AI algorithm discovers 'potentially hazardous' asteroid 600 feet wide in a 1st for astronomy -...
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AI algorithm discovers 'potentially hazardous' asteroid 600 feet wide in a 1st for astronomy - Space.com
News Science Astronomy AI has just found its first potentially Earth-threatening space rock.
(Image credit: ATLAS/University of Hawaii Institute for Astronomy/NASA) A new artificial intelligence algorithm programmed to hunt for potentially dangerous near-Earth asteroids has discovered its first space rock. The roughly 600-foot-wide (180 meters) asteroid has received the designation 2022 SF289, and is expected to approach Earth to within 140,000 miles (225,000 kilometers). That distance is shorter than that between our planet and the moon, which are on average, 238,855 miles (384,400 km) apart. This is close enough to define the rock as a Potentially Hazardous Asteroid (PHA), but that doesn't mean it will impact Earth in the foreseeable future. The HelioLinc3D program, which found the asteroid, has been developed to help the Vera C. Rubin Observatory, currently under construction in Northern Chile, conduct its upcoming 10-year survey of the night sky by searching for space rocks in Earth's near vicinity. As such, the algorithm could be vital in giving scientists the heads up about space rocks on a collision course with Earth. "By demonstrating the real-world effectiveness of the software that Rubin will use to look for thousands of yet-unknown potentially hazardous asteroids, the discovery of 2022 SF289 makes us all safer," Vera C. Rubin researcher Ari Heinze said in a statement. Related: Super-close supernova captivates record number of citizen scientists Tens of millions of space rocks roam the solar system ranging from asteroids the size of a few feet to dwarf planets around the size of the moon. These space rocks are the remains of material that initially formed the planets around 4.5 billion years ago. While most of these objects are located far from Earth, with the majority of asteroids homed in the main asteroid belt between Mars and Jupiter, some have orbits that bring them close to Earth. Sometimes worryingly close. Space rocks that come close to Earth are defined as near-Earth objects (NEOs), and asteroids that venture to within around 5 million miles of the planet get the Potentially Hazardous Asteroid (PHA) status. This doesn't mean that they will impact the planet, though. Just as is the case with 2022 SF289, no currently known PHA poses an impact risk for at least the next 100 years. Astronomers search for potentially hazardous asteroids and monitor their orbits just to make sure they are not heading for a collision with the planet. This new PHA was found when the asteroid-hunting algorithm was paired with data from the ATLAS survey in Hawaii, as a test of its efficiency before Rubin is completed. The discovery of 2022 SF289 has shown that HelioLinc3D can spot asteroids with fewer observations than current space rock hunting techniques allow. Rubin is ready to join the potentially hazardous asteroid hunt Searching for potentially hazardous asteroids involves taking images of parts of the sky at least four times a night. When astronomers spot a moving point of light traveling in an unambiguous straight line across the series of images, they can be quite certain they have found an asteroid. Further observations are then made to better constrain the orbit of these space rocks around the sun. The new algorithm, however, can make a detection from just two images, speeding up the whole process. Around 2,350 PHAs have been discovered thus far, and though none poses a threat of hitting Earth in the near future, astronomers aren't quite ready to relax just yet as they know that many more potentially dangerous space rocks are out there yet to be uncovered. It is estimated that the Vera Rubin Observatory could uncover as many as 3,000 hitherto undiscovered potentially hazardous asteroids. The Vera C. Rubin Observatory as it takes shape in northern Chile ready to hunt potential hazardous asteroids (Image credit: Rubin Obs/NSF/AURA) Rubin's 27-foot-wide (8.4 meters) mirror and massive 3,200-megapixel camera will revisit locations in the night sky twice per night rather than the four times a night observations conducted by current telescopes. Hence the creation of HelioLinc3D, a code that could find asteroids in Rubin’s dataset even with fewer available observations. But, the algorithm's creators...
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