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We present photometry of the fragments, and perform simulations to infer the time of breakup. We argue that the eastern-most rapidly brightening fragment ($F4$) best corresponds to the original nucleus, rather than the initial bright fragment $F1$. We compute radial and tangential non-gravitational parameters, $A_1 = (1.5 \\pm 0.4) \\times 10^{-8}$ AU day$^{-2}$ and $(7.2 \\pm 1.9) \\times 10^{-9}$ AU day$^{-2}$; both are consistent with"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1602.07569","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-02-24T15:46:43Z","cross_cats_sorted":[],"title_canon_sha256":"7bdde6cafeaf6b98450ccffc3998e202ba28b078d339208b805f531a23d367e3","abstract_canon_sha256":"4cde4a3550c6000ba4c5fa17e07d29454122fef2ce303e263deeb60cac6b079b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:53.865573Z","signature_b64":"JoIkl5uYrCxjDQKrIhZ2pRLZSyO3tApDCf+xmaMtyt5sN4LTegqXerdFaFaKQOBWG5gT1EmiVX83z3BnArUwAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5dd870c1c39d7596d68e82f96eea2661bca856fa5f88a369cfa2c2fa4d18960","last_reissued_at":"2026-05-18T01:07:53.865025Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:53.865025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The catastrophic fragmentation of Comet 332P (Ikeya-Murakami)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Harold A. 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