Better Know An Asteroid

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Sharing news and discoveries about asteroids, bringing an ongoing planetarium bit to social media
First light for the "Flyeye" wide-field asteroid telescope at Matera, sponsored by ESA: https://www.esa.int/Space_Safety/Planetary_Defence/ESA_s_new_asteroid_hunter_opens_its_eye_to_the_sky
ESA’s new asteroid hunter opens its eye to the sky

The European Space Agency’s (ESA) newest planetary defender has opened its ‘eye’ to the cosmos for the first time. The Flyeye telescope’s ‘first light’ marks the beginning of a new chapter in how we scan the skies for new near-Earth asteroids and comets.

Remember 2024 YR4, the asteroid that stole headlines as its Earth impact probability peaked around 3%? Well, it's now up to a 4% chance of hitting the Moon! #BetterKnowAnAsteroid
https://science.nasa.gov/blogs/planetary-defense/2025/06/05/nasas-webb-observations-update-asteroid-2024-yr4s-lunar-impact-odds/
NASA’s Webb Observations Update Asteroid 2024 YR4’s Lunar Impact Odds

While asteroid 2024 YR4 is currently too distant to detect with telescopes from Earth, NASA’s James Webb Space Telescope collected one more observation of the

NASA Science
Asteroids with ‘unstable orbits’ hide around Venus—do they threaten Earth? https://www.nationalgeographic.com/science/article/asteroids-venus-earth-danger-orbit
Asteroids with ‘unstable orbits’ hide around Venus—do they threaten Earth?

New research on the orbits of these mysterious asteroids near Venus stress the need for better space rock surveillance.

Psyche mission is back on track after switching fuel lines.

https://spacenews.com/nasa-switches-to-backup-propellant-line-on-psyche-spacecraft/

NASA switches to backup propellant line on Psyche spacecraft

NASA has decided to switch to a backup propellant line on its Psyche asteroid mission to allow the spacecraft to resume use of its electric thrusters.

SpaceNews
China is reportedly poised to launch Tianwen-2, a #BetterKnowAnAsteroid mission to visit and sample Kamo‘oalewa. This quasi-satellite of Earth might be a piece of ejecta from a lunar collision.
https://www.nasaspaceflight.com/2025/05/tianwen-2-launch/
China to launch the Tianwen-2 asteroid sample return mission - NASASpaceFlight.com

The Chinese space program is preparing to join the Japan Aerospace Exploration Agency (JAXA) and…

NASASpaceFlight.com
An updated look at the interior structure of Vesta. It may not have completely differentiated, leading to a more homogenous interior below its crust. #BetterKnowAnAsteroid
https://www.nature.com/articles/s41550-025-02533-7
A small core in Vesta inferred from Dawn’s observations - Nature Astronomy

A new analysis of Dawn’s observations reveals Vesta’s moment of inertia, indicating limited central density variation. This finding suggests that Vesta did not undergo full differentiation, challenging conventional models of Vesta’s formation and evolution.

Nature
First images from Lucy's encounter with Donaldjohanson are in, and they're definitely worth a look! #BetterKnowAnAsteroid
https://science.nasa.gov/image-article/nasas-lucy-spacecraft-images-asteroid-donaldjohanson/
NASA’s Lucy Spacecraft Images Asteroid Donaldjohanson

In its second asteroid encounter, NASA’s Lucy spacecraft obtained a close look at a uniquely shaped fragment of an asteroid that formed about 150 million

NASA Science
We're about 15 minutes from Lucy's closest approach to Donaldjohanson! #BetterKnowAnAsteroid
https://www.whereislucy.space/
We're some 37 hours from Lucy's encounter with the asteroid Donaldjohanson. Get ready to #BetterKnowAnAsteroid!
https://science.nasa.gov/blogs/lucy/2025/04/18/nasas-lucy-days-away-from-asteroid-encounter/
NASA’s Lucy Days Away from Asteroid Encounter - NASA Science

NASA’s Lucy spacecraft will soon reach the small main belt asteroid Donaldjohanson. In this image, created by stacking images that the Lucy spacecraft took during its approach, the asteroid appears as a series of points in front of the static background of stars and galaxies. In addition to the asteroid brightening as the spacecraft approaches...

NASA Science
NASA’s Lucy Spacecraft Prepares Second Asteroid Encounter - NASA

NASA’s Lucy spacecraft is 6 days and less than 50 million miles (80 million km) away from its second close encounter with an asteroid; this time, the small

NASA