Английская Википедия:(342842) 2008 YB3
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp, provisional designation: Шаблон:Mp, is a sizable centaur and retrograde damocloid from the outer Solar System, approximately Шаблон:Convert in diameter. It was discovered on 18 December 2008, by astronomers with the Siding Spring Survey at the Siding Spring Observatory in Australia.[1][2] The minor planet was numbered in 2012 and has since not been named.
Orbit and classification
Шаблон:Mp orbits the Sun at a distance of 6.5–16.7 AU once every 39 years and 5 months (14,399 days; semi-major axis of 11.58 AU). Its orbit has an eccentricity of 0.44 and an inclination of 105° with respect to the ecliptic.[3] The body's observation arc begins with its official discovery observation at Siding Spring in December 2008.[1]
Retrograde centaur and damocloid
Шаблон:Mp is a member of the centaurs, a population of inward-moving bodies transiting from the Kuiper belt to the group of Jupiter-family comets. Orbiting mainly between Jupiter and Neptune, they typically have a semi-major axis of 5.5 to 30.1 AU. Centaurs are cometary-like bodies with an eccentric orbit. Their short dynamical lifetime is due to the perturbing forces exerted on them by the outer planets of the Solar System.[4]
The object is on a retrograde orbit as it has an inclination of more than 90°.[3][5] There are only about a hundred known retrograde minor planets out of nearly 800,000 observed bodies, and, together with Шаблон:Mpl- and [[2011 MM4|Шаблон:Mp]], it is among the largest such objects.[5] The object also meets the orbital definition for being a damocloid. This is a small group of cometary-like objects without a coma or tail and a Tisserand's parameter with respect to Jupiter of less than 2 besides a retrograde orbit.
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 29 October 2012, receiving the number Шаблон:LoMP in the minor planet catalog (Шаблон:Small).[6] Шаблон:As of, it has not been named.[1] According to the established naming conventions, it will be named after one of the many centaurs from Greek mythology, which are creatures with the upper body of a human and the lower body and legs of a horse.[7]
Physical characteristics
Шаблон:Mp has an intermediate BR color, in between the BB ("grey-blue") and RR ("very red") color classes.[2] Sheppard's obtained color indices: B–I (1.750), B–R (1.260), R–I (0.490) and V–R (0.460) agree with most other centaurs.[8][4]Шаблон:Rp The resulting B–V index is 0.8 (subtracting V–R from B–R).
Diameter and albedo
According to the survey of centaurs and scattered-disc objects carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Шаблон:Mp measures Шаблон:Convert in diameter and its surface has an albedo of 0.062,[9] which makes it too small to be considered as a dwarf-planet candidate.
Rotation period
Шаблон:As of, no rotational lightcurve of has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[3][10]
See also
References
External links
- List Of Centaurs and Scattered-Disk Objects, 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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