15224 Penttilä
asteroid
15224 Penttilä (provisional designation 1985 JG) is a dark background asteroid from the inner regions of the asteroid belt, approximately 8 kilometers (5 miles) in diameter. It was discovered on 15 May 1985, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Arizona, United States. The likely elongated asteroid has a rotation period of 4.4 hours. It was named after planetary scientist Antti Penttilä at the University of Helsinki.
Orbit and classification
Penttilä is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.8–3.0 AU once every 3 years and 9 months (1,372 days; semi-major axis of 2.42 AU). Its orbit has an eccentricity of 0.24 and an inclination of 12° with respect to the ecliptic.
The body's observation arc begins with its first observation, a precovery taken at the Crimean Astrophysical Observatory in April 1970, or 15 years prior to its official discovery observation at Anderson Mesa Station.
Naming
This minor planet was named for Finnish postdoctoral researcher Antti Penttilä (born 1977) at the University of Helsinki, an expert on light reflection and absorption on the surface of small Solar System bodies such as asteroids and cometary nuclei, as well as of the cosmic dust released by cometary comae. The official naming citation was published on 12 July 2014 (M.P.C. 89081).
Begin with the source’s own compact description: “15224 Penttilä” is asteroid. The dossier treats that line as a proposition to test through Penttilä and asteroid, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 6, 2026. The linked authority identifier is Q17391539. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1985, 1970, 1977 and 2014.
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This entry incorporates text from “15224 Penttilä” 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.