Английская Википедия:69 Hesperia

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Hesperia (minor planet designation: 69 Hesperia) is a large, M-type main-belt asteroid. It was discovered by the Italian astronomer Giovanni Schiaparelli on April 29, 1861[1] from Milan, while he was searching for the recently discovered 63 Ausonia.[2] It was his only asteroid discovery. Schiaparelli named it Hesperia in honour of Italy (the word is a Greek term for the peninsula).[3] The asteroid is orbiting the Sun with a period of Шаблон:Convert, a semimajor axis of Шаблон: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.[4] Radar observations combined with lightcurve-based shape models, lead to a diameter estimate of Шаблон:Convert. The radar albedo is consistent with a high-metal M-type asteroid.[4] In the near infrared, a weak absorption feature near a wavelength of 0.9 μm can be attributed to orthopyroxenes on the surface.[5] A meteorite analogue of the reflectance spectra from 69 Hesperia is the Hoba ataxite.[6]

References

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External links

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Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control

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