#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 -
#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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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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#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
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Most Venusian co-orbitals are nearly #invisible from Earth because they often remain in the #Sun’s glare ☀️. “While surveys like those from the #RubinObservatory 🔭 @VRubinObs may be able to detect some of these #asteroids ☄️ in the near future, we believe that only a dedicated observational campaign from a space-based 🌌 mission near #Venus could potentially map and discover all the still ‘invisible’ potentially #hazardous asteroids” https://dailygalaxy.com/2025/05/is-venus-hiding-a-deadly-threat-asteroids
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Most Venusian co-orbitals are nearly #invisible from Earth because they often remain in the #Sun’s glare ☀️. “While surveys like those from the #RubinObservatory 🔭 @VRubinObs may be able to detect some of these #asteroids ☄️ in the near future, we believe that only a dedicated observational campaign from a space-based 🌌 mission near #Venus could potentially map and discover all the still ‘invisible’ potentially #hazardous asteroids” https://dailygalaxy.com/2025/05/is-venus-hiding-a-deadly-threat-asteroids
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Richard Moissl, head of #ESA’s #PlanetaryDefence office, 54:00 : We have a blaringly obvious blind spot. Something like #Chelyabinsk ☄️💥 could happen any moment right now, we wouldn't have any prewarning https://www.youtube.com/watch?v=8njR4413hok
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Richard Moissl, head of #ESA’s #PlanetaryDefence office, 54:00 : We have a blaringly obvious blind spot. Something like #Chelyabinsk ☄️💥 could happen any moment right now, we wouldn't have any prewarning https://www.youtube.com/watch?v=8njR4413hok
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The warning time ⚠️ is unlikely to be more than a few months. Impacts 💥 from objects as small as 50 meters in diameter 📏, which are far more common, are historically extremely destructive regionally https://en.wikipedia.org/wiki/Asteroid_impact_avoidance#Deflection_efforts
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The warning time ⚠️ is unlikely to be more than a few months. Impacts 💥 from objects as small as 50 meters in diameter 📏, which are far more common, are historically extremely destructive regionally https://en.wikipedia.org/wiki/Asteroid_impact_avoidance#Deflection_efforts
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The warning time ⚠️ is unlikely to be more than a few months. Impacts 💥 from objects as small as 50 meters in diameter 📏, which are far more common, are historically extremely destructive regionally https://en.wikipedia.org/wiki/Asteroid_impact_avoidance#Deflection_efforts
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The warning time ⚠️ is unlikely to be more than a few months. Impacts 💥 from objects as small as 50 meters in diameter 📏, which are far more common, are historically extremely destructive regionally https://en.wikipedia.org/wiki/Asteroid_impact_avoidance#Deflection_efforts
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The warning time ⚠️ is unlikely to be more than a few months. Impacts 💥 from objects as small as 50 meters in diameter 📏, which are far more common, are historically extremely destructive regionally https://en.wikipedia.org/wiki/Asteroid_impact_avoidance#Deflection_efforts
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A single #HAMMER impactor (9-meter-tall, 8.8-ton) could deflect an object ☄️ 90 meters in diameter 📏 by around 1.4 Earth radii with 10 years of lead time – from the time of launch to anticipated Earth impact. If limited to #telescopic 🔭 observations, it’s possible that researchers may not be 100 percent certain of an #impact until less than a year before collision 💥. https://www.llnl.gov/article/44186/scientists-design-conceptual-asteroid-deflector-and-evaluate-it-against-massive-potential
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A single #HAMMER impactor (9-meter-tall, 8.8-ton) could deflect an object ☄️ 90 meters in diameter 📏 by around 1.4 Earth radii with 10 years of lead time – from the time of launch to anticipated Earth impact. If limited to #telescopic 🔭 observations, it’s possible that researchers may not be 100 percent certain of an #impact until less than a year before collision 💥. https://www.llnl.gov/article/44186/scientists-design-conceptual-asteroid-deflector-and-evaluate-it-against-massive-potential
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A single #HAMMER impactor (9-meter-tall, 8.8-ton) could deflect an object ☄️ 90 meters in diameter 📏 by around 1.4 Earth radii with 10 years of lead time – from the time of launch to anticipated Earth impact. If limited to #telescopic 🔭 observations, it’s possible that researchers may not be 100 percent certain of an #impact until less than a year before collision 💥. https://www.llnl.gov/article/44186/scientists-design-conceptual-asteroid-deflector-and-evaluate-it-against-massive-potential
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A single #HAMMER impactor (9-meter-tall, 8.8-ton) could deflect an object ☄️ 90 meters in diameter 📏 by around 1.4 Earth radii with 10 years of lead time – from the time of launch to anticipated Earth impact. If limited to #telescopic 🔭 observations, it’s possible that researchers may not be 100 percent certain of an #impact until less than a year before collision 💥. https://www.llnl.gov/article/44186/scientists-design-conceptual-asteroid-deflector-and-evaluate-it-against-massive-potential
