2009 DD45

Near-Earth asteroid September 2020 yes 2009 DD 45 #FFC2E0 Астероид 2009 DD45.gif 2009 DD 45: orbital animation of its 2009-flyby SSS Siding Spring Obs. 27 February 2009 2009 DD 45 NEOApollo 21 November 2025 (JD 2461000.5) 42 7 days 1.4951 AU 0.9867 AU 1.2409 AU 0.2048 1.38 yr (505 d) 25.653° 0.7130 ms / day 13.744° 161.89° 13.972° 0.000385 AU LD on on 3 19 4 m (est. at 0.36) 1.2 h (poor) 0.36 (est.) SMASS S 25.8 2009 DD 45 is a very small Apollo asteroid that passed near Earth at an altitude of 63,500 km mi on on 2 March 2009 at 13:44 UTC. It was discovered by Australian astronomers with the Siding Spring Survey at the Siding Spring Observatory on 27 February 2009, only three days before its closest approach to the Earth. Its estimated diameter is between 15 and 23 metres. This is about the same size as a hypothetical object that could have caused the Tunguska event in 1908. BBC News Online cites the minimum distance as 72,000 km mi on (about 1/5 lunar distances).Scientific American, May 2009 issue, listed the minimum distance as 72,200 km (p. 26) 2009 DD 45 passed farther away (40 thousand miles versus 4 thousand miles) but was substantially larger than 2004 FU 162, a small asteroid about 6 m (20 ft) across which came within about 6,500 km mi on in 2004, and is more similar in size to 2004 FH. With an observation arc of 7 days and an uncertainty parameter of 4, the asteroid will make its next close encounter with Earth on 29 February 2056 and then potentially around 3 March 2067. See also List of asteroid close approaches to Earth in 2009 References 30em 2009-03-06 last obs. JPL Small-Body Database Browser: (2009 DD45) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3448992 Jet Propulsion Laboratory 9 September 2020 2009 DD45 Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2009+DD45 9 September 2020 2009 DD45 9 September 2020 http://www.skyandtelescope.com/community/skyblog/observingblog/40504617.html Space Rock 2009 DD45 Buzzes Earth 2009-03-01 Kelly Beatty Sky & Telescope 2009-03-04 https://archive.today/20090306071211/http://www.skyandtelescope.com/community/skyblog/observingblog/40504617.html 6 March 2009 dead http://news.nationalgeographic.com/news/2009/03/090302-asteroid-earth.html Surprise Asteroid Just Buzzed Earth 2009-03-02 Victoria Jaggard National Geographic Society 2009-03-04 https://web.archive.org/web/20090304084808/http://news.nationalgeographic.com/news/2009/03/090302-asteroid-earth.html 4 March 2009 dead https://news.bbc.co.uk/2/hi/science/nature/7921279.stm Space rock makes close approach 2009-03-03 BBC News Online 2009-03-03 https://web.archive.org/web/20090304094851/http://news.bbc.co.uk/1/hi/sci/tech/7921279.stm 4 March 2009 live External links Universe Today article on 2009 DD45 100-meter asteroid will pass Earth Monday! https://web.archive.org/web/20090303153932/http://blogs.discovermagazine.com/badastronomy/2009/03/01/100-meter-asteroid-will-pass-earth-monday/ 3 March 2009 , Phil Plait's Bad Astronomy blog _RKKgMDK7A4 NEO Asteroid 2009 DD45 from Canberra List Of Apollo Minor Planets (by designation), Minor Planet Center 2009+DD45 2009DD45 # # Category:Minor planet object articles (unnumbered) 20090302 20090227