517 Edith
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517 Edith, provisional designation Template:Mp, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 83 kilometers in diameter. It was discovered on 22 September 1903, by American astronomer Raymond Dugan at the Heidelberg-Königstuhl State Observatory in southwest Germany, who named it after his sister Edith Eveleth.[1]
Orbit and classification
Edith orbits the Sun in the outer main-belt at a distance of 2.6–3.7 AU once every 5 years and 7 months (2,050 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic.[2]
The body's observation arc begins at Heidelberg, five days after its official discovery observation (first recorded observation at the MPC).[1]
Physical characteristics
In the Tholen taxonomy, Edith is an X-type asteroid.[2] Due to its very low albedo, a more specific P-type is derived by the LCDB,[3] while a spectroscopic survey of Tholen X-type asteroids characterizes Edith as a C-type asteroid.[4]
Rotation period
In October 2009, the best-rated rotational lightcurve of Edith was obtained from photometric observations by French amateur astronomer Maurice Audejean at his Chinon Observatory (B92Script error: No such module "Check for unknown parameters".) in Chinon, France. Lightcurve analysis gave a well-defined rotation period of 9.2747 hours with a brightness variation of 0.16 magnitude (U=3Script error: No such module "Check for unknown parameters".), indicating that the body is rather spheroidal.[5]
Additional measurements of the asteroid's period were made by French amateur astronomers René Roy and Laurent Bernasconi, as well as by American astronomer Robert Koff at his Antelope Hills Observatory in Bennett, Colorado (H09Script error: No such module "Check for unknown parameters".) and by Alan W. Harris of the Earth and Planetary Physics Group at JPL in the 1980s (U=2/2/2/2Script error: No such module "Check for unknown parameters".).[6][5][7]Template:Efn
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Edith measures between 79.72 and 111.89 kilometers in diameter and its surface has a low albedo between 0.026 and 0.05.[8][9][10][11][12]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0397 and a diameter of 83.24 kilometers based on an absolute magnitude of 9.52.[3]
Naming
This minor planet was named by the discoverer after his sister Edith Eveleth (née Dugan). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 55Script error: No such module "Check for unknown parameters".). Edith Eveleth also proposed and prepared the naming citation for Raymond Dugan's first discovery, Template:MoMP.[13]
Notes
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Template:AstDys
- Template:JPL small body
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