@olav and you think the #AsteroidThreat isn't that interesting ? 🤔

#Tunguska event* compared with #LosAngeles, #California. Prepared for #NASA by Stephen Paul Meszaros. https://commons.wikimedia.org/wiki/File:Tunguska_and_Los_Angeles_(4093217182).jpg

* https://en.wikipedia.org/wiki/Tunguska_event

#AsteroidThreat

#University of #California 📆 August 17, 2023 “The boulder swarm ☄️☄️☄️ is like a cloud of #shrapnel expanding from a hand grenade. Because those big boulders basically share the #speed of the targeted #asteroid, they’re capable of doing their own damage.” A 15-foot (5m) boulder hitting #Earth would deliver as much energy as the atomic bomb 💥 that was dropped on #Hiroshima https://www.universityofcalifornia.edu/news/planetary-defense-test-deflected-asteroid-unleashed-boulder-swarm

#DART #PlanetaryDefense #AsteroidThreat

Pictures : https://commons.wikimedia.org/wiki/File:Mars_Express_spies_an_ancient_triple_crater_on_Mars_ESA22287263.tiff https://commons.wikimedia.org/wiki/File:Crater_trio_ESA23421800.png

#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

#NEO #AsteroidThreat

#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/

#2022SF289 #AsteroidThreat

#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.

#2022SF289 #AsteroidThreat

📆 15 July 2023 An #asteroid 60 metres 📏 in size was an important reminder that truly dangerous #asteroids ☄️ could fly towards #Earth 🌍 – and that we might not spot 👀 them until they are too late. The #ESA estimates there could be a million asteroids in the same size range of 30 to 100 metres near Earth. And 98.9 per cent 📊 of them are still undiscovered 🔭, the #SpaceAgency says. https://www.independent.co.uk/space/asteroid-earth-moon-nasa-2023-nt1-b2376657.html

#AsteroidThreat

#ESA 📆 13/02/2023 7️⃣ Seventh #ShootingStar ever spotted 🔭 before it struck https://www.esa.int/ESA_Multimedia/Images/2023/02/Seventh_shooting_star_ever_spotted_before_it_struck

#AsteroidThreat

Pictures : https://neo.ssa.esa.int/gallery

#NASA 📆 2014 Every #day, Earth is bombarded with more than 100 tons of dust and sand-sized particles.

About once a year, an automobile-sized 🚗 #asteroid ☄️ hits Earth's atmosphere, creates an impressive fireball, and burns up before reaching the surface.

If a rocky #meteoroid larger than 25 meters but smaller than one kilometer were to hit #Earth 🌍, it would likely cause local #damage 💥 to the #impact area.

Anything larger than one to two kilometers 📏 could have #worldwide effects. https://www.nasa.gov/mission_pages/asteroids/overview/fastfacts.html

#AsteroidThreat

#Guardian 📆 26 Jan 2023 a delivery truck 🚚 -sized #asteroid ☄️ passed lower than communication #satellites 🛰️ . "One of the closest approaches by a #known #NEO ever #recorded”. First spotted 🔭 by an #amateur #astronomer https://www.theguardian.com/science/2023/jan/26/asteroid-2023-bu-about-to-pass-earth-in-one-of-closest-ever-encounters

#WashingtonPost 📆 October 24, 2022 "The bad news is #NASA estimates that it tracks only about 40 percent 📊 of the #asteroids ☄️#large enough that they could cause calamity if they were to hit 💥 #Earth" https://www.washingtonpost.com/technology/2022/10/24/nasa-asteroid-telescope

#AsteroidThreat

Picture : https://commons.wikimedia.org/wiki/File:Triple_asteroid_3122_Florence.gif

#Guardian 📆 26 Jan 2023 a delivery truck 🚚 -sized #asteroid ☄️ passed lower than communication #satellites 🛰️ . "One of the closest approaches by a #known #NEO ever #recorded”. First spotted 🔭 by an #amateur #astronomer https://www.theguardian.com/science/2023/jan/26/asteroid-2023-bu-about-to-pass-earth-in-one-of-closest-ever-encounters

