Object 1998 SH2 Misidentified as Asteroid for 28 Years — It's Actually a Comet

The near-Earth object 1998 SH2, catalogued as an asteroid for 28 years, has been reclassified as a comet. Scientists have determined that its true nature was misidentified since its discovery, changing the understanding of its composition and behaviour. The reclassification highlights how difficult it can be to distinguish between asteroids and comets in early observations.