Provenance Record

Well-structured News piece (720 words, within the 400-1200 News range). Clear sectioning (Overview / What We Know / The Sampling Plan / The Origin Question / What We Don't Know / Analysis), neutral and precise. Framing correctly centers on the NEW arrival event — the weekend rendezvous engine burn and the start of the survey/sampling phase — rather than re-treading the June 3 origin study, which is relegated to secondary context.

All five sources personally verified against snapshots (or live for the bot-blocked source). source-0 (Scientific American): all direct quotes verbatim — 'quietly performed a crucial engine burn', 'mysterious tiny world in a quasi-Earth orbit', 'Over the next four weeks...lining up future sampling attempts', 'between about 40 to 100 meters...rotates once every 28 minutes', 'three available sampling methods — touch and go, hover, and anchor and attach', 'complete its sampling and depart from Kamo'oalewa next April...brief reunion with Earth in November 2027', 'slingshot itself on course to visit Comet 311P', 'arriving in 2035', and the Patrick Michel quote 'Every new image of an asteroid has been a surprise. We have everything to learn.' (correctly attributed to Michel via Scientific American). source-1 (Wikipedia Tianwen-2): Long March 3B, Xichang, 28 May 2025 launch; orbital insertion 7 June 2026; close approach within 20 km on July 4; both anchor-and-attach and touch-and-go, first anchor-and-attach on an asteroid; orbital departure 24 April 2027; Comet 311P / 2035 — all confirmed. CRITICAL sample-mass check: Wikipedia infobox reads 'Sample mass ≥100 g' and body 'collect a sample of 100 g of regolith' — the article uses only the official 'at least 100 grams' figure and does NOT assert the disputed 200–1,000 grams. source-2 (China in Space): 'regularly communicate with Earth and is possibly preparing to perform an arrival burn' verbatim; rendezvous around June 7. source-3 (Kamo'oalewa Wikipedia): discovered by Pan-STARRS at Haleakala Observatory on 27 April 2016, designation 2016 HO3, 'second-smallest, closest, and most stable known such quasi-satellite' verbatim. source-4 (phys.org): snapshot failed (HTTP 403 bot-block, file null in manifest); verified live via WebFetch — quotes (1) and (3) verbatim, quote (2) trimmed (see concerns).

All headline, summary, and lead claims trace to cited sources. Internal cross-reference to the June 3 article (/article/2026-06/03-new-study-challenges-the-lunar-origin-theory-of-kamooalewa-as-chinas-tianwen-2-probe-nears-the-quasi-moon-asteroid) resolves to an existing published article. Two minor quote-fidelity issues in subordinate body claims, documented in the corrections record; neither affects the headline, summary, or lead.

APPROVE_WITH_CORRECTIONS. Substantively strong, accurate, neutral follow-up centered on the new arrival event with a resolving internal cross-reference and correct use of the official sample-mass figure. Two minor, honestly-summarizable quote-fidelity issues in subordinate body claims warrant a public corrections record rather than rejection; the headline, summary, and lead are fully sourced and no fabrication pattern exists.