#asteroidthreat — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #asteroidthreat, aggregated by home.social.
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The #NEO population is roughly 100,000 at the size of about 60 m, and if we go all the way down to a few meters in size, the population of #NEAs ☄️ is over a billion.
#DART smashed into the 160 m, 5.5-million-ton #asteroid #Dimorphos. If you wanted to deflect an asteroid 10 times larger, you’d need 1,000 DARTs to get the same minuscule deflection.
In April 2029, an #asteroid the size of an aircraft carrier 🚢 will be passing much closer than the Moon. https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
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The #NEO population is roughly 100,000 at the size of about 60 m, and if we go all the way down to a few meters in size, the population of #NEAs ☄️ is over a billion.
#DART smashed into the 160 m, 5.5-million-ton #asteroid #Dimorphos. If you wanted to deflect an asteroid 10 times larger, you’d need 1,000 DARTs to get the same minuscule deflection.
In April 2029, an #asteroid the size of an aircraft carrier 🚢 will be passing much closer than the Moon. https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
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The #NEO population is roughly 100,000 at the size of about 60 m, and if we go all the way down to a few meters in size, the population of #NEAs ☄️ is over a billion.
#DART smashed into the 160 m, 5.5-million-ton #asteroid #Dimorphos. If you wanted to deflect an asteroid 10 times larger, you’d need 1,000 DARTs to get the same minuscule deflection.
In April 2029, an #asteroid the size of an aircraft carrier 🚢 will be passing much closer than the Moon. https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
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The #NEO population is roughly 100,000 at the size of about 60 m, and if we go all the way down to a few meters in size, the population of #NEAs ☄️ is over a billion.
#DART smashed into the 160 m, 5.5-million-ton #asteroid #Dimorphos. If you wanted to deflect an asteroid 10 times larger, you’d need 1,000 DARTs to get the same minuscule deflection.
In April 2029, an #asteroid the size of an aircraft carrier 🚢 will be passing much closer than the Moon. https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
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The #NEO population is roughly 100,000 at the size of about 60 m, and if we go all the way down to a few meters in size, the population of #NEAs ☄️ is over a billion.
#DART smashed into the 160 m, 5.5-million-ton #asteroid #Dimorphos. If you wanted to deflect an asteroid 10 times larger, you’d need 1,000 DARTs to get the same minuscule deflection.
In April 2029, an #asteroid the size of an aircraft carrier 🚢 will be passing much closer than the Moon. https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
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Objects larger than 140 meters 📏 are closely tracked as they could cause significant regional damage if they impact 💥, yet scientists estimate that only about 40% 📊 of these mid-sized #NEOs have been identified so far. Among the newly identified objects are 33 previously unknown #NEOs, the largest is about 500 meters wide. #Rubin is expected to reveal an additional 90,000 new NEOs, some of which may be potentially hazardous https://rubinobservatory.org/news/11000-new-asteroids
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Objects larger than 140 meters 📏 are closely tracked as they could cause significant regional damage if they impact 💥, yet scientists estimate that only about 40% 📊 of these mid-sized #NEOs have been identified so far. Among the newly identified objects are 33 previously unknown #NEOs, the largest is about 500 meters wide. #Rubin is expected to reveal an additional 90,000 new NEOs, some of which may be potentially hazardous https://rubinobservatory.org/news/11000-new-asteroids
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Objects larger than 140 meters 📏 are closely tracked as they could cause significant regional damage if they impact 💥, yet scientists estimate that only about 40% 📊 of these mid-sized #NEOs have been identified so far. Among the newly identified objects are 33 previously unknown #NEOs, the largest is about 500 meters wide. #Rubin is expected to reveal an additional 90,000 new NEOs, some of which may be potentially hazardous https://rubinobservatory.org/news/11000-new-asteroids
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Objects larger than 140 meters 📏 are closely tracked as they could cause significant regional damage if they impact 💥, yet scientists estimate that only about 40% 📊 of these mid-sized #NEOs have been identified so far. Among the newly identified objects are 33 previously unknown #NEOs, the largest is about 500 meters wide. #Rubin is expected to reveal an additional 90,000 new NEOs, some of which may be potentially hazardous https://rubinobservatory.org/news/11000-new-asteroids
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Objects larger than 140 meters 📏 are closely tracked as they could cause significant regional damage if they impact 💥, yet scientists estimate that only about 40% 📊 of these mid-sized #NEOs have been identified so far. Among the newly identified objects are 33 previously unknown #NEOs, the largest is about 500 meters wide. #Rubin is expected to reveal an additional 90,000 new NEOs, some of which may be potentially hazardous https://rubinobservatory.org/news/11000-new-asteroids
