56 Aquilae

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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

  1. 1 2 3 4 5 6 7 8 9 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 .
  2. 1 2 3 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.
  3. 1 2 Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  4. 1 2 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. 1 2 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.
  6. 1 2 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.
  7. 1 2 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 .
  8. 1 2 3 4 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.
  9. ↑ "56 Aql". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-08-01.
  10. 1 2 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.
  11. ↑ James, Andrew, The application of Admiral Smyth's "Sidereal Chromatics", archived from the original on 2009-10-26, retrieved 2007-12-22.
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