#KnowledgeByte: #Asteroid, #Meteroid, #Comet: How much do you know about the space objects? Can you tell the difference?
https://knowledgezone.co.in/posts/Asteroid-Meteroid-Comet-61652e0c325aafa6bf5a9d12
#asteroid
11 posts11 participants0 posts today
NASA’s Lucy spacecraft beams back pictures of an asteroid shaped like a lumpy bowling pin.
From @AssociatedPress: "Lucy passed within 600 miles (960 kilometers) of the harmless asteroid known as Donaldjohanson on Sunday in the main asteroid belt between Mars and Jupiter."
AP News · NASA's Lucy spacecraft beams back pictures of an asteroid shaped like a lumpy bowling pin
Die #Nasa-Raumsonde #Lucy ist auf ihrem langen Weg zu den Jupiter-Trojaner am Ostersonntag in einer Entfernung von etwa 960 km an dem Asteroiden #Donaldjohanson im Asteroidengürtel vorbei geflogen.
Donaldjohanson ist etwa 8 km lang und 3,5 km breit und ein Kontakt-Binärkörper. Dass heißt, dass der Asteroid aus zwei verschiedenen Körpern besteht, die sich zu einem verbunden haben.
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NASA’s Lucy Spacecraft Images Asteroid Donaldjohanson
https://science.nasa.gov/image-article/nasas-lucy-spacecraft-images-asteroid-donaldjohanson/
NASA Science · NASA’s Lucy Spacecraft Images Asteroid Donaldjohanson
A double scoop? Imagery from NASA's #Lucy spacecraft reveals that an #asteroid called #Donaldjohanson is a mooshed-together double space rock with a ridged structure in the middle that has been compared to a pair of nested ice cream cones. https://cosmiclog.com/2025/04/21/lucy-probe-snaps-closeup-of-weirdly-shaped-asteroid/ #Space #NASA
Cosmic Log · Lucy probe snaps closeup of weirdly shaped asteroidNASA’s Lucy spacecraft made a successful flyby of the second asteroid on its must-see list over the weekend, and sent back imagery documenting the elongated object’s bizarre double-lobe…
Meet Asteroid Donaldjohanson: Long and Lumpy
During a close flyby on April 20th, NASA’s Lucy spacecraft surprised its science team by revealing an asteroid that was once two smaller pieces that have been conjoined into a larger whole.
by Emily Lakdawalla for Sky and Telescope
https://skyandtelescope.org/astronomy-news/meet-asteroid-donaldjohanson/
Asteroids are just giant space peanuts.
I know you see it too.
Asteroid Donaldjohanson as captured by Long-Range Reconnaissance Imager (L’LORRI) on NASA’s Lucy spacecraft.
Replied in thread
@spacegeck The Potato asteroid is 4.8 km in diameter, which apparently is "mid-sized." Spacereference.org has a handy graphic that uses Mount Everest as a reference. #potato #asteroid #space
"Asteroid 2025 HH flew past Earth at 0.07 LD — third closest of the year" by The Watchers - Newly-discovered #Asteroid #2025HH passed 27,847km/17,304mi on April 17, and was discovered April 18. 
The Watchers · Asteroid 2025 HH flew past Earth at 0.07 LD — third closest of the year
But there are circumstances in which giving an #asteroid a physical shove might not be enough to protect the #planet. If that’s the case, we could need another method, one that is notoriously difficult to test in real life: a #nuclear explosion. https://www.technologyreview.com/2025/04/14/1114306/space-nuclear-explosion-asteroid-protection-research/?utm_source=the_download&utm_medium=email&utm_campaign=the_download.unpaid.engagement&utm_term=*%7CSUBCLASS%7C*&utm_content=*%7CDATE:m-d-Y%7C*
MIT Technology Review · Meet the researchers testing the “Armageddon” approach to asteroid defense
Protocol for an #Asteroid Strike, #China Overtaking #NASA, #Mining the #Moon | Q&A 312 - YouTube #SciComm #Science #Astronomy by #FraserCain
Journal for Occultation Astronomy 2025-02 is now available for free.
https://iota-es.de/JOA/joa2025_2.pdf
This issue:
Neglected double stars, lunar occultation observations - past, present and future, Beyond Jupiter, discoveries of asteroid satellites, invitation to ESOP 2025 and more.
