36 Aquilae

This article is about e Aquilae. Not to be confused with ε Aquilae.
36 Aquilae
Diagram showing star positions and boundaries of the Aquila constellation and its surroundings
Location of 36 Aquarii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 30m 39.83606s[1]
Declination –02° 47′ 19.9944″[1]
Apparent magnitude (V) 5.02[2]
Characteristics
Spectral type M1 III[3]
U−B color index +2.03[2]
B−V color index +1.75[2]
Astrometry
Radial velocity (Rv)–10.38 ± 0.55[4] km/s
Proper motion (μ) RA: +20.64[1] mas/yr
Dec.: –10.63[1] mas/yr
Parallax (π)6.17 ± 0.30 mas[1]
Distance530 ± 30 ly
(162 ± 8 pc)
Details
Radius54[5] R☉
Other designations
BD–03° 4612, FK5 1509, HD 183630, HIP 95937, HR 7414, SAO 143482.[3]
Database references
SIMBADdata

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,[2] 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 light-years (160 parsecs) with a 30 light-year margin of error.[1]

The spectrum of this star matches a stellar classification of M1 III.[3] It is a red giant star with 54[5] times the radius of the Sun that is currently on the asymptotic giant branch.[6] 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.[7]

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  5. ^ a b Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
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