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- 1991_BA abstract "1991 BA is an asteroid that was discovered by Spacewatch on January 18, 1991 and passed within 160,000 km (100,000 mi) of Earth. This is a little less than half the distance to the Moon. 1991 BA is approximately 5 to 10 meters (15 to 30 ft) in diameter and is listed on the Sentry Risk Table. It follows a highly eccentric (0.682), low-inclination (2.0°) orbit of 3.36 years duration, ranging between 0.713 and 3.773 AU from the Sun (semi-major axis of 2.243 AU). 1991 BA was, at the time of its discovery, the smallest and closest confirmed asteroid outside of Earth's atmosphere. 1991 BA is too faint to be observed except during close approaches to Earth and is considered lost.Virtual clones of the asteroid that fit the uncertainty region in the known trajectory show a 1 in 1,961,000 chance that the asteroid will impact Earth on 2023 January 18. It is estimated that an impact would produce an upper atmosphere air burst equivalent to 19 kt TNT, roughly equal to Nagasaki's Fat Man. The asteroid would appear as a bright fireball and fragment in the air burst into smaller pieces that would hit the ground at terminal velocity producing a meteorite strewn field. Impacts of objects this size are estimated to occur approximately once a year. Asteroid 2008 TC3 was an object of similar size that was discovered less than a day before its impact on Earth on October 7, 2008 and produced a fireball and meteorite strewn field in the Sudan.".
- 1991_BA wikiPageExternalLink Item1.
- 1991_BA wikiPageID "4235559".
- 1991_BA wikiPageLength "3102".
- 1991_BA wikiPageOutDegree "20".
- 1991_BA wikiPageRevisionID "708102178".
- 1991_BA wikiPageWikiLink Air_burst.
- 1991_BA wikiPageWikiLink Asteroid.
- 1991_BA wikiPageWikiLink Astronomical_unit.
- 1991_BA wikiPageWikiLink Category:Apollo_asteroids.
- 1991_BA wikiPageWikiLink Category:Astronomical_objects_discovered_in_1991.
- 1991_BA wikiPageWikiLink Category:Lost_minor_planets.
- 1991_BA wikiPageWikiLink Category:Near-Earth_objects_in_1991.
- 1991_BA wikiPageWikiLink Central_Bureau_for_Astronomical_Telegrams.
- 1991_BA wikiPageWikiLink Earth.
- 1991_BA wikiPageWikiLink Fat_Man.
- 1991_BA wikiPageWikiLink Impact_event.
- 1991_BA wikiPageWikiLink Lost_minor_planet.
- 1991_BA wikiPageWikiLink Moon.
- 1991_BA wikiPageWikiLink Near_space.
- 1991_BA wikiPageWikiLink Nuclear_weapon_yield.
- 1991_BA wikiPageWikiLink Sentry_(monitoring_system).
- 1991_BA wikiPageWikiLink Spacewatch.
- 1991_BA wikiPageWikiLink Strewn_field.
- 1991_BA wikiPageWikiLink Sudan.
- 1991_BA wikiPageWikiLink Sun.
- 1991_BA wikiPageWikiLinkText "1991 BA".
- 1991_BA wikiPageUsesTemplate Template:JPL_small_body.
- 1991_BA wikiPageUsesTemplate Template:Mpl.
- 1991_BA wikiPageUsesTemplate Template:Reflist.
- 1991_BA wikiPageUsesTemplate Template:Small_Solar_System_bodies.
- 1991_BA subject Category:Apollo_asteroids.
- 1991_BA subject Category:Astronomical_objects_discovered_in_1991.
- 1991_BA subject Category:Lost_minor_planets.
- 1991_BA subject Category:Near-Earth_objects_in_1991.
- 1991_BA hypernym Asteroid.
- 1991_BA type Planet.
- 1991_BA type Object.
- 1991_BA comment "1991 BA is an asteroid that was discovered by Spacewatch on January 18, 1991 and passed within 160,000 km (100,000 mi) of Earth. This is a little less than half the distance to the Moon. 1991 BA is approximately 5 to 10 meters (15 to 30 ft) in diameter and is listed on the Sentry Risk Table. It follows a highly eccentric (0.682), low-inclination (2.0°) orbit of 3.36 years duration, ranging between 0.713 and 3.773 AU from the Sun (semi-major axis of 2.243 AU).".
- 1991_BA label "1991 BA".
- 1991_BA sameAs Q3597924.
- 1991_BA sameAs १९९१_बीए.
- 1991_BA sameAs 1991_BA.
- 1991_BA sameAs 1991_BA.
- 1991_BA sameAs 1991_BA.
- 1991_BA sameAs m.0brfcx.
- 1991_BA sameAs Q3597924.
- 1991_BA sameAs 1991_BA.
- 1991_BA wasDerivedFrom 1991_BA?oldid=708102178.
- 1991_BA isPrimaryTopicOf 1991_BA.