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Space Exploration & the Cosmos
A recently discovered asteroid had 'a very close encounter' with Earth
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<blockquote data-quote="Mayhem" data-source="post: 243190" data-attributes="member: 9738"><p>There was no reason to panic — an asteroid shot past our planet harmlessly Thursday night, NASA says. The space agency says the object — the size of a large moving truck — made one of the closest approaches to Earth ever when it zipped over the Southern Hemisphere.</p><p></p><p>NASA <a href="https://www.jpl.nasa.gov/news/nasa-system-predicts-small-asteroid-to-pass-close-by-earth-this-week" target="_blank">described it</a> as "a very close encounter with our planet."</p><p></p><p>The asteroid, dubbed 2023 BU, was only 2,200 miles above the Earth's surface when it passed over South America's southern edge at 7:27 p.m. ET, NASA says.</p><p></p><p><a href="https://www.npr.org/2023/01/08/1147685424/comet-green-january-e3-ztf-nasa" target="_blank"><img src="https://media.npr.org/assets/img/2023/01/07/c2022e3_ztf_bartlett800_sq-749200fce1e227e0a78276ae00d767350183848d-s300-c85.jpg" alt="Look up! You can see a bright green comet making a rare trip across the Earth's sky's sky" class="fr-fic fr-dii fr-draggable " style="" /></a></p><h3><a href="https://www.npr.org/sections/space/" target="_blank">SPACE</a></h3><h3><a href="https://www.npr.org/2023/01/08/1147685424/comet-green-january-e3-ztf-nasa" target="_blank">Look up! You can see a bright green comet making a rare trip across the Earth's sky</a></h3><p>For comparison, that's a little shorter than a straight-line trip from New York City to Las Vegas, which is about 2,230 miles <a href="https://www.distance.to/New-York/Las-Vegas#:~:text=The%20shortest%20distance%20(air%20line,2%2C230.61%20mi%20(3%2C589.82%20km).&text=The%20shortest%20route%20between%20New,44h%2046min." target="_blank">through the air</a>.</p><p></p><p>"In fact, this is one of the closest approaches by a known near-Earth object ever recorded," said Davide Farnocchia, a navigation engineer at NASA's Jet Propulsion Laboratory in Southern California, as the agency <a href="https://www.jpl.nasa.gov/news/nasa-system-predicts-small-asteroid-to-pass-close-by-earth-this-week" target="_blank">announced the close passage</a>.</p><p></p><p>Even if it did hit our planet, the small asteroid's main effect would be visual, as it would become a fireball in our atmosphere, with some debris likely falling as small meteorites.</p><p></p><p></p><p><a href="https://www.npr.org/2022/10/11/1128132956/nasa-dart-success-asteroid-dimorphos" target="_blank"><img src="https://media.npr.org/assets/img/2022/10/11/all_dimorphos_dart_0401930040_12262_01_iof_imagedisplay-final_sq-9210cddc42ee06160ac0f6f77cdcc5ed35f3ae9e-s300-c85.png" alt="NASA says its asteroid defense test was a success" class="fr-fic fr-dii fr-draggable " style="" /></a></p><h3><a href="https://www.npr.org/sections/space/" target="_blank">SPACE</a></h3><h3><a href="https://www.npr.org/2022/10/11/1128132956/nasa-dart-success-asteroid-dimorphos" target="_blank">NASA says its asteroid defense test was a success</a></h3><p>The asteroid arrived on short notice: 2023 BU was just discovered on Saturday by Crimean amateur astronomer Gennadiy Borisov, who has previously been credited with <a href="http://www.skaw.sk/interview-with-gennadiy-borisov.html" target="_blank">discovering a number of comets and asteroids</a>, including the first confirmed <a href="https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/2I-Borisov/in-depth/" target="_blank">interstellar comet</a>.</p><p></p><p><a href="https://cneos.jpl.nasa.gov/scout/#/" target="_blank">NASA's Scout system</a>, which assesses potential hazards, quickly determined that 2023 BU wouldn't hit Earth but "make an extraordinarily close approach," said Farnocchia, who developed the system.