#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
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#asteroid
14 posts12 participants1 post 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."
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.
NASA/Goddard/SwRI/Johns Hopkins APL/NOIRLab
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
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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@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
Continued thread
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/17667/ ‘Earth Crosser’ Asteroid May Now Strike The Moon, Scientists Say #2024YR4 #Apophis #asteroid #Asteroid2024YR4 #AsteroidMainBelt #AsteroidOrigin #Asteroids #GeminiSouthTelescope #KeckObservatory #PlanetaryDefense #Science #Space #UK #UnitedKingdom
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
Scientists are learning more about the roughly 200-foot asteroid 2024 YR4, dubbed the "city killer."
@Futurism reports the asteroid is shaped like a saucer: https://flip.it/VyYm_b
Futurism · Space Object Is Shaped Like a Saucer, Scientists Find With Large Telescope
Shadow profile of slow-rotating asteroid (144) Vibilia measured by 6 stations in Poland and Germany on 2025 April 4. One additional observer reported a negative observation from the northern edge of the shadow.
https://cloud.occultwatcher.net/event/1554-144-149652-648999-U050651
The team of SODIS has calculated a preliminary profile of the asteroid of 134 x 134 km.
The dashed line shows the predicted centre line of the shadow. Another very accurate prediction.
Animation of #Asteroid #Flora approaching #NGC3628 the #HamburgerGalaxy in the #LeoTriplet 7th, 8th & 9th April 2025. Imaged from #Oxfordshire with a #WilliamOptics 70mm refractor + #Canon1100D Moonlight has been a real pain!