Английская Википедия:(16960) 1998 QS52
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp (prov. designation: Шаблон:Mp) is a stony asteroid on a highly eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately Шаблон:Convert in diameter. It was discovered on 25 August 1998, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.[1] This asteroid is one of the largest potentially hazardous asteroid known to exist.[2]
Orbit and classification
Шаблон:Mp is a member of the dynamical Apollo group,[3][1] which are Earth-crossing asteroids. Apollo asteroids are the largest subgroup of near-Earth objects. It orbits the Sun at a distance of 0.31–4.1 AU once every 3 years and 3 months (1,194 days; semi-major axis of 2.20 AU). Its orbit has an exceptionally high eccentricity of 0.86 and an inclination of 18° with respect to the ecliptic.[3]
The body's observation arc begins with a precovery taken at the Siding Spring Observatory in June 1983, more than 15 years prior to its official discovery observation at Socorro.[1]
Close approaches
With an absolute magnitude of 14.3, Шаблон:Mp is one of the brightest and largest known potentially hazardous asteroid (see PHA-list).[2] It has an Earth minimum orbital intersection distance of Шаблон:Convert, which corresponds to 5.6 lunar distances.[3] Its eccentric orbit leads to close approaches with Mercury and Venus and carries it beyond the asteroid belt but not as far as to the orbit of Jupiter (>4.9 AU). It is therefore also a Venus- and Mars-crossing asteroid.[3]
Physical characteristics
In the SMASS classification, Шаблон:Mp is a Sq-subtype, that transitions between the stony S- and Q-type asteroids.[3] Observers at the NASA Infrared Telescope Facility have also characterized this body as an Sr-type, which transitions to the rare R-type asteroids.[4]
Rotation period
In 2008, two rotational lightcurves of Шаблон:Mp were obtained independently from photometric observations by Brian Warner at the Palmer Divide Observatory and by Brian Skiff during the Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) . Lightcurve analysis gave a rotation period of 5.789 and 5.8 hours with a brightness amplitude of 0.24 and 1.4 magnitude, respectively (Шаблон:Small).[5][6] An alternative period solution of 2.9 hours – or half of the above period – is also possible, though considered less likely by Warner.[7]Шаблон:Efn
Diameter and albedo
Шаблон:Mp has not been observed by any of the space-based surveys such as IRAS, Akari or the Wide-field Infrared Survey Explorer. The Collaborative Asteroid Lightcurve Link assumes a stony standard albedo of 0.20 for its surface, and calculates a diameter of 4.10 kilometers based on an absolute magnitude of 14.3.[5]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 13 September 2000.[8] As of 2018, it has not been named.[1]
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
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