Английская Википедия:2440 Educatio
Шаблон:Use dmy dates Шаблон:Infobox planet
2440 Educatio Шаблон:IPAc-en is a Florian asteroid from the inner regions of the asteroid belt, approximately Шаблон:Convert in diameter. The possibly elongated S-type asteroid has an exceptionally long rotation period of 1561 hours and is one of the slowest rotators known to exist.[1] It was discovered on 7 November 1978, by American astronomers Eleanor Helin and Schelte Bus at the Palomar Observatory in California,[2] and later named "Educatio", the Latin word for Education.[3]
Orbit and classification
Educatio member of the Flora family (Шаблон:Small),[4] a giant asteroid family and the largest family of stony asteroids in the main-belt.[5] It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,205 days; semi-major axis of 2.22 AU). Its orbit has an eccentricity of 0.16 and an inclination of 4° with respect to the ecliptic.[6]
The asteroid was first observed as Шаблон:Mp at the Simeiz Observatory in August 1928. The body's observation arc begins with its observation as Шаблон:Mp at the Goethe Link Observatory in May 1954, more than 24 years prior to its official discovery observation at Palomar.[2]
Naming
This minor planet was named "Educatio", the Latin word for Education, one of the most important human endeavors, which is foremost to the industrialization of space.[2] The official naming citation was published by the Minor Planet Center on 28 January 1983 (Шаблон:Small).[7]
Physical characteristics
In the SMASS classification, Educatio is a stony S-type asteroid,[1] which agrees with the overall spectral type for members of the Flora family.[5]Шаблон:Rp
Rotation period
A rotational lightcurve of Educatio, obtained from photometric observations, gave a rotation period of 1561 hours with a high brightness amplitude of 0.80 magnitude (Шаблон:Small), indicative of a non-spherical shape.[1] It belongs to the small group of slow rotators with a period above 1000 hours.
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Educatio measures 6.59 kilometers in diameter and its surface has an albedo of 0.247,[8] while the Collaborative Asteroid Lightcurve Link an albedo of 0.24 – derived from 8 Flora, the parent body of the Flora family – and calculates a diameter of 6.51 kilometers based on an absolute magnitude of 13.1.[1]
References
External links
- Lightcurve plot (2440) Educatio, Sugerloaf Mt. / Pravec
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Flora asteroids
- Discoveries by Eleanor F. Helin
- Discoveries by Schelte J. Bus
- Named minor planets
- Slow rotating minor planets
- Astronomical objects discovered in 1978
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