1241 Dysona
asteroid
1241 Dysona, provisional designation 1932 EB1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 77 kilometers in diameter. It was discovered on 4 March 1932, by English astronomer Harry Edwin Wood at the Union Observatory in Johannesburg, South Africa. The asteroid was named after English astronomer Frank Watson Dyson.
Orbit and classification
Dysona is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.9–3.5 AU once every 5 years and 8 months (2,081 days; semi-major axis of 3.19 AU). Its orbit has an eccentricity of 0.10 and an inclination of 24° with respect to the ecliptic.
The asteroid was first observed as A908 DC at Taunton Observatory (803) in February 1908. The body's observation arc begins with its observations as A920 EB at Heidelberg Observatory in March 1920, or 12 years prior to its official discovery observation at Johannesburg.
Physical characteristics
In the Tholen classification, Dysona's spectral type is ambiguous, closest to a primitive P-type and somewhat similar to a D- and C-type asteroid (PDC).
Rotation period and pole
In April 2006, a rotational lightcurve of Dysona was obtained by Julian Oey at Leura Observatory (E17) in Australia.
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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 Sep 5, 2026. The linked authority identifier is Q137259. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1241, 1932, 1908 and 1920.
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This entry incorporates text from “1241 Dysona” 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.