Английская Википедия:(89959) 2002 NT7
Шаблон:Use mdy dates Шаблон:Infobox planet
Шаблон:Mp (prov. designation: Шаблон:Mp) is a near-Earth object with a diameter of 1.4 kilometers and potentially hazardous asteroid of the Apollo group.[1][2] It has a well determined orbit with an observation arc of 64 years including precovery images by Palomar Observatory dating back to 1954.[2]
Шаблон:Mp became the first object observed by NASA's NEO program to be assigned a positive rating on both the Torino Scale and the Palermo Technical Impact Hazard Scale[3] for a small chance of an impact on 1 February 2019, although it has now been known for years that it would pass Earth at roughly Шаблон:Convert on 13 January 2019 with an uncertainty region of around ±108 km.[4]
Discovery
It was discovered on 9 July 2002 by the Lincoln Near-Earth Asteroid Research team (LINEAR) at the U.S. Lincoln Laboratory Experimental Test Site near Socorro, New Mexico.[5] At the time of discovery it only had a 6-day observation arc of 9–14 July,[5] which poorly constrained possible future positions of the asteroid.
Despite inflammatory press reports, the object had a "low probability" of impact, approximately one in a million, for 1 February 2019.[6] On 22 July 2002, NEODyS posted a positive 0.18 Palermo Scale rating.[3] Further observations of the object quickly lowered the probability. On 25 July 2002, the hazard rating on the Palermo scale was lowered to −0.25. However, the discovery of the object with a Palermo initial rating of 0.06[7] was a historical event for the NEO observation program.
Шаблон:Mp was removed from the Sentry Risk Table on 1 August 2002 (23 days after discovery), meaning there is no risk of an impact by it in the next 100 years.[8] On 13 January 2019, the asteroid safely passed Шаблон:Convert from Earth with a 3-sigma uncertainty region of about ±108 km.[4] Between 1900 and 2195 the closest approach to Earth will occur on 15 January 2099 at a distance of roughly Шаблон:Convert with an uncertainty region of about ±430 km.[4]
On 30 January 2020, the asteroid safely passed Шаблон:Convert from 2 Pallas.[9]
References
External links
- Simulation of the shrinking uncertainty region for 2019 Jan 28Шаблон:Snd Peter Thomas
- 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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