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1 033 #astronomical observatories 🌌 🔭 in #OpenStreetMap https://taginfo.openstreetmap.org/tags/observatory%3Atype=astronomical#map
2 418 radio telescopes https://taginfo.openstreetmap.org/tags/telescope%3Atype=radio
1 323 optical telescopes https://taginfo.openstreetmap.org/tags/telescope%3Atype=optical -
1 033 #astronomical observatories 🌌 🔭 in #OpenStreetMap https://taginfo.openstreetmap.org/tags/observatory%3Atype=astronomical#map
2 418 radio telescopes https://taginfo.openstreetmap.org/tags/telescope%3Atype=radio
1 323 optical telescopes https://taginfo.openstreetmap.org/tags/telescope%3Atype=optical -
The most unsettling thing about the #Chelyabinsk ☄️ event is that nobody saw it coming. The explosion 💥 created a shockwave that is estimated to have released around 30 times more energy than the atomic bomb detonated at Hiroshima, damaging 7,200 buildings across six cities and sending 1,500 people to local hospitals and clinics with injuries. If the #asteroid had hit the ground intact, the damage could have been unlike anything in human history https://www.planetary.org/articles/what-was-the-chelyabinsk-meteor-event
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The most unsettling thing about the #Chelyabinsk ☄️ event is that nobody saw it coming. The explosion 💥 created a shockwave that is estimated to have released around 30 times more energy than the atomic bomb detonated at Hiroshima, damaging 7,200 buildings across six cities and sending 1,500 people to local hospitals and clinics with injuries. If the #asteroid had hit the ground intact, the damage could have been unlike anything in human history https://www.planetary.org/articles/what-was-the-chelyabinsk-meteor-event
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The #meteor ☄️, measuring about 1 meter wide 📏, entered the atmosphere traveling at 120,000 kilometers per hour when it broke apart at an altitude of 64 kilometers. It released energy equivalent to about 300 tons of TNT 💥 https://www.dw.com/en/meteor-explodes-over-united-states-triggering-sonic-boom/a-77361548
📊 453 fireball sightings in 2026 https://fireball.amsmeteors.org//members/imo_view/browse_events?country=-1&year=2026
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The #meteor ☄️, measuring about 1 meter wide 📏, entered the atmosphere traveling at 120,000 kilometers per hour when it broke apart at an altitude of 64 kilometers. It released energy equivalent to about 300 tons of TNT 💥 https://www.dw.com/en/meteor-explodes-over-united-states-triggering-sonic-boom/a-77361548
📊 453 fireball sightings in 2026 https://fireball.amsmeteors.org//members/imo_view/browse_events?country=-1&year=2026
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“You can only do something to address a threat if you know about it,” Moissl says. “So the very first step in the whole chain is observations 🔭. You need to find the #asteroids.” https://www.sciencefocus.com/space/asteroids-team-saving-earth
"If necessary, we can build a spacecraft to deflect an #asteroid ☄️ in four years" ⏳🥱 https://www.mundoamerica.com/entertainment/2025/02/24/67bc4638fc6c83360e8b4591.html
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“You can only do something to address a threat if you know about it,” Moissl says. “So the very first step in the whole chain is observations 🔭. You need to find the #asteroids.” https://www.sciencefocus.com/space/asteroids-team-saving-earth
"If necessary, we can build a spacecraft to deflect an #asteroid ☄️ in four years" ⏳🥱 https://www.mundoamerica.com/entertainment/2025/02/24/67bc4638fc6c83360e8b4591.html
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#Asteroid #2017SH33 ☄️ was last observed 🔭 in 2017 https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2017%20SH33 and estimated 700m-1.6 km in diameter https://neo.ssa.esa.int/risk-list. It might impact 💥 2026-04-30 (but we haven't a clue as there isn't any recent data)
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#Asteroid #2017SH33 ☄️ was last observed 🔭 in 2017 https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2017%20SH33 and estimated 700m-1.6 km in diameter https://neo.ssa.esa.int/risk-list. It might impact 💥 2026-04-30 (but we haven't a clue as there isn't any recent data)
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The #meteorite ☄️ crashed through the roof of a two-story house. It hit the floor in a bedroom, where it ricocheted and struck another part of the ceiling https://www.nytimes.com/2026/03/22/us/meteorite-crash-texas-home.html
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The #meteorite ☄️ crashed through the roof of a two-story house. It hit the floor in a bedroom, where it ricocheted and struck another part of the ceiling https://www.nytimes.com/2026/03/22/us/meteorite-crash-texas-home.html
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#NASA’s #NEOSurveyor mission is now slated for no earlier than 📆 mid-2027, will spend at least five years scanning for potentially hazardous #asteroids ☄️ larger than 140 meters.