Back issues: https://iota-es.de/joafree.html
Continued thread
#AstroForge CEO Matt Gialich isn’t surprised the startup failed to reach its destination on its first #asteroid mission #Odin in February: https://payloadspace.com/a-post-mission-debrief-with-astroforges-ceo/ - in fact, don’t be surprised if the next spacecraft, set to launch with Intuitive Machine’s IM-3 this fall, fails too.
Payload · A Post-Mission Debrief with AstroForge’s CEO“Will we actually land on an asteroid and get these beautiful samples? Probably f------ not,” Gialich told Payload. “But do we hope to change the name of the game for access to deep space, and show people that the price point we’re doing this at is doable? I hope.”
NASA doubles odds of Moon hitting Near-Earth Asteroid [2024 YR4].
"Experts at NASA’s Center for Near Earth Object Studies at the agency’s Jet Propulsion Laboratory have updated [2024 YR4]’s chance of impacting the Moon on December 22, 2032 from 1.7 to 3.8 percent," the agency said.
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#DLR:
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Raumsonde Lucy: Vorbeiflug am Asteroiden Donaldjohanson an Ostern
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"Die NASA-Raumsonde Lucy wird am 20. April 2025 den knapp vier Kilometer großen Asteroiden (52246) Donaldjohanson in 960 Kilometer Entfernung passieren. Generalprobe für die Untersuchung der „Trojaner“-Asteroiden auf der Jupiterbahn, die 2027/28 und nochmals 2033 erreicht werden. . .."
16.4.2025
www.dlr.deRaumsonde Lucy: Vorbeiflug am Asteroiden Donaldjohanson an OsternAm Ostersonntag wird die NASA-Raumsonde Lucy um 19.51 Uhr MESZ in knapp tausend Kilometer Entfernung am Asteroiden (52246) Donaldjohanson vorbeifliegen. Die Entfernung wurde sorgfältig gewählt, um bei der hohen Vorbeifluggeschwindigkeit scharfe, nicht verwischte Aufnahmen mit dem Kamerasystem L’LORRI aufzeichnen zu können. So werden sehr detailreiche Fotos mit Bildauflösungen von bis zu zehn Meter pro Pixel aufgenommen werden, die noch 50 Meter kleine Details zeigen. Donaldjohanson ist ein rund vier Kilometer großer Körper im Asteroiden-Hauptgürtel zwischen Mars und Jupiter. Das DLR ist an der Mission Lucy beteiligt und wird Aufnahmen und Messungen unmittelbar nach dem Vorbeiflug auswerten.
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@planet4589 : "When I was a kid 
, it was #LEO. Now, the frontier is out near the #asteroid belt, and the #Moon and #Mars are becoming part of where humanity just hangs out, maybe not yet as people, but with #robots. Meanwhile, #LEO is so normalized that it doesn’t take a #SpaceAgency to deal with it. You just call #SpaceX. Thousand years from now, perhaps more people live off Earth 
than on it" https://www.cearkadia.edu.pl/jonathan-mcdowell-on-retiring-from-harvard-and-leaving-the-u-s
cearkadia · Jonathan McDowell on Retiring From Harvard and Leaving the U.S. - cearkadiaJonathan McDowell is a go-to expert for all things spaceflight. Thousands of subscribers read his monthly Space Report, and far more people have seen him
Lucy Flyby of Asteroid Donaldjohanson Trajectory Visualizations 
#Animation #Asteroid #Dinosaur #Donaldjohanson #Exploration #Flyby #Lucy #Narrated
2 new pictures and 3 new videos from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=16&user=OptimusPrimeBot&ilshowall=1&offset=20250415125955
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A preview of the visit of #Asteroid #Donaldjohanson by #Lucy on 20 April: https://www.youtube.com/watch?v=OL9_0sagfBg <- https://www.nasa.gov/missions/lucy/nasas-lucy-spacecraft-prepares-second-asteroid-encounter/
A Pre-flyby View on the Origin of #Asteroid #Donaldjohanson, a Target of the NASA #Lucy Mission: https://iopscience.iop.org/article/10.3847/PSJ/adb4f4 -> interview with the first author: https://www.youtube.com/watch?v=rfmkEjoyesw
iopscience.iop.orgRadware Bot Manager Captcha
https://www.europesays.com/uk/14402/ NASA warns of an asteroid roughly the size of a 35-storey building zooming towards Earth: All details here #2023KUAsteroid #ApolloAsteroids #asteroid #Earth #Nasa #Science #UK #UnitedKingdom
