Английская Википедия:4183 Cuno
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Infobox planet
4183 Cuno, provisional designation Шаблон:Mp, is an eccentric, rare-type asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, and measures approximately 4 kilometers in diameter.
It was discovered on 5 June 1959, by German astronomer Cuno Hoffmeister at Boyden Observatory in Bloemfontein, South Africa, and later named in the discoverer's honor.[1][2]
Classification and orbit
Cuno orbits the Sun at a distance of 0.7–3.2 AU once every 2 years and 9 months (1,019 days). Its orbit has an eccentricity of 0.63 and an inclination of 7° with respect to the ecliptic.[3] The body's observation arc begins with its identification as Шаблон:Mp, the first used observation made at Palomar Observatory in 1986, approximately 27 years after its official discovery observation at Boyden.[2]
The asteroid has an Earth minimum orbital intersection distance of Шаблон:Convert, which translates into 11 lunar distances.[3] Cuno approaches the Earth to within 40 million kilometers six times in the 21st century. On 20 May 2012, it made its closest Earth approach at a distance of Шаблон:Convert.[4] It will not make a closer approach until 2093 when it will pass Earth at Шаблон:Convert.[4]
Due to its eccentric orbit, it is also a Mars and Venus-crosser.[3]
Physical characteristics
Spectral type and composition
Cuno is a stony S-type asteroid.[5] As it has a reflective surface, composed of a mixture different silicates, nickel and iron, Cuno has been characterized as a rare Q-type asteroid by the 1-meter Jacobus Kapteyn Telescope on La Palma, Pan-STARRSШаблон:' large-scale magnitude survey, and NASA IRTF telescope.[6][7][8] On the SMASS taxonomic scheme, Cuno is a Sq-subtype, a transitional group between the S and Q types.[3]
Rotation and shape
Several rotational lightcurves were obtained by Czech astronomer Petr Pravec and American astronomer Brian Warner between 1998 and 2014. Lightcurve analysis gave a rotation period of 3.56 hours with a high brightness amplitude between 0.47 and 0.83 in magnitude, indicating that the body has a non-spheroidal shape.[9]Шаблон:EfnШаблон:Efn
In December 2000, Cuno was analysed by radar to determine its shape. The resultant images are lacking in detail, but indicate a rough sphere with some kind of concave depression 1–2 km in diameter.Шаблон:Citation needed
Diameter and albedo
Following the space-based surveys carried out by NASA's Spitzer Space Telescope and the NEOWISE mission of the Wide-field Infrared Survey Explorer, Cuno has an albedo between 0.097 and 0.36, and a diameter between 2.945 and 5.618 kilometers.[10][11][12][13][14]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for the stony asteroid of 0.20 and calculates a diameter of 3.9 kilometer with an absolute magnitude of 14.4, as the higher the body's albedo (reflectivity), the lower its diameter at a constant absolute magnitude (brightness).[15]
Naming
This minor planet was named after its discoverer, Cuno Hoffmeister, according to the established practice to name near-Earth asteroids with a four-letter masculine name.[1] The central main-belt asteroid 1726 Hoffmeister, namesake of the Hofmeister family, is also named after the discoverer. The official naming citation was published on 28 May 1991 (Шаблон:Small).[16]
Notes
References
External links
- 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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