#NEOHunter - nearly nine times more massive than #DART - could execute a direct high-energy impact 💥, delivering approximately 1.5 times the kinetic energy
https://www.nasaspaceflight.com/2026/03/blue-origin-neo-hunter-planetary-defense/ -
#NASA’s #NEOSurveyor mission is now slated for no earlier than 📆 mid-2027, will spend at least five years scanning for potentially hazardous #asteroids ☄️ larger than 140 meters.
#NEOHunter - nearly nine times more massive than #DART - could execute a direct high-energy impact 💥, delivering approximately 1.5 times the kinetic energy
https://www.nasaspaceflight.com/2026/03/blue-origin-neo-hunter-planetary-defense/ -
#LSST performs very well for large impactors ☄️, discovering about 79.7% of objects larger than 140 m before impact. Only 50.3% of 50–140 m impactors, 26.8% of 20–50 m impactors, and 10.5% of 10–20 m impactors are discovered 🔭 at all. About 60% of large impactors fail to reach a one-year warning threshold. Upper mid-size objects are usually discovered only a few months before impact 💥 https://www.newplanetarium.com/journal/2026-01-29
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#LSST performs very well for large impactors ☄️, discovering about 79.7% of objects larger than 140 m before impact. Only 50.3% of 50–140 m impactors, 26.8% of 20–50 m impactors, and 10.5% of 10–20 m impactors are discovered 🔭 at all. About 60% of large impactors fail to reach a one-year warning threshold. Upper mid-size objects are usually discovered only a few months before impact 💥 https://www.newplanetarium.com/journal/2026-01-29
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14:43 - The #Torino scale explained "10 is a really bad day for the #dinosaurs" 🦕 (including a really nice #Trump #parody 😄) https://www.youtube.com/watch?v=DK3tW1E615Y
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14:43 - The #Torino scale explained "10 is a really bad day for the #dinosaurs" 🦕 (including a really nice #Trump #parody 😄) https://www.youtube.com/watch?v=DK3tW1E615Y
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Between 140 meters and 1 km : 10,624 #asteroids ☄️ discovered 🔭 https://ourworldindata.org/data-insights/over-33000-near-earth-asteroids-have-been-detected-since-1990
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Between 140 meters and 1 km : 10,624 #asteroids ☄️ discovered 🔭 https://ourworldindata.org/data-insights/over-33000-near-earth-asteroids-have-been-detected-since-1990
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A solution to mitigate low #deflection efficiency is to apply multiple low-energy impactors rather than a single high-energy impactor 💥. A lower kinetic energy impactor results in a smaller crater 🕳️ that is less affected by global curvature, increasing momentum transfer efficiency https://www.nature.com/articles/s41467-025-56010-w
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A solution to mitigate low #deflection efficiency is to apply multiple low-energy impactors rather than a single high-energy impactor 💥. A lower kinetic energy impactor results in a smaller crater 🕳️ that is less affected by global curvature, increasing momentum transfer efficiency https://www.nature.com/articles/s41467-025-56010-w
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A solution to mitigate low #deflection efficiency is to apply multiple low-energy impactors rather than a single high-energy impactor 💥. A lower kinetic energy impactor results in a smaller crater 🕳️ that is less affected by global curvature, increasing momentum transfer efficiency https://www.nature.com/articles/s41467-025-56010-w
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A solution to mitigate low #deflection efficiency is to apply multiple low-energy impactors rather than a single high-energy impactor 💥. A lower kinetic energy impactor results in a smaller crater 🕳️ that is less affected by global curvature, increasing momentum transfer efficiency https://www.nature.com/articles/s41467-025-56010-w
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A solution to mitigate low #deflection efficiency is to apply multiple low-energy impactors rather than a single high-energy impactor 💥. A lower kinetic energy impactor results in a smaller crater 🕳️ that is less affected by global curvature, increasing momentum transfer efficiency https://www.nature.com/articles/s41467-025-56010-w
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Any useful deflection of a larger #asteroid ☄️ would require a far greater shove or need to occur decades ahead of an impending collision 💥 to have a cumulative effect. You’d need 1,000 #DARTs to get the same deflection https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
Discovery 🔭
after closest approach: 69 (46.0%)
< 24 hours : 32 (21.3%)
up to 7 days : 47 (31.3%)
> one week : 2 (1.3%)
> 7 weeks : 0 (0.0%)
> one year : 0 (0.0%)
