56 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 08.27579s[1] |
| Declination | –08° 34′ 27.1575″[1] |
| Apparent magnitude (V) | 5.79[2] |
| Characteristics | |
| Spectral type | K5 III[3] |
| U−B color index | +2.00[2] |
| B−V color index | +1.64[2] |
| Astrometry | |
| Radial velocity (Rv) | –49.5[4] km/s |
| Proper motion (μ) | RA: +5.36[1] mas/yr Dec.: –18.81[1] mas/yr |
| Parallax (π) | 8.27 ± 1.06 mas[1] |
| Distance | approx. 390 ly (approx. 120 pc) |
| Other designations | |
56 Aquilae (abbreviated 56 Aqr) is a star in the equatorial constellation of Aquila. 56 Aquilae is its Flamsteed designation. Its apparent magnitude is 5.76, meaning it would be barely visible to the naked eye, under ideal conditions. It was discovered by nineteenth Century Astronomer John Herschel.
56 Aquilae is a double star,[6] but it does not appear to be a binary star system.[3] It is one of the double stars profiled in Admiral William Henry Smyth's 1864 work, Sidereal Chromatics.
References
- ^ a b c d e 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.
- ^ a b c Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode:1978A&AS...34....1N.
- ^ a b 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.
- ^ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- ^ "56 Aql -- Star in double system", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-27.
- ^ Andrew James. "The application of Admiral Smyth's "Sidereal Chromatics"". Retrieved 2007-12-22.
External links
 | This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |