[tga_d]

It's not that the headline is "more accurate" than the story, it's that the headline is accurate and reflects the content of the article. If you look at the second paragraph of the article, as well as the source it provides[0], they all agree the "asteroid" was deleted from records: "EDITORIAL NOTICE: DELETION OF 2018 CN41". It was not reclassified or corrected, it was deleted, because it was not an asteroid and so does not belong in the list of designated asteroids. It just also happens to already be tracked elsewhere.

[0] https://minorplanetcenter.net/mpec/K25/K25A49.html

[rendaw]

I'll bite, that sounds like a correction to me.

[tga_d]

Maybe in the broadest sense, but it's certainly not more accurate to say that. If I hold a fiction writing competition, and you submit a piece of non-fiction that I throw in a paper shredder, I think most would agree that I would be misleading if I said I "corrected" your writing. "Deleted" would be a better description, regardless of whether the same work had been submitted elsewhere before.