3 Aquarii, Latinized from ψ3 Aquarii, is the Bayer designation for a visual binary star[9] system in the constellation of Aquarius. It has an apparent visual magnitude of 4.98,[2] which is bright enough to be seen with the naked eye. Parallax measurements give a distance estimate of roughly 262 light-years (80 parsecs).[1]
The main component of this system is an A-type main sequence star with a stellar classification of A0 V.[3] Its companion is an 11th magnitude star 1.5 arcseconds from the primary.[10] This system is an X-ray source with a luminosity of 8.34 × 1029 erg s−1. This radiation most likely comes from the companion star.[9]
References
[edit]- ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- ^ a b 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.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
- ^ "* psi03 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-05.
- ^ a b Schröder, C.; Schmitt, J. H. M. M. (November 2007), "X-ray emission from A-type stars", Astronomy and Astrophysics, 475 (2): 677–684, Bibcode:2007A&A...475..677S, doi:10.1051/0004-6361:20077429.
- ^ 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.
