Английская Википедия:2608 Seneca
Шаблон:Use dmy dates Шаблон:Infobox planet
2608 Seneca, provisional designation Шаблон:Mp, is a stony asteroid and sub-kilometer near-Earth object of the Amor group, approximately 0.9 kilometers in diameter. It was discovered on 17 February 1978, by German astronomer Hans-Emil Schuster at ESO's La Silla Observatory in northern Chile, and named after Roman philosopher Seneca.[1][2]
Orbit
Seneca orbits the Sun at a distance of 1.1–4.0 AU once every 3 years and 12 months (1,457 days). Its orbit has an eccentricity of 0.57 and an inclination of 15° with respect to the ecliptic.[3]
The body's observation arc begins with its official discovery observation in 1978, as no precoveries were taken, and no prior identifications were made.[2]
Close approaches
Seneca has an Earth minimum orbital intersection distance of Шаблон:Convert, which corresponds to 51.5 lunar distances.[3] On 22 March 2062, it will pass Шаблон:Convert from the Earth.[4]
Physical characteristics
In the Tholen taxonomy, Seneca is a stony S-type asteroid.[3]
Photometry
In March 1978, a photometric observations taken by Degewij and Lebofsky at the Lunar and Planetary Laboratory, Arizona, using a 154-cm reflector, gave a rotational lightcurve with a rotation period of 8 hours and a brightness amplitude of 0.4 (0.5) magnitude (Шаблон:Small).[5]
Radiometry
In addition, radiometric observations by L. and M. Lebofsky with the 71-cm reflector gave a mean-diameter of Шаблон:Val kilometers and albedo of Шаблон:Val.[5]
Diameter and albedo
The Minor Planet Center classifies Seneca as an object larger than 1 kilometer ("1+ KM Near-Earth Object"),[2] while Collaborative Asteroid Lightcurve Link derives an albedo of 0.20 and a diameter of 0.9 kilometers based on an absolute magnitude of 17.59.[6] In 1994, astronomer Tom Gehrels published a diameter of 0.9 kilometers with an albedo of 0.21 in his Hazards Due to Comets and Asteroids.[3]
Naming
This minor planet was named after Roman philosopher and statesman Lucius Annaeus Seneca (c. 4 BC – AD 65), also known as "Seneca the Younger" or simply "Seneca".[1] The approved naming citation was published by the Minor Planet Center on 8 April 1982 (Шаблон:Small).[7] The lunar crater Seneca was also named in his honor.[1]
References
External links
- Hazards Due to Comets and Asteroids, Tom Gehrels (1994/5)
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Шаблон:NeoDys
- Шаблон:ESA-SSA
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Amor asteroids
- Discoveries by Hans-Emil Schuster
- Named minor planets
- S-type asteroids (Tholen)
- Astronomical objects discovered in 1978
- Seneca the Younger
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