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European Southern Observatory
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2026-07-17latest coverage
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Science & Discovery
The asteroid that wasn't: 1998 SH2 outed as an active comet
A NASA/JPL-led study in Nature Astronomy has reclassified near-Earth object 1998 SH2 as an active comet — now P/1998 SH2 — after tiny outgassing-driven accelerations and a faint tail gave it away during a 2025 close pass.
