A team of Japanese astronomers and an amateur observer report that the distant Kuiper Belt object (612533) 2002 XV93 may have a thin atmosphere, hinting that very small, icy worlds beyond Neptune could retain atmospheres.

If the atmosphere fades in coming years, it would support an impact-origin explanation; if it persists or varies seasonally, it would imply an ongoing internal gas supply.

The object is about 500 kilometers in diameter and was observed in 2024 during a stellar occultation that caused a brief dip in starlight, used to infer the atmosphere.

The report appears in Nature Astronomy and remains preliminary pending independent verification.

The finding was published in Nature Astronomy, led by Ko Arimatsu with Junichi Watanabe as co-author.

The potential discovery feeds into debates about Pluto’s planetary status and NASA’s planetary science budget, illustrating how new results can influence classifications.

The object's current designation, 612533 2002 XV93, is considered unmemorable, with discussions of a future name inspired by Okinawan mythology under IAU rules.

Informally, the team has dubbed it XV93, but formal naming awaits IAU approval, with some members proposing an Okinawan-mythology-linked name.

Researchers noted the designation 612533 2002 XV93 is provisional for naming discussions following IAU procedures.

Independent verification is essential, with emphasis from leading scientists like Alan Stern on corroboration before firm conclusions are drawn.

Prominent scientists urge independent confirmation, underscoring the importance of validation before accepting the atmosphere finding.

The study appears in Nature Astronomy and adds to understanding of the solar system’s farthest, cold objects in the Kuiper Belt.