#WashingtonPost 📆 October 24, 2022 "The bad news is #NASA estimates that it tracks only about 40 percent 📊 of the #asteroids ☄️#large enough that they could cause calamity if they were to hit 💥 #Earth" https://www.washingtonpost.com/technology/2022/10/24/nasa-asteroid-telescope

#AsteroidThreat

#AsteroidThreat https://youtu.be/H9IRFFncsc0

#ESA 📆 2018 #asteroid danger explained : 18% of the #Tunguska, 0,7% of the #Chelyabinsk size #meteors found https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained

Frequency and risk of an #impact 💥 event : https://en.wikipedia.org/wiki/Impact_event#Frequency_and_risk

#AsteroidThreat

📆 May 15, 2023 A #meteorite ☄️ crashed through the roof of a house 🏠 in #NewJersey. The meteorite struck the floor with such force that it rebounded and punched a second hole 🕳️ in the ceiling before landing back on the floor. https://skyandtelescope.org/astronomy-news/scientists-confirm-meteorite-crashed-into-new-jersey-home

#AsteroidThreat

#ESA 21/06/2018 "The main challenge stems from the population of middle-size objects ☄️, ranging from tens to #hundreds of meters in diameter ⛰️. There are a lot of these asteroids, and most have not been spotted yet." https://www.esa.int/ESA_Multimedia/Images/2018/06/Asteroid_danger_explained

#AsteroidThreat

⏱️ Time of discovery 🔭 of #asteroids ☄️ which passed within 1 #lunar distance from #Earth in 📆 2023

After closest approach 37.90%
< 24 hours before 20.70%
up to 7 days before 34.50%
> one week before 6.90%
> 7 weeks before 0.00%
> one year before 0.00%

List of #asteroid #close approaches to #Earth 🌏 in 📆 2023 https://en.wikipedia.org/wiki/List_of_asteroid_close_approaches_to_Earth_in_2023

#AsteroidThreat

Picture : :ccby: https://commons.wikimedia.org/wiki/File:2020_QG_flyby_spinview.gif

#WashingtonPost 📆 October 24, 2022 "The bad news is #NASA estimates that it tracks only about 40 percent of the #asteroids ☄️#large enough that they could cause calamity if they were to hit #Earth" https://www.washingtonpost.com/technology/2022/10/24/nasa-asteroid-telescope

#AsteroidThreat #asteroid #impact #prediction #meteorite

📆 28.04.2023 #Meteorite ☄️ the size of a tennis ball 🎾 hits house in Elmshorn 🇩🇪 https://newsingermany.com/small-meteorite-hits-house-in-elmshorn

#NASA next five #Asteroid approaches https://www.jpl.nasa.gov/asteroid-watch/next-five-approaches

#ESA risk list https://neo.ssa.esa.int/risk-list

#AsteroidThreat

#NEOs ☄️ and Policy (page 309, conclusion) : The first two chapters outlined the gradual realization that #Earth 🌍 and the #Moon 🌙 are inundated with impacting bodies and there exists a population of these bodies that orbit the #Sun ☀️ near the orbit of Earth. With the development of more and more sophisticated detectors 🔭, the known population of these near-Earth objects grew dramatically—all but erasing the reluctance of many to acknowledge the #impact risk 💥 that these objects present.

Free #eBook "A History of Near-Earth Objects" by @wikiarchives Research https://www.wikiarchives.space/picture.php?/755245/category/5225

#AsteroidThreat #AsteroidMining

RT @dlr_next
#NEO ☄️ #Earth 🌍 Close Approaches https://cneos.jpl.nasa.gov/ca

Note the size in km for two objects

#EasterEggs #AsteroidThreat

Picture : Small #asteroids and #comets visited by #spacecraft https://commons.wikimedia.org/wiki/File:Small_Asteroids_and_Comets_Visited_by_Spacecraft.jpg