Saturn encounter may have set distant centaur on path to becoming a comet
More than 3 billion miles (4.8 billion kilometers) from Earth, an ancient icy object is slowly awakening. As it drifts inward through the solar system, the frozen body known as Centaur 450P/LONEOS has begun releasing gas and dust—behavior more commonly associated with comets than with centaurs, the small icy objects that typically orbit between Jupiter and Neptune.
Recent observations of Centaur 450P/LONEOS, an icy object located more than 3 billion miles from Earth, suggest that it may be undergoing a transformation from a centaur to a comet. After a gravitational encounter with Saturn in 1992, the object began to release gas and dust, behaviors typically associated with comets. Using data from NASA's James Webb Space Telescope and the Gemini North telescope, researchers detected carbon dioxide gas, icy dust, and signs of recent thermal activity surrounding the centaur.
This discovery could provide new insights into how distant icy bodies evolve into active comets as they migrate inward through the solar system. Centaurs are scientifically important as transitional objects that originated farther out in the solar system and are slowly evolving toward becoming Jupiter-family comets, offering a way to study primitive material from the outer solar system as it responds to stronger solar heating.
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