(89959) 2002 NT7

Asteroid July 2026 March 2020 yes (89959) 2002 NT 7 #FFC2E0 9 July 2002 LINEAR Lincoln Lab's ETS (89959) 2002 NT 7 Apollo NEO PHA 23 March 2018 (JD 2457800.5) 0 62.68 yr (22,894 days) 2.6529 AU 0.8180 AU 1.7355 AU 0.5286 2.29 yr (835 days) 79.375° 0.4311 ms / day 42.333° 132.08° 300.67° 0.0004 AU km mi on off 1.407 0.085 km 0.224 0.053 16.4 (89959) 2002 NT 7 is a near-Earth object with a diameter of 1.4 kilometers and potentially hazardous asteroid of the Apollo group. It has a well determined orbit with an observation arc of 64 years including precovery images by Palomar Observatory dating back to 1954. 2002 NT 7 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 for a small chance of an impact on 1 February 2019, however it passed Earth at roughly 0.4078 AU km mi on on on 13 January 2019 with an uncertainty region of around ±108 km. 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. At the time of discovery it only had a 6-day observation arc of 9–14 July, 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. On 22 July 2002, NEODyS posted a positive 0.18 Palermo scale rating. Further observations, especially from Erich Meyer, 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 an initial Palermo scale rating of 0.06 was a historical event for the NEO observation program. 2002 NT 7 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. On 13 January 2019, the asteroid safely passed 0.4078 AU km mi on on from Earth with a 3-sigma uncertainty region of about ±108 km. Between 1900 and 2195 the closest approach to Earth will occur on 15 January 2099 at a distance of roughly 0.3739 AU km mi on off with an uncertainty region of about ±430 km. On 30 January 2020, the asteroid safely passed 0.02718 AU km mi on off from 2 Pallas. References MPEC 2002-N38 : 2002 NT7 IAU Minor Planet Center 2002-07-14 https://minorplanetcenter.net//iau/mpec/K02/K02N38.html (K02N07T) 2017-03-15 last obs. JPL Small-Body Database Browser: 89959 (2002 NT7) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2089959 Jet Propulsion Laboratory 26 April 2017 89959 (2002 NT7) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=89959 26 April 2017 6 A. Mainzer T. Grav J. Bauer J. Masiero R. S. McMillan R. M. Cutri R. Walker E. Wright P. Eisenhardt D. J. Tholen T. Spahr R. Jedicke L. Denneau E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand W. Mo J. Watkins A. Wilkins G. L. Bryngelson A. Del Pino Molina S. Desai M. Gómez Camus S. L. Hidalgo I. Konstantopoulos J. A. Larsen C. Maleszewski M. A. Malkan J.-C. Mauduit B. L. Mullan E. W. Olszewski J. Pforr A. Saro J. V. Scotti L. H. Wasserman December 2011 NEOWISE Observations of Near-Earth Objects: Preliminary Results https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...743..156M The Astrophysical Journal 743 2 17 2011ApJ...743..156M 10.1088/0004-637X/743/2/156 1109.6400 239991 26 April 2017 Asteroid 2002 NT7 Under Watch, But Probably Not Coming Our Way https://web.archive.org/web/20060405010848/http://www.planetary.org/news/2002/0725_Asteroid_2002_NT7_Under_Watch_But.html 2006-04-05 (25 July 2002) 29 March 2003 How A/CC broke the 2002 NT7 story hohmanntransfer http://www.hohmanntransfer.com/sas/nt7/index.html https://web.archive.org/web/20201106104922/http://www.hohmanntransfer.com/sas/nt7/index.html 2020-11-06 dead 2019-04-25 Date/Time Removed NASA/JPL Near-Earth Object Program Office http://neo.jpl.nasa.gov/risk/removed.html https://web.archive.org/web/20020602101400/http://neo.jpl.nasa.gov/risk/removed.html dead 2002-06-02 2011-05-06 24 July 2002 Space rock 'on collision course' BBC News http://news.bbc.co.uk/2/hi/science/nature/2147879.stm 2007-12-28 last observation: 2011-09-12; arc: 57 years JPL Close-Approach Data: 89959 (2002 NT7) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002NT7;cad=1#cad 2011-11-04 NEODyS-2 Close Approaches for (89959) 2002NT7 Near Earth Objects Dynamic Site https://newton.spacedys.com/neodys/index.php?pc=1.1.8&n=2002NT7 2011-11-05 External links Simulation of the shrinking uncertainty region for 2019 Jan 28 Peter Thomas 89958 89958 2002NT7 89959 (89958) 2002 LY45 89959 (89959) 2002 NT 7 90377 Sedna 089959 089959 089959 089959 20190113 20020709