632 main-belt asteroids (178 known objects and 454 unknown objects) have been identified in archival images from the NASA/ESA Hubble Space Telescope. Citizen scientists from around the world contributed to the discovery of this asteroid. Professional astronomers identified the asteroid using a combination of volunteer efforts and machine learning algorithms.
This Hubble image of barred spiral galaxy UGC 12158 looks like someone took it with a white marking pen. In reality, this is a combination of long exposures of a foreground asteroid moving within Hubble's field of view, adding light bombardment to observations of the galaxy. The galaxy was photographed several times. The dashed pattern is proof of this. Due to parallax, the asteroid appears as a curved trajectory. Hubble is not stationary, but orbits around the Earth, giving the illusion of a faint asteroid swimming along a curved trajectory. This unknown asteroid is located inside the solar system's asteroid belt, so it is 10 trillion times closer to Hubble than the background galaxy. Image credits: NASA / ESA / Hubble / Pablo García Martín, UAM / Joseph DePasquale, STScI / Alex Filippenko, University of California, Berkeley.
More than 4 billion years ago, the eight major planets around the sun formed by sweeping up debris from the vast disk of dust and gas surrounding the sun.
This is common in the birth process of planets, and the NASA/ESA Hubble Space Telescope has for the first time optically observed a similar disk surrounding a newborn star, providing a glimpse into the solar system's formative years.
Four billion years later, debris still litters the planet's construction yards.
Most of this ancient space debris, or asteroids, lies between the orbits of Mars and Jupiter within the main asteroid belt.
“We are starting to learn more about the presence of a small number of main-belt asteroids,” said Dr. Pablo García Martín, an astronomer at the Autonomous University of Madrid.
“We were surprised to see so many candidate objects.”
“We've had some hints that this population exists, but we're now confirming it with a random asteroid population sample obtained using the entire Hubble archive.”
“This is important for gaining insight into models of the evolution of the solar system.”
Since Hubble orbits around the Earth at high speed, Hubble exposure allows us to follow its trail and capture a wandering asteroid.
When viewed from a telescope on Earth, the asteroid leaves streaks across the photo.
The asteroid appears as an unmistakable curved trajectory in the photo, making the Hubble exposure a “photobomb.”
Hubble observes the asteroid from different perspectives as it moves around Earth, but the asteroid also moves along its own orbit.
By knowing Hubble's position during observations and measuring the curvature of its stripes, scientists can determine the distance to the asteroid and estimate the shape of its orbit.
Most of the asteroids involved are in the main belt between the orbits of Mars and Jupiter.
Their brightness is measured by Hubble's sensitive camera. Then, by comparing its brightness and distance, we can estimate its size.
The faintest asteroid found in the survey is approximately 40 million times less bright than the faintest star visible to the human eye.
“Because the asteroid's position changes over time, you can't find the asteroid's location just by entering the coordinates, because the asteroid may not be there at a different time,” Melin said.
“As astronomers, we don't have time to study images of every asteroid.”
“So we came up with the idea of collaborating with more than 10,000 citizen science volunteers to browse the massive Hubble archive.”
of result appear in the diary astronomy and astrophysics.
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Pablo Garcia-Martin other. 2024. Hubble Asteroid Hunter III. Physical properties of newly discovered asteroids. A&A 683, A122; doi: 10.1051/0004-6361/202346771
Source: www.sci.news
