(89959) 2002 NT7
Template:Use mdy dates Template:Infobox planet
Template:Mp (provisional designation Template: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]
Template: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 scale[3] for a small chance of an impact on 1 February 2019, however it passed Earth at roughly Template: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, especially from Erich Meyer, quickly lowered the probability. [1]. On 25 July 2002, the hazard rating on the Palermo scale was lowered to −0.25. However, the discovery of the object with an initial Palermo scale rating of 0.06[7] was a historical event for the NEO observation program.
Template: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 Template: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 Template:Convert with an uncertainty region of about ±430 km.[4]
On 30 January 2020, the asteroid safely passed Template:Convert from 2 Pallas.[9]
References
- ↑ Template:Cite web
- ↑ 2.0 2.1 Template:Cite web
- ↑ 3.0 3.1 Template:Cite web
- ↑ 4.0 4.1 4.2 Template:Cite web
- ↑ 5.0 5.1 Template:Cite web (K02N07T)
- ↑ Asteroid 2002 NT7 Under Watch, But Probably Not Coming Our Way Template:Webarchive (25 July 2002)
- ↑ Template:Cite news
- ↑ Template:Cite web
- ↑ Template:Cite web
Cite error: <ref> tag with name "Mainzer-2011" defined in <references> is not used in prior text.
External links
- Simulation of the shrinking uncertainty region for 2019 Jan 28Template:Snd Peter Thomas
- Template:NeoDys
- Template:ESA-SSA
- Template:JPL small body
Template:Minor planets navigator Template:Small Solar System bodies Template:Authority control