56 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 08.27657s[1] |
| Declination | −08° 34′ 27.1592″[1] |
| Apparent magnitude (V) | 5.79[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | K5 III[3] |
| U−B color index | +2.00[2] |
| B−V color index | +1.664±0.006[4] |
| Astrometry | |
| Radial velocity (Rv) | −49.5±2.9[5] km/s |
| Proper motion (μ) | RA: +6.321[1] mas/yr Dec.: −19.121[1] mas/yr |
| Parallax (π) | 5.5025±0.0807 mas[1] |
| Distance | 593 ± 9 ly (182 ± 3 pc) |
| Absolute magnitude (MV) | −0.66[4] |
| Details | |
| Mass | 1.23[6] M☉ |
| Radius | 43[7] R☉ |
| Luminosity | 896[1] L☉ |
| Surface gravity (log g) | 1.02[8] cgs |
| Temperature | 3,885[8] K |
| Metallicity [Fe/H] | −0.26[6] dex |
| Age | 13.4[8] Gyr |
| Other designations | |
| 56 Aql, BD−08°5150, FK5 2131, GC 2343, HD 188154, HIP 97928, HR 7584, SAO 143894[9] | |
| Database references | |
| SIMBAD | data |
56 Aquilae is a single[10] star in the equatorial constellation of Aquila. 56 Aquilae is its Flamsteed designation. Its apparent visual magnitude is 5.79,[2] meaning it is barely visible to the naked eye as a dim, orange-hued point of light, under ideal viewing conditions. The star is located at a distance of around 593 light years away from the Sun, based on parallax.[1] It is moving closer to the Earth with a heliocentric radial velocity of −50 km/s,[5] and is predicted to come as near as 222 light-years in around 3.3 million years.
This is an aging giant star with a stellar classification of K5 III,[3] having exhausted the supply of hydrogen at its core and expanded to 43 times the Sun's radius.[7] It is radiating 896 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 3,885 K.[8] 56 Aquilae is a double star,[11] but it does not appear to be a binary star system.[10] It is one of the double stars profiled in Admiral William Henry Smyth's 1864 work, Sidereal Chromatics.
References
- ^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
- ^ 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.
- ^ a b 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 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
- ^ a b Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
- ^ a b c d Kordopatis, G.; Schultheis, M.; McMillan, P. J.; Palicio, P. A.; De Laverny, P.; Recio-Blanco, A.; Creevey, O.; Álvarez, M. A.; Andrae, R.; Poggio, E.; Spitoni, E.; Contursi, G.; Zhao, H.; Oreshina-Slezak, I.; Ordenovic, C.; Bijaoui, A. (2023). "Stellar ages, masses, extinctions, and orbital parameters based on spectroscopic parameters of Gaia DR3". Astronomy and Astrophysics. 669: A104. arXiv:2206.07937. Bibcode:2023A&A...669A.104K. doi:10.1051/0004-6361/202244283.
- ^ "56 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-01.
- ^ 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, S2CID 14878976.
- ^ James, Andrew, The application of Admiral Smyth's "Sidereal Chromatics", archived from the original on 2009-10-26, retrieved 2007-12-22.