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A single #HAMMER impactor (9-meter-tall, 8.8-ton) could deflect an object ☄️ 90 meters in diameter 📏 by around 1.4 Earth radii with 10 years of lead time – from the time of launch to anticipated Earth impact. If limited to #telescopic 🔭 observations, it’s possible that researchers may not be 100 percent certain of an #impact until less than a year before collision 💥. https://www.llnl.gov/article/44186/scientists-design-conceptual-asteroid-deflector-and-evaluate-it-against-massive-potential
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Three hours ⏱️ before impact, #asteroid ☄️ #2024BX1 was completely unknown 🙈 to #science. 70 minutes after the discovery, #NASA’s Scout system confirmed that the probability of impact 💥 with #Earth was 100%. 30 minutes after that, new data made it possible to specify the trajectory and size 📏 of the asteroid https://english.elpais.com/technology/2024-05-18/spacex-satellites-threaten-to-hide-asteroids-that-pose-danger-to-humanity.html
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Three hours ⏱️ before impact, #asteroid ☄️ #2024BX1 was completely unknown 🙈 to #science. 70 minutes after the discovery, #NASA’s Scout system confirmed that the probability of impact 💥 with #Earth was 100%. 30 minutes after that, new data made it possible to specify the trajectory and size 📏 of the asteroid https://english.elpais.com/technology/2024-05-18/spacex-satellites-threaten-to-hide-asteroids-that-pose-danger-to-humanity.html
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#HelioLinc3D spotted an #asteroid ☄️ that similar surveys had failed to see. It was specifically designed for the @VRubinObs in #Chile 🇨🇱. The #observatory’s huge mirror 📡, massive camera and expansive eye will see 👁️ pretty much everything in the night sky 🌌 in unprecedented detail https://www.nytimes.com/2023/08/05/science/space-asteroids-rubin-heliolinc3d.html
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#HelioLinc3D spotted an #asteroid ☄️ that similar surveys had failed to see. It was specifically designed for the @VRubinObs in #Chile 🇨🇱. The #observatory’s huge mirror 📡, massive camera and expansive eye will see 👁️ pretty much everything in the night sky 🌌 in unprecedented detail https://www.nytimes.com/2023/08/05/science/space-asteroids-rubin-heliolinc3d.html
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#Forbes 📆 Jul 16, 2023 The #ESA estimates there could be around a million near-earth #asteroids between 30 and 100 meters wide, and 98.9 percent of them remain undiscovered. New #asteroids ☄️ passing this close by #Earth are discovered every week, however #2023NT1 is among the largest seen in the past year. To get a sense of what a direct hit 💥 from an object this size might do, we have to reach back into history a bit, to the Pleistocene epoch 50,000 years ago, when a slightly smaller #asteroid formed the famed #MeteorCrater in #Arizona https://www.forbes.com/sites/ericmack/2023/07/16/hotel-sized-asteroid-undetected-until-two-days-after-close-pass-by-earth/
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#Forbes 📆 Jul 16, 2023 The #ESA estimates there could be around a million near-earth #asteroids between 30 and 100 meters wide, and 98.9 percent of them remain undiscovered. New #asteroids ☄️ passing this close by #Earth are discovered every week, however #2023NT1 is among the largest seen in the past year. To get a sense of what a direct hit 💥 from an object this size might do, we have to reach back into history a bit, to the Pleistocene epoch 50,000 years ago, when a slightly smaller #asteroid formed the famed #MeteorCrater in #Arizona https://www.forbes.com/sites/ericmack/2023/07/16/hotel-sized-asteroid-undetected-until-two-days-after-close-pass-by-earth/
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#HelioLinc3D found a near-Earth #asteroid ☄️ that older surveys had missed — one 600 feet long, the type that could devastate 💥 a large city 🏙️ . It was specifically designed for the #RubinObservatory in #Chile 🇨🇱. Telescopic 🔭 surveys have so far found more than 32,000 near- #Earth asteroids. Fainter asteroids ⚫ are mostly #undiscovered at present https://www.nytimes.com/2023/08/05/science/space-asteroids-rubin-heliolinc3d.html
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#HelioLinc3D found a near-Earth #asteroid ☄️ that older surveys had missed — one 600 feet long, the type that could devastate 💥 a large city 🏙️ . It was specifically designed for the #RubinObservatory in #Chile 🇨🇱. Telescopic 🔭 surveys have so far found more than 32,000 near- #Earth asteroids. Fainter asteroids ⚫ are mostly #undiscovered at present https://www.nytimes.com/2023/08/05/science/space-asteroids-rubin-heliolinc3d.html
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#UniversityOfWashington 📆 July 31, 2023 “This is just a small taste of what to expect with the #RubinObservatory in less than two years, when #HelioLinc3D will be discovering an object ☄️ like this every night." Any survey 🔭 will have difficulty discovering these faint 🌑 objects near its #sensitivity limit. https://www.washington.edu/news/2023/07/31/heliolinc3d/
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#UniversityOfWashington 📆 July 31, 2023 “This is just a small taste of what to expect with the #RubinObservatory in less than two years, when #HelioLinc3D will be discovering an object ☄️ like this every night." Any survey 🔭 will have difficulty discovering these faint 🌑 objects near its #sensitivity limit. https://www.washington.edu/news/2023/07/31/heliolinc3d/