Английская Википедия:1391 Carelia
Шаблон:Use dmy dates Шаблон:Infobox planet
1391 Carelia (prov. designation: Шаблон:Mp) is a stony background asteroid from the central region of the asteroid belt. It was discovered on 16 February 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland.[1] The S-type asteroid has a rotation period of 5.9 hours and measures approximately Шаблон:Convert in diameter. It was named for the Northeast European region of Karelia.[2]
Orbit and classification
Carelia is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[3][4] It orbits the Sun in the central main-belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,485 days; semi-major axis of 2.55 AU). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic.[5] It was first observed at Heidelberg Observatory, extending the body's observation arc by 2 days prior to its official discovery observation at Turku.[1]
Naming
This minor planet was named after the northeastern European region of Karelia, located between the Gulf of Finland and the Russian White Sea. The Шаблон:MoMP was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small).[2] Since the Winter War between the Soviet Union and Finland in 1939–40, most of the regions belongs now to Russia. A large part of Yrjö Väisälä's discoveries have names that are in some form or another related to that war about Karelia.
Physical characteristics
In the Tholen taxonomy, Carelia is a stony S-type asteroid, the most common type in the inner main-belt.[5] The asteroid is also an S-type in the SDSS-based taxonomy.[6]
Rotation and pole
In 2016, a rotational lightcurve of Carelia was published using modeled photometric data from the Lowell Photometric Database (LPD). Lightcurve analysis gave a rotation period of Шаблон:Val hours (Шаблон:Small), as well as two spin axes at (21.0°, −79.0°) and (208.0°, −43.0°) in ecliptic coordinates (λ, β).[7]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Carelia measures 11.079 and 11.570 kilometers in diameter and its surface has an albedo of 0.1972 and 0.214, respectively.[8][4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.46 kilometers based on an absolute magnitude of 12.07.[9]
References
External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
- 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
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- Английская Википедия
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- Discoveries by Yrjö Väisälä
- Named minor planets
- S-type asteroids (Tholen)
- Astronomical objects discovered in 1936
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