69 Hesperia
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69 Hesperia is a large, M-type main-belt asteroid. It was discovered by the Italian astronomer Giovanni Schiaparelli on April 29, 1861<ref name=MPC94743 /> from Milan, while he was searching for the recently discovered 63 Ausonia.<ref name=DeMeis2011/> It was his only asteroid discovery. Schiaparelli named it Hesperia in honour of Italy (the word is a Greek term for the peninsula).<ref name=Schmadel2003/> The asteroid is orbiting the Sun with a period of Template:Convert, a semimajor axis of Template:Val, and eccentricity of 0.165. The orbital plane is inclined by an angle of 8.59° to the plane of the ecliptic.
Hesperia was observed by Arecibo radar in February 2010.<ref name=Shepard2011/> Radar observations combined with lightcurve-based shape models, lead to a diameter estimate of Template:Convert. The radar albedo is consistent with a high-metal M-type asteroid.<ref name=Shepard2011/> In the near infrared, a weak absorption feature near a wavelength of 0.9 μm can be attributed to orthopyroxenes on the surface.<ref name=Hardersen2005/> A meteorite analogue of the reflectance spectra from 69 Hesperia is the Hoba ataxite.<ref name=Neeley2014/>
References
External links
- Bareket Observatory Template:Webarchive (Asteroid 69 Hesperia movie - through an Earth-based telescope.) Template:In lang
- Template:AstDys
- Template:JPL small body
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