#asteroidthreat — Public Fediverse posts

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/

#AsteroidThreat

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/

#AsteroidThreat

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

#RubinObservatory #AsteroidThreat

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

#RubinObservatory #AsteroidThreat

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

#Astronomy #AsteroidThreat #observatory #telescope

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

#Astronomy #AsteroidThreat #observatory #telescope

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

#AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

RE: https://spacey.space/@spaceflight/114542987454986475

#ESA #AsteroidThreat ☄️

RE: https://spacey.space/@spaceflight/114542987454986475

#ESA #AsteroidThreat ☄️

“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

#ESA #AsteroidThreat

“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

#ESA #AsteroidThreat

RE: https://spacey.space/@spaceflight/114160908203430596

#ESA #AsteroidThreat

RE: https://spacey.space/@spaceflight/114160908203430596

#ESA #AsteroidThreat

#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)

#NASA #ESA #AsteroidThreat #Astronomy

#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)

#NASA #ESA #AsteroidThreat #Astronomy

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

#AsteroidThreat #Houston

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

#AsteroidThreat #Houston

#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/

#BlueOrigin #AsteroidThreat

#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/

#BlueOrigin #AsteroidThreat

#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

#RubinObservatory #AsteroidThreat

#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

#RubinObservatory #AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

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

#DART #AsteroidDeflection #AsteroidThreat

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

#DART #AsteroidDeflection #AsteroidThreat

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

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

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

#AsteroidThreat

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

#AsteroidThreat

#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

#AsteroidThreat

#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

#AsteroidThreat

#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

#AsteroidThreat #SpaceTelescope #RomanSpaceTelescope

#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

#AsteroidThreat #SpaceTelescope #RomanSpaceTelescope

📊 #Asteroids ☄️ which came closer to Earth than the #Moon 🌙 in 2025 by time of discovery 🔭

• After closest approach: 94 (49.7%)
• < 24 hours before: 36 (19.0%)
• up to 7 days before: 57 (30.2%)
• > one week before: 2 (1.1%)
• > 7 weeks before: 0 (0.0%)
• > one year before: 0 (0.0%)

https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025

#AsteroidThreat

📊 #Asteroids ☄️ which came closer to Earth than the #Moon 🌙 in 2025 by time of discovery 🔭

• After closest approach: 94 (49.7%)
• < 24 hours before: 36 (19.0%)
• up to 7 days before: 57 (30.2%)
• > one week before: 2 (1.1%)
• > 7 weeks before: 0 (0.0%)
• > one year before: 0 (0.0%)

https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2025

#AsteroidThreat

When comparing the likelihood of #asteroid ☄️events to other possible events, some of the results might be surprising. For example, the chance of a >140 meter asteroid hitting 💥 Earth is more likely than an individual being struck by #lightning ⚡ in their lifetime https://phys.org/news/2025-08-lifetime-odds-dying-asteroid-impact.html

#AsteroidThreat

When comparing the likelihood of #asteroid ☄️events to other possible events, some of the results might be surprising. For example, the chance of a >140 meter asteroid hitting 💥 Earth is more likely than an individual being struck by #lightning ⚡ in their lifetime https://phys.org/news/2025-08-lifetime-odds-dying-asteroid-impact.html

#AsteroidThreat

“To be able to hear 👂 the sonic boom loudly from the ground suggests that quite a big chunk of the #meteor was pretty close to the ground. And that possibly means there’s chunks of the #meteorite ☄️ that actually made it down to the ground" https://www.independent.co.uk/space/meteor-explosion-sonic-boom-australia-houses-b2805229.html

#AsteroidThreat #Australia

“To be able to hear 👂 the sonic boom loudly from the ground suggests that quite a big chunk of the #meteor was pretty close to the ground. And that possibly means there’s chunks of the #meteorite ☄️ that actually made it down to the ground" https://www.independent.co.uk/space/meteor-explosion-sonic-boom-australia-houses-b2805229.html

#AsteroidThreat #Australia

“This is something that used to be expected once every few decades and not multiple times within 20 years”. Multiple fragments of that #meteorite ☄️ punched through the roof of a home just south of #Atlanta, dented laminate flooring and missed the man living there by 14 feet 📏 https://www.nytimes.com/2025/08/11/science/meteor-georgia-older-than-earth.html

#AsteroidThreat

“This is something that used to be expected once every few decades and not multiple times within 20 years”. Multiple fragments of that #meteorite ☄️ punched through the roof of a home just south of #Atlanta, dented laminate flooring and missed the man living there by 14 feet 📏 https://www.nytimes.com/2025/08/11/science/meteor-georgia-older-than-earth.html

