2009 RR

Small risk–listed near-Earth asteroid February 2018 #FFC2E0 2009 RR Catalina Sky Survey (703) 11 September 2009 2009 RR NEO Apollo 13 January 2016 (JD 2457400.5) 4 days (last seen 2009) 2.0753 AU Gm on on 0.75416 AU Gm on 1.4147 AU Gm on 0.46693 1.68 yr (614.63 d) 6.1464° 174.21° 252.65° 256.21° ~26 m us 20–45 metersMarch 2020 2.4e7 kg (assumed) 25.5 0.58572 ms /day (n) 7 0.0028846 AU km on 2009 RR is a micro-asteroid, classified as a near-Earth object of the Apollo group. It was discovered on 11 September 2009 by the Catalina Sky Survey at an apparent magnitude of 19.5 using a 0.68 m in on us Schmidt–Cassegrain telescope. 2009 RR was the only asteroid discovered before 2014 that was predicted to potentially pass inside the orbit of the Moon during 2014. The asteroid has an estimated diameter of 26 m us and is listed on the Sentry Risk Table. It is not large enough to qualify as a potentially hazardous object. Description With an observation arc of only 4 days, the asteroid has a poorly determined orbit. It is already known that there is no risk of an Earth impact before 2098. The power of such an air burst would be somewhere between the Chelyabinsk meteor and the Tunguska event depending on the actual size of the asteroid. The nominal orbit shows that on 16 September 2014 the asteroid could have passed just inside one lunar distance from Earth, but the orbital uncertainties show that it could have passed as much as 0.1 AU km mi on on from Earth. On 9 September 2014 the full moon may have only been 15 degrees from the 20th magnitude asteroid, making it difficult to detect the asteroid. The asteroid was estimated to be brighter than magnitude 20 from 10 September until 16 September 2014. 2009 RR was not recovered during the 2014 approach and thus probably passed more than one lunar distance from Earth. References last observation: 2009-09-15; arc: 4 days JPL Small-Body Database Browser: (2009 RR) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009RR Jet Propulsion Laboratory 30 March 2016 MPEC 2009-R39 : 2009 RR IAU Minor Planet Center 2009-09-11 https://www.minorplanetcenter.net/mpec/K09/K09R39.html 2014-01-13 (K09R00R) Earth Impact Risk Summary: 2009 RR NASA/JPL Near-Earth Object Program Office https://cneos.jpl.nasa.gov/sentry/details.html#?des=2009%20RR 2018-01-22 last observation: 2009-09-15; arc: 4 days JPL Close-Approach Data: (2009 RR) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009RR;cad=1#cad https://archive.today/20140805062943/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2009RR;cad=1%23cad#cad 5 August 2014 live 2014-01-13 2009RR Ephemerides for September 2014 NEODyS (Near Earth Objects Dynamic Site) http://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2009RR&oc=500&y0=2014&m0=9&d0=9&h0=0&mi0=0&y1=2014&m1=9&d1=17&h1=0&mi1=0&ti=1.0&tiu=days https://archive.today/20140115202331/http://newton.dm.unipi.it/neodys/index.php?pc=1.1.3.1&n=2009RR&oc=500&y0=2014&m0=9&d0=9&h0=0&mi0=0&y1=2014&m1=9&d1=17&h1=0&mi1=0&ti=1.0&tiu=days 15 January 2014 live 2014-01-15 External links 2009RR 2009RR 3467062 # Category:Minor planet object articles (unnumbered) Category:Discoveries by the Catalina Sky Survey Category:Potential impact events caused by near-Earth objects 20140916 20090911