36 Aquilae
Star in the constellation Aquila
title: "36 Aquilae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["bayer-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "aquila-(constellation)", "hipparcos-objects", "k-type-giants", "bright-star-catalogue-objects", "durchmusterung-objects", "suspected-variables"] description: "Star in the constellation Aquila" topic_path: "general/bayer-objects" source: "https://en.wikipedia.org/wiki/36_Aquilae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Star in the constellation Aquila ::
| image= |image=Aquila constellation map.svg|alt=|float=center|width=260 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=36 Aql |x=578|y=662 |caption=Location of 36 Aquilae (circled) | epoch = J2000 | constell = Aquila | ra = | dec = | appmag_v = 5.02 | type = AGB | class = K5 III | r-i = | v-r = | b-v = +1.75 | u-b = +2.03 | variable = | radial_v = | prop_mo_ra = +20.64 | prop_mo_dec = −10.63 | parallax = 6.17 | p_error = 0.30 | parallax_footnote = | absmag_v = −1.01 | mass = 1.1 | radius = 75 | luminosity = 927 | temperature = 3,576 | metal_fe = 0.09 | rotational_velocity = | age_myr = | names = BD−03°4612, FK5 1509, HD 183630, HIP 95937, HR 7414, SAO 143482 |Simbad=36+Aql
36 Aquilae (abbreviated 36 Aql) is a star in the equatorial constellation of Aquila. 36 Aquilae is its Flamsteed designation though it also bears the Bayer designation e Aquilae. With an apparent visual magnitude of 5.02, this star is faintly visible to the naked eye. It has an annual parallax shift of 6.17 mas, indicating a physical distance of 530 ly with a 30 light-year margin of error.
The spectrum of this star matches a stellar classification of K5 III. It is a red giant star with 54 75 times the radius of the Sun that is currently on the asymptotic giant branch. This means the star is generating energy by the fusion of hydrogen along an outer shell and helium along a concentric inner shell, surrounding an inert core of carbon and oxygen. 36 Aquilae undergoes small, periodic variations in luminosity, changing by 0.0063 magnitudes about 11.5 times per day, or once every 2 hours and 5.2 minutes.
References
References
- {{cite Gaia DR2. 4213654429705675520
- (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics.
- (1992). "Asymptotic Giant Branch Stars Near the Sun". The Astronomical Journal.
- (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey.
- (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
- van Leeuwen, F.. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics.
- (May 2009). "Spectroscopic binaries among Hipparcos M giants. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics.
- (1964). "Photometric Data for Stars in the Equatorial Zone (Seventh List)". Monthly Notes of the Astronomical Society of Southern Africa.
- (March 2002). "New periodic variables from the Hipparcos epoch photometry". [[Monthly Notices of the Royal Astronomical Society]].
- "* e Aql".
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