#AsteroidThreat

Several dark comets – including the relatively large #2003RM – have been found in the near-Earth neighbourhood. These dark #comets ☄️ underwent bursts of #acceleration, enough to move off their orbits by hundreds of kilometres every few years. What lies behind their erratic movements remains a mystery. They do not show any signs of material being ejected from their surface https://www.bbc.com/future/article/20250807-a-japanese-spacecraft-is-racing-toward-a-mysterious-dark-comet-to-discover-the-secrets-it-holds

#AsteroidThreat

Several dark comets – including the relatively large #2003RM – have been found in the near-Earth neighbourhood. These dark #comets ☄️ underwent bursts of #acceleration, enough to move off their orbits by hundreds of kilometres every few years. What lies behind their erratic movements remains a mystery. They do not show any signs of material being ejected from their surface https://www.bbc.com/future/article/20250807-a-japanese-spacecraft-is-racing-toward-a-mysterious-dark-comet-to-discover-the-secrets-it-holds

#AsteroidThreat

📆 August 8, 2025 #'Meteorite ☄️ fragments struck a man's roof like a bullet and left a dent in the floor of the home outside #Atlanta https://abcnews.go.com/Technology/wireStory/fiery-meteor-punched-georgia-homes-roof-older-earth-124493520

#AsteroidThreat

📆 August 8, 2025 #'Meteorite ☄️ fragments struck a man's roof like a bullet and left a dent in the floor of the home outside #Atlanta https://abcnews.go.com/Technology/wireStory/fiery-meteor-punched-georgia-homes-roof-older-earth-124493520

#AsteroidThreat

According to #NASA, space rocks ☄️ measuring about one to 20 metres across collided with Earth’s atmosphere resulting in fireballs 🔥 556 times over 20 years. #Chelyabinsk is the best example. The types of #asteroids we should perhaps be most concerned about are those about 140 metres 📏 across https://www.theguardian.com/science/2025/jun/28/its-something-that-happens-are-we-doing-enough-to-save-earth-from-a-devastating-asteroid-strike

#AsteroidThreat

According to #NASA, space rocks ☄️ measuring about one to 20 metres across collided with Earth’s atmosphere resulting in fireballs 🔥 556 times over 20 years. #Chelyabinsk is the best example. The types of #asteroids we should perhaps be most concerned about are those about 140 metres 📏 across https://www.theguardian.com/science/2025/jun/28/its-something-that-happens-are-we-doing-enough-to-save-earth-from-a-devastating-asteroid-strike

#AsteroidThreat

The first step in averting an #asteroid ☄️ impact 💥 with Earth is just to know what near-Earth objects are out there 🔭. Plenty of city-killer asteroids remain lurking and undiscovered, potentially still posing a real risk to life on the planet. In the 50-meter range, a meager 7 percent 📊 of #NEOs have been found. @VRubinObs and #NEOSurveyor will locate an anticipated 90 percent of the entire population of objects 140 meters 📏 and larger https://spectrum.ieee.org/planetary-defense-killer-asteroids

#AsteroidThreat #Astronomy

The first step in averting an #asteroid ☄️ impact 💥 with Earth is just to know what near-Earth objects are out there 🔭. Plenty of city-killer asteroids remain lurking and undiscovered, potentially still posing a real risk to life on the planet. In the 50-meter range, a meager 7 percent 📊 of #NEOs have been found. @VRubinObs and #NEOSurveyor will locate an anticipated 90 percent of the entire population of objects 140 meters 📏 and larger https://spectrum.ieee.org/planetary-defense-killer-asteroids

#AsteroidThreat #Astronomy

While taking images of the distant #universe, @VRubinObs also discovered 2,104 #asteroids ☄️ flitting about in our own solar system—including seven whose orbits hew close to Earth’s own https://www.technologyreview.com/2025/06/23/1119129/first-images-vera-c-rubin-observatory

#Astronomy #AsteroidThreat

While taking images of the distant #universe, @VRubinObs also discovered 2,104 #asteroids ☄️ flitting about in our own solar system—including seven whose orbits hew close to Earth’s own https://www.technologyreview.com/2025/06/23/1119129/first-images-vera-c-rubin-observatory

#Astronomy #AsteroidThreat

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

#AsteroidThreat

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

#AsteroidThreat

It took 225 years ⏳ to find the 1.5 million #asteroids ☄️ known to date. The Vera C. Rubin Observatory 🔭 @VRubinObs will double this number in less than a year. ⏱️ https://www.heise.de/en/news/Simulation-New-telescope-soon-to-detect-millions-of-objects-in-the-solar-system-10425160.html

#Astronomy #AsteroidThreat

It took 225 years ⏳ to find the 1.5 million #asteroids ☄️ known to date. The Vera C. Rubin Observatory 🔭 @VRubinObs will double this number in less than a year. ⏱️ https://www.heise.de/en/news/Simulation-New-telescope-soon-to-detect-millions-of-objects-in-the-solar-system-10425160.html

#Astronomy #AsteroidThreat