Английская Википедия:(481394) 2006 SF6
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp is a sub-kilometer near-Earth object and potentially hazardous asteroid of the Aten group, approximately Шаблон:Convert in diameter. It was discovered on 17 September 2006, by the Catalina Sky Survey at Catalina Station in Arizona.[1] On 21 November 2019, it passed Earth at a distance of Шаблон:Convert, which is the object's closest flyby for centuries.[2] The stony A/S-type asteroid is highly elongated in shape and has a rotation period of 11.5 hours.
Orbit and classification
Шаблон:Mp orbits the Sun at a distance of 0.7–1.2 AU once every 11 months (338 days; semi-major axis of 0.95 AU). Its orbit has an eccentricity of 0.28 and an inclination of 6° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation at Catalina Station in September 2006.[1]
Close approaches
Being a potentially hazardous asteroid, Шаблон:Mp has an Earth minimum orbital intersection distance (MOID) of Шаблон:Convert which corresponds to 7.4 lunar distances.[2] In order to be classified as "potentially hazardous" an object must have an Earth-MOID of less than Шаблон:Convert – approximately 19.5 lunar distances – and an absolute magnitude brighter than 22, approximately corresponding to a diameter above Шаблон:Convert.
On 21 November 2019 at 00:01 UTC, it passed Earth at a nominal distance (measured from the center of the Earth) of Шаблон:Convert and at a relative velocity of Шаблон:Val.[2] This is the object's closest flyby in JPL's data base, which covers 183 approaches over almost three centuries from April 1900 to November 2198.[2][3]
On 19 November 2069, it will pass Шаблон:Convert from Earth, which will be the asteroid's second closest approach after its record flyby on 21 November 2019.[2]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 12 January 2017 (Шаблон:Small).[4] As of 2020 it has not been named.[1]
Physical characteristics
During its apparition in November 2007, spectro-photometric data obtained of Шаблон:Mp allowed for an A/S/D-type classification. This classification could be further constrained to an A/S-type, as a D-type does not agree with the object's relatively high albedo value (see below).[5]Шаблон:Rp
Rotation period
In September 2018, a rotational lightcurve of Шаблон:Mp was obtained from photometric observations by Brian Warner and Robert Stephens at the Center for Solar System Studies in California. Lightcurve analysis gave a rotation period of Шаблон:Val hours with a very high brightness amplitude of Шаблон:Val magnitude (Шаблон:Small), indicative of a highly elongated non-spherical shape.[6] The two photometrists revisited the object in October 2019 and obtained a similar result of Шаблон:Val hours with an even higher magnitude of Шаблон:Val (Шаблон:Small).[7]
Diameter and albedo
According to the NEOSurvey carried out by NASA's Spitzer Space Telescope, the asteroid's surface has an albedo of Шаблон:Val,[5] which gives a mean-diameter of roughly 300 meters based on an absolute magnitude of 19.9.[8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and a diameter of 0.311 kilometers using an absolute magnitude of 19.9 as well.[9]
References
External links
- An asteroid as large as 2,000 feet across will speed past Earth later this month, bgr.com, 6 November 2019
- NEO Earth Close Approaches, CNEOS – Center for Near Earth Object Studies
- Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2018 July-September, Brian D. Warner, Robert D. Stephens, The Minor Planet Bulletin, January 2019
- Шаблон:NeoDys
- Шаблон:ESA-SSA
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies
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