56 Aquilae
{{Short description|K-type giant star in the constellation Aquila}}
{{Starbox begin}}
{{Starbox observe
| epoch = J2000
| constell = Aquila
| dec = {{DEC|-08|34|27.1674}}
}}
{{Starbox character
| type =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|−49.5|2.9}}
| parallax = 5.6650
| p_error = 0.1739
}}
{{Starbox detail
| mass =
| radius = {{Val|41.7|2.0|2.6}}
| temperature = {{Val|3972|130|91|fmt=commas}}
| metal_fe =
| gravity =
| rotational_velocity =
| age_gyr =
}}
{{Starbox catalog
| names = {{odlist | F=56 Aql | BD=−08°5150 | FK5=2131 | GC=2343 | HD=188154 | HIP=97928 | HR=7584 | SAO=143894 | RAFGL=5441S }}
}}
{{Starbox reference
| Simbad = 56+Aql
}}
{{Starbox end}}
56 Aquilae is a single star in the equatorial constellation of Aquila. 56 Aquilae is its Flamsteed designation. Its apparent visual magnitude is 5.79, 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 580 light years away from the Sun, based on parallax. It is moving closer to the Earth with a heliocentric radial velocity of −50 km/s, and is predicted to come as near as {{Convert|68.02|pc|ly|0|disp=out|abbr=off}} in around 3.3 million years.
This is an aging giant star with a stellar classification of K5 III, having exhausted the supply of hydrogen at its core and expanded to 42 times the Sun's radius. It is radiating 391 times the luminosity of the Sun from its photosphere at an effective temperature of 3,972 K. 56 Aquilae is a double star, but it does not appear to be a binary star system. It is one of the double stars profiled in Admiral William Henry Smyth's 1864 work, Sidereal Chromatics.
References
{{reflist|refs=
{{cite simbad | title=56 Aql | access-date=2019-08-01 }}
{{Cite Gaia DR2|4195316706052413568}}
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters | arxiv=1108.4971
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644
}}
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879 | date=September 2008
| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=.
| bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}
| title=Michigan catalogue of two-dimensional spectral types for the HD Stars
| volume=5 | year=1999 | postscript=.
| journal=Michigan Spectral Survey
| last1=Houk | first1=N. | last2=Swift | first2=C.
| bibcode=1999MSS...C05....0H }}
| url=http://homepage.mac.com/andjames/Page029j0.htm
| title=The application of Admiral Smyth's "Sidereal Chromatics"
| first1=Andrew | last1=James | access-date =2007-12-22
| archive-url=https://web.archive.org/web/20091026135225/http://homepage.mac.com/andjames/Page029j0.htm
| url-status=dead | archive-date=2009-10-26 | postscript=. }}
| last=Wilson | first=Ralph Elmer | year=1953
| title=General Catalogue of Stellar Radial Velocities
| journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington
| location=Washington | bibcode=1953GCRV..C......0W }}
| last1=Nicolet | first1=B. | year=1978
| title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System
| journal=Astronomy and Astrophysics Supplement Series
| volume=34 | pages=1–49 | bibcode=1978A&AS...34....1N }}
}}
External links
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207584 ]
- [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J19541-0834A CCDM 19541-0834]
- [https://archive.today/20130213143111/http://aladin.u-strasbg.fr/alapre.pl?-c=19+54+08.2772-08+34+27.160&button=RGB Image 56 Aquilae]
{{Stars of Aquila}}
{{DEFAULTSORT:56 Aquilae}}
Category:Aquila (constellation)