https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025#Dimorphos #Didymos #AsteroidThreat #AsteroidDeflection #NASA #DART
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Any useful deflection of a larger #asteroid ☄️ would require a far greater shove or need to occur decades ahead of an impending collision 💥 to have a cumulative effect. You’d need 1,000 #DARTs to get the same deflection https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
Discovery 🔭
after closest approach: 69 (46.0%)
< 24 hours : 32 (21.3%)
up to 7 days : 47 (31.3%)
> one week : 2 (1.3%)
> 7 weeks : 0 (0.0%)
> one year : 0 (0.0%)
https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025#Dimorphos #Didymos #AsteroidThreat #AsteroidDeflection #NASA #DART
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Any useful deflection of a larger #asteroid ☄️ would require a far greater shove or need to occur decades ahead of an impending collision 💥 to have a cumulative effect. You’d need 1,000 #DARTs to get the same deflection https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
Discovery 🔭
after closest approach: 69 (46.0%)
< 24 hours : 32 (21.3%)
up to 7 days : 47 (31.3%)
> one week : 2 (1.3%)
> 7 weeks : 0 (0.0%)
> one year : 0 (0.0%)
https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025#Dimorphos #Didymos #AsteroidThreat #AsteroidDeflection #NASA #DART
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Any useful deflection of a larger #asteroid ☄️ would require a far greater shove or need to occur decades ahead of an impending collision 💥 to have a cumulative effect. You’d need 1,000 #DARTs to get the same deflection https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
Discovery 🔭
after closest approach: 69 (46.0%)
< 24 hours : 32 (21.3%)
up to 7 days : 47 (31.3%)
> one week : 2 (1.3%)
> 7 weeks : 0 (0.0%)
> one year : 0 (0.0%)
https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025#Dimorphos #Didymos #AsteroidThreat #AsteroidDeflection #NASA #DART
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Any useful deflection of a larger #asteroid ☄️ would require a far greater shove or need to occur decades ahead of an impending collision 💥 to have a cumulative effect. You’d need 1,000 #DARTs to get the same deflection https://www.astronomy.com/science/how-we-track-near-earth-asteroids/
Discovery 🔭
after closest approach: 69 (46.0%)
< 24 hours : 32 (21.3%)
up to 7 days : 47 (31.3%)
> one week : 2 (1.3%)
> 7 weeks : 0 (0.0%)
> one year : 0 (0.0%)
https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025#Dimorphos #Didymos #AsteroidThreat #AsteroidDeflection #NASA #DART
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The research group estimates the #meteorite ☄️ crater's age to be a maximum of 10,000 years https://www.heise.de/en/news/Previously-overlooked-900-meter-meteorite-crater-discovered-in-southern-China-11082721.html
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The research group estimates the #meteorite ☄️ crater's age to be a maximum of 10,000 years https://www.heise.de/en/news/Previously-overlooked-900-meter-meteorite-crater-discovered-in-southern-China-11082721.html
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#2025SC79 is the second-fastest #asteroid ☄️, roughly 700 meters long, spotted on Sept. 27 hiding in the sun's ☀️ glare. "The most #dangerous asteroids are the most difficult to detect" 🔭 https://www.space.com/astronomy/asteroids/astronomers-discover-2nd-fastest-asteroid-in-the-solar-system-hiding-in-the-suns-glare
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#2025SC79 is the second-fastest #asteroid ☄️, roughly 700 meters long, spotted on Sept. 27 hiding in the sun's ☀️ glare. "The most #dangerous asteroids are the most difficult to detect" 🔭 https://www.space.com/astronomy/asteroids/astronomers-discover-2nd-fastest-asteroid-in-the-solar-system-hiding-in-the-suns-glare
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#Roman has the high sensitivity to measure the physical properties, compositions, and orbital trajectories of #NEOs ☄️ in order to understand their physical nature and potential #hazards to Earth. Roman's #PlanetaryDefense capabilities complement those of the operational ground-based @VRubinObs 🔭 and the upcoming #space-based 🌌 #NEOSurveyor https://arxiv.org/abs/2508.14412
🚀 October 2026 - May 2027 https://nextspaceflight.com/launches/details/6983
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#Roman has the high sensitivity to measure the physical properties, compositions, and orbital trajectories of #NEOs ☄️ in order to understand their physical nature and potential #hazards to Earth. Roman's #PlanetaryDefense capabilities complement those of the operational ground-based @VRubinObs 🔭 and the upcoming #space-based 🌌 #NEOSurveyor https://arxiv.org/abs/2508.14412
🚀 October 2026 - May 2027 https://nextspaceflight.com/launches/details/6983