</p><p></p><p>News of the visit comes at a time when NASA has put new emphasis on planetary defense, detecting and analyzing objects that could pose an impact hazard. Last year, it even <a href="https://www.npr.org/2022/09/26/1124340144/nasa-dart-shove-asteroid-first-test-planetary-defense" target="_blank">tested a just-in-case plan</a> to ram an asteroid, if it someday becomes necessary to redirect an object away from Earth.</p><p></p><p><a href="https://www.npr.org/2023/01/12/1148523089/celestial-events-2023-solar-lunar-eclipse-meteor-shower" target="_blank"><img src="https://media.npr.org/assets/img/2023/01/11/moon-in-turkey_sq-01d658fb94be37a8ea94c1158079da628ff5aefd-s300-c85.jpg" alt="Stargazers, here are the most exciting celestial events for 2023" class="fr-fic fr-dii fr-draggable " style="" /></a></p><h3><a href="https://www.npr.org/sections/space/" target="_blank">SPACE</a></h3><h3><a href="https://www.npr.org/2023/01/12/1148523089/celestial-events-2023-solar-lunar-eclipse-meteor-shower" target="_blank">Stargazers, here are the most exciting celestial events for 2023</a></h3><p>2023 BU is much smaller than many other close-passing asteroids that have made headlines in recent years, <a href="https://www.npr.org/sections/thetwo-way/2015/01/26/381631144/an-asteroid-is-passing-very-close-to-earth-today-heres-how-to-see-it" target="_blank">one of which was</a> "the size of two Rose Bowl stadiums." But this asteroid is also coming much closer to our planet: some of those other objects stayed tens or hundreds of thousands of miles away.</p><p></p><p>The asteroid's visit brought it well within the cloud of geosynchronous satellites around Earth, getting around 10 times closer to the planet's surface than those objects, which <a href="https://earthobservatory.nasa.gov/features/OrbitsCatalog/page2.php" target="_blank">maintain a high orbit</a>.</p><p></p><p></p><p></p><p>[URL unfurl="true"]https://www.npr.org/2023/01/26/1151667749/asteroid-coming-close-earth#:~:text=NASA%20described%20it%20as%20%22a,27%20p.m.%20ET%2C%20NASA%20says.[/URL]</p></blockquote><p></p>
[QUOTE="Mayhem, post: 243190, member: 9738"] There was no reason to panic — an asteroid shot past our planet harmlessly Thursday night, NASA says. The space agency says the object — the size of a large moving truck — made one of the closest approaches to Earth ever when it zipped over the Southern Hemisphere. NASA [URL='https://www.jpl.nasa.gov/news/nasa-system-predicts-small-asteroid-to-pass-close-by-earth-this-week']described it[/URL] as "a very close encounter with our planet." The asteroid, dubbed 2023 BU, was only 2,200 miles above the Earth's surface when it passed over South America's southern edge at 7:27 p.m. ET, NASA says. [URL='https://www.npr.org/2023/01/08/1147685424/comet-green-january-e3-ztf-nasa'][IMG alt="Look up! You can see a bright green comet making a rare trip across the Earth's sky's sky"]https://media.npr.org/assets/img/2023/01/07/c2022e3_ztf_bartlett800_sq-749200fce1e227e0a78276ae00d767350183848d-s300-c85.jpg[/IMG][/URL] [HEADING=2][URL='https://www.npr.org/sections/space/']SPACE[/URL][/HEADING] [HEADING=2][URL='https://www.npr.org/2023/01/08/1147685424/comet-green-january-e3-ztf-nasa']Look up! You can see a bright green comet making a rare trip across the Earth's sky[/URL][/HEADING] For comparison, that's a little shorter than a straight-line trip from New York City to Las Vegas, which is about 2,230 miles [URL='https://www.distance.to/New-York/Las-Vegas#:~:text=The%20shortest%20distance%20(air%20line,2%2C230.61%20mi%20(3%2C589.82%20km).