37 Aquilae
star in the constellation Aquila
37 Aquilae, abbreviated 37 Aql, is a star in the equatorial constellation of Aquila. 37 Aquilae is its Flamsteed designation. It has an apparent visual magnitude of approximately 5.12, which is bright enough to be visible to the naked eye. The distance to 37 Aql can be estimated from its annual parallax shift of 7.2 mas, yielding a range of 456 light years. The star is moving closer to the Earth with a heliocentric radial velocity of −30 km/s, and is predicted to come to within 72 light-years in around 4.4 million years.
This is an aging giant star with a stellar classification of G8 IIIa. It is uncertain whether this star is on the red giant branch or the horizontal branch; Reffert et al. (2015) give 57% odd that it is the latter. In that case, their model shows an estimated age of 1.2 billion years with 2.3 times the mass of the Sun and 23 times the Sun's radius. It is radiating 219 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,594 K. These coordinates are a source of X-ray emission, which is most likely coming from the star.
“37 Aquilae” enters the record as star in the constellation Aquila. Crown Archives preserves that source wording while asking what Aquilae, star and constellation can confirm, complicate or overturn.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jan 22, 2026. The linked authority identifier is Q2400372. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2015.
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This entry incorporates text from “37 Aquilae” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.