An impact of #asteroid #2024YR4 on the #Moon could be visible from Earth, if it impacts the side that faces us. Additional hazards not mentioned in articles I've seen so far would affect planning for #NASA #Artemis landing missions and Lunar Gateway space station (not yet launched). Some ejecta/debris from the impact would leave the Moon's weak gravity and could threaten Earth or our satellites weeks or months after impact. #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"Asteroid will miss Earth — but may set off lunar light show" by @cosmiclog / @alanboyle - #Asteroid #2024YR4 orbit is understood well enough now that it will not impact Earth in 2032. But it's still close. A lunar impact remains possible, currently at 3.8% probability. The article paints a picture of just a light show visible from Earth. But there are more potential hazards. https://cosmiclog.com/2025/04/07/asteroid-will-miss-earth-but-may-set-off-lunar-light-show/ #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"James Webb telescope takes emergency look at 'city-killer' asteroid 2024 YR4 ahead of close encounter in 2032" by @LiveScience - #NASA #JWST observations confirm #asteroid #2024YR4 will not impact Earth on the Dec 22, 2032 fly-by. An impact on the #Moon is still not ruled out. Another JWST observation is scheduled for May before the rock disappears into the dark outer solar system for several years. https://www.livescience.com/space/asteroids/james-webb-telescope-takes-emergency-look-at-city-killer-asteroid-2024-yr4-ahead-of-close-encounter-in-2032 #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"A Near-Miss with a City-Killer Asteroid Highlights Gaps in Earth’s Defenses" by @SciAm - Increasing capabilities to search for the next wayward #asteroid will mean recurring news like #2024YR4 where a threat is evaluated for potential collision course with Earth. At some point, we will find one headed here. Planning and test exercises try to become prepared for what to do when we know one is coming. https://www.scientificamerican.com/article/how-planetary-defenders-planned-to-stop-that-city-killer-asteroid/ #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"Asteroid 2024 YR4 is going to miss Earth, but the story doesn’t end there" by @arstechnica / @sciguyspace - The orbit of #Asteroid #2024YR4 has been narrowed down enough to know it will not hit Earth. Get used to more asteroids being evaluated as potential threats. The good news is that humanity is increasingly able to find these threats which were already out there. Don't be a dinosaur. https://arstechnica.com/space/2025/02/asteroid-2024-yr4-may-be-a-dud-but-we-will-soon-find-many-more-threats/ #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"You’re going to see more ‘city-killer’ asteroids, but fret not, MIT astronomer says" by KTLA Los Angeles - #Astedroid #2024YR4 is a useful example of what we're likely to see more often as astronomers get better equipment to locate rocks that have always been out there but previously passed unseen in the dark. Observation of an asteroid's orbit should look like this each time. https://ktla.com/news/nationworld/city-killer-asteroids-more-common/ #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

I don't see new news articles yet. But I checked the #NASA JPL data on #asteroid #2024YR4. It has been dropped on the Torino Scale of impact hazards from 1 to 0, previously at 3 when it was in the news. Now 1 in 26000 chance of impact in the 2032 pass. Still expected to go to zero. Dark skies under a waning moon allowed enough observations to narrow down its orbit before it's too far away from Earth to see for 3 years. #astronomy #PlanetaryDefense #PlanetaryDefence #LowFlyingRocks #space

"NASA massively lowers impact risk of 'city-killer' asteroid 2024 YR4 to 1 in 360" by @Spacecom / @RobertLea - #Asteroid #2024YR4 dropped from 3 to 1 on the Torino Scale of impact hazards. Telescope observations have narrowed down its orbit estimate, and chances of impact in 2032. As of Tuesday it was listed as 3.1%. It dropped to 0.28% as of Thursday when the article was written. (Minor update to 0.36% today.) It's expected to drop to zero. https://www.space.com/asteroid-2024yt4-impact-risk-drop-nasa #astronomy #LowFlyingRocks

"Chance of 'city-killer' asteroid 2024 YR4 smashing into Earth rises yet again to 3.1%, #NASA reports" by @LiveScience - As astronomers' observations have narrowed the estimate of #asteroid #2024YR4's orbit, Earth's size is now a larger fraction of the reduced cross-section of possible paths. So probability goes up until impact is ruled out. 96.9% chance the eventually-narrowed path will eliminate impact with Earth. Computation continues. https://www.livescience.com/space/asteroids/chance-of-city-killer-asteroid-2024-yr4-smashing-into-earth-rises-yet-again-to-3-1-percent-nasa-reports #astronomy #LowFlyingRocks

"Why asteroid 2024 YR4 is unlikely to hit Earth in 2032 and how scientists keep track" by @AssociatedPress - Scientists collecting telescope observations of 2024 YR4 to compute its orbit. As long as Earth is within the area of uncertainty in its path, there will be a small percentage chance of impact, Earth's size as a fraction of the cross section of possible paths. Impact chances will fluctuate, then probably be eliminated. https://apnews.com/article/asteroid-2024-yr4-earth-2032-5c353e2ee53bb1ecd68a562611d54062 #2024YR4 #asteroid #astronomy #LowFlyingRocks

"Incoming Asteroid" by XKCD comic (mirror bots @xkcd @xkcdbot ) - The smaller the asteroid/meteoroid, the more common it is. There are literally tons of incoming small meteors every day. The bigger they get, fortunately the less common. https://xkcd.com/3049/ #asteroid #astronomy #LowFlyingRocks #2024YR4

While @Leighton was driving, we both witnessed from #Melbourne a fireball meteor on January 28. Due to being on the road, we didn't have good enough direction info to make a report. I recall I looked at my watch and it was 2057 local time (AEDT), during local twilight. But apparently enough people had info to report and AMS eventually posted it. It had to be one of the longest-lasting meteors I've seen. https://fireball.amsmeteors.org/members/imo_view/event/2025/575 #asteroid #meteor #fireball #astronomy #LowFlyingRocks #Australia

"'Spectacular' asteroid blazes over Siberia just hours after it was detected" by @LiveScience - #Asteroid #C0WEPC5 became a routine monthly fireball. But detecting it before impact was a useful exercise for systems and processes looking for more hazardous #space rocks. https://www.livescience.com/space/asteroids/spectacular-asteroid-blazes-over-siberia-just-hours-after-it-was-detected #astronomy #LowFlyingRocks #bolide