&text=The%20shortest%20route%20between%20New,44h%2046min.']through the air[/URL]. "In fact, this is one of the closest approaches by a known near-Earth object ever recorded," said Davide Farnocchia, a navigation engineer at NASA's Jet Propulsion Laboratory in Southern California, as the agency [URL='https://www.jpl.nasa.gov/news/nasa-system-predicts-small-asteroid-to-pass-close-by-earth-this-week']announced the close passage[/URL]. Even if it did hit our planet, the small asteroid's main effect would be visual, as it would become a fireball in our atmosphere, with some debris likely falling as small meteorites. [URL='https://www.npr.org/2022/10/11/1128132956/nasa-dart-success-asteroid-dimorphos'][IMG alt="NASA says its asteroid defense test was a success"]https://media.npr.org/assets/img/2022/10/11/all_dimorphos_dart_0401930040_12262_01_iof_imagedisplay-final_sq-9210cddc42ee06160ac0f6f77cdcc5ed35f3ae9e-s300-c85.png[/IMG][/URL] [HEADING=2][URL='https://www.npr.org/sections/space/']SPACE[/URL][/HEADING] [HEADING=2][URL='https://www.npr.org/2022/10/11/1128132956/nasa-dart-success-asteroid-dimorphos']NASA says its asteroid defense test was a success[/URL][/HEADING] The asteroid arrived on short notice: 2023 BU was just discovered on Saturday by Crimean amateur astronomer Gennadiy Borisov, who has previously been credited with [URL='http://www.skaw.sk/interview-with-gennadiy-borisov.html']discovering a number of comets and asteroids[/URL], including the first confirmed [URL='https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/2I-Borisov/in-depth/']interstellar comet[/URL]. [URL='https://cneos.jpl.nasa.gov/scout/#/']NASA's Scout system[/URL], which assesses potential hazards, quickly determined that 2023 BU wouldn't hit Earth but "make an extraordinarily close approach," said Farnocchia, who developed the system. News of the visit comes at a time when NASA has put new emphasis on planetary defense, detecting and analyzing objects that could pose an impact hazard. Last year, it even [URL='https://www.npr.org/2022/09/26/1124340144/nasa-dart-shove-asteroid-first-test-planetary-defense']tested a just-in-case plan[/URL] to ram an asteroid, if it someday becomes necessary to redirect an object away from Earth. [URL='https://www.npr.org/2023/01/12/1148523089/celestial-events-2023-solar-lunar-eclipse-meteor-shower'][IMG alt="Stargazers, here are the most exciting celestial events for 2023"]https://media.npr.org/assets/img/2023/01/11/moon-in-turkey_sq-01d658fb94be37a8ea94c1158079da628ff5aefd-s300-c85.jpg[/IMG][/URL] [HEADING=2][URL='https://www.npr.org/sections/space/']SPACE[/URL][/HEADING] [HEADING=2][URL='https://www.npr.org/2023/01/12/1148523089/celestial-events-2023-solar-lunar-eclipse-meteor-shower']Stargazers, here are the most exciting celestial events for 2023[/URL][/HEADING] 2023 BU is much smaller than many other close-passing asteroids that have made headlines in recent years, [URL='https://www.npr.org/sections/thetwo-way/2015/01/26/381631144/an-asteroid-is-passing-very-close-to-earth-today-heres-how-to-see-it']one of which was[/URL] "the size of two Rose Bowl stadiums." But this asteroid is also coming much closer to our planet: some of those other objects stayed tens or hundreds of thousands of miles away. The asteroid's visit brought it well within the cloud of geosynchronous satellites around Earth, getting around 10 times closer to the planet's surface than those objects, which [URL='https://earthobservatory.nasa.gov/features/OrbitsCatalog/page2.php']maintain a high orbit[/URL]. [URL unfurl="true"]https://www.npr.org/2023/01/26/1151667749/asteroid-coming-close-earth#:~:text=NASA%20described%20it%20as%20%22a,27%20p.m.%20ET%2C%20NASA%20says.[/URL] [/QUOTE]
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A recently discovered asteroid had 'a very close encounter' with Earth
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