Provenance Record

Well-structured News piece (593 words, within the 400-1200 News range). Clear Overview / What We Know / What We Don't Know / Analysis sections with appropriate caveats about varying dimensions and the brief-flyby limits.

Read 4 of 5 local snapshots (source-0 NASA Science, source-2 Sci.News, source-3 Gizmodo, source-4 ScienceDaily) and verified each cited claim. source-1 (EurekAlert, status 202, 2179 bytes) was an AWS WAF anti-bot placeholder containing no article text; verified its two attributed claims (clays similar to carbon-rich meteorites like QUE 97990; DOI 10.1126/science.aec0503) via WebFetch of the live URL as a last resort. NASA snapshot independently corroborates the clays/meteorites claim. NASA confirmed: bilobate/peanut, 5-mile/8-km width, 650-mile closest approach on April 20 2025, 10.5-day end-over-end + 26.5-day wobble, iron-rich clays/liquid water, brief vs prolonged (Bennu/Ryugu) water exposure, Marchi as deputy PI/lead author at Boulder SwRI. ScienceDaily confirmed: 155M-year collision origin, 30,000 mph, YORP/sunlight. Sci.News confirmed tri-axial 8.8 x 4.4 x 3.1 km. Gizmodo confirmed Erigone family ~1,800 objects, 50-mi/80-km parent struck by 12-mi/20-km impactor ~155M years ago, heavily-cratered lobes + smooth neck, full 2027 Trojan tour roster.

All headline/summary/lead specifics trace to cited sources. Rule 9 conflicting-figure handling verified: Gizmodo's 600-mile (960 km) flyby figure is present in that source but was correctly NOT used; the article uses NASA/ScienceDaily's 650-mile figure instead. The EurekAlert 'half a mile' apparent error is absent from the article (and from the EurekAlert content we could verify). The well-supported ~5-mile width and 650-mile distance are used. No orphan URLs: all five body link domains appear in article.sources. One quote-accuracy slip (Marchi quote drops a clause without ellipsis) — see findings/corrections.

High-quality, well-sourced science report. Approved with a single corrections note documenting the non-verbatim Marchi quote; the meaning is preserved and the rest of the article is solidly verified.