(612600) 2003 SM84

Near-Earth asteroid February 2018 yes (612600) 2003 SM 84 #FFC2E0 LINEAR Lincoln Laboratory ETS 20 September 2003(first observed only) (612600) 2003 SM 84 NEOAmor 27 April 2019 (JD 2458600.5) 1 18.24 yr (6,663 d) 1.2177 AU 1.0331 AU 1.1254 AU 0.0820 1.19 yr (436 d) 279.101° 0.8256 ms / day 2.7961° 186.633° 87.375° 0.0510 AU(19.8685 LD) 75 m (est. at 0.20)140 m (est. at 0.057) 23.0 (612600) 2003 SM 84 is a sub-kilometer asteroid, classified as near-Earth object of the Amor group orbiting between Earth and Mars. It was first observed by the Lincoln Near-Earth Asteroid Research (LINEAR) at the Lincoln Laboratory ETS on 20 September 2003. As of 2026, this minor planet has not been named. 2003 SM 84 is an Amor asteroid – a subgroup of near-Earth asteroids that approach the orbit of Earth from beyond, but do not cross it. It orbits the Sun at a distance of 1.0–1.2 AU once every 14 months (436 days; semi-major axis of 1.22 AU). Its orbit has an eccentricity of 0.08 and an inclination of 3° with respect to the ecliptic. The body's observation arc begins with its first observation by LINEAR in 2003. The object's spectral type remains unknown. Using a magnitude-to-diameter conversion, 2003 SM 84 measures 75 and 140 meters in diameter, based on an absolute magnitude of 23.0 and an assumed albedo of 0.20 (S-type) and 0.057 (C-type), respectively. 2003 SM 84 was being considered by the European Space Agency as a candidate target for the Don Quijote mission to study the effects of impacting a spacecraft into an asteroid. References 2021-12-17 last obs. JPL Small-Body Database Browser: (2003 SM84) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2003sm84 Jet Propulsion Laboratory 15 January 2026 2003 SM84 Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2003+SM84 20 December 2019 Astronomy Without A Telescope – Impact Mitigation Steve Nerlich 13 August 2011 www.universetoday https://www.universetoday.com/88145/astronomy-without-a-telescope-impact-mitigation/ 20 December 2019 Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 20 December 2019 External links ESA Don Quijote mission 2003SM84 612600 (612600) 2003 SM 84 612600 612600 20030920