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We find significant temporal variations of the color slope, ranging from -12.67 $\\pm$ 8.16 \\% per 0.1~$\\mu$m up to $35.09 \\pm 11.7$ \\% per 0.1~$\\mu$m.It is significant that the comet changes color from red to blue over only a two-day period. Such dispersion cannot be characterized with an average color slope. We also observe Comet C/2013 UQ4 (Catalina) in infrared using Spitzer and find no significant CO/CO$_{2}$ gaseous species in its coma. Therefore, we classify Comet C/2013 U"},"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":"1706.01228","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-06-05T07:55:12Z","cross_cats_sorted":[],"title_canon_sha256":"ac53429ad689b02fa0f1ca87cec8712c55d5672bb3bca7976649be70de7080bb","abstract_canon_sha256":"9d5c023efc285d9f86b731013dc4e72ae84d8cfda174b200cc369948cdf3bd2e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:04.107385Z","signature_b64":"VZeDPyprdm3xfGGwz7qLWVkTYekoyD3iMTegCZ7HK2LkbvtN+IQjNQfOx8R8md0gtMoLz3ZWTcL/gssLX5UUCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6757946b74ce59d835da6dfb01d279ac85d346f21a24a182a3edc47c96bb878","last_reissued_at":"2026-05-18T00:43:04.106704Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:04.106704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Color variations of Comet C/2013 UQ4 (Catalina)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Artyom Novichonok, Evgenij Zubko, Gorden Videen, J\\'an Svore\\v{n}, Joseph L. Hora, Michael Mommert, Oleksandra Ivanova, Olena Shubina, Serhii Borysenko, Zuzana Seman Kri\\v{s}andov\\'a","submitted_at":"2017-06-05T07:55:12Z","abstract_excerpt":"We report observations of color in the inner coma of Comet C/2013 UQ4 (Catalina) with the broadband B and R filters. We find significant temporal variations of the color slope, ranging from -12.67 $\\pm$ 8.16 \\% per 0.1~$\\mu$m up to $35.09 \\pm 11.7$ \\% per 0.1~$\\mu$m.It is significant that the comet changes color from red to blue over only a two-day period. Such dispersion cannot be characterized with an average color slope. We also observe Comet C/2013 UQ4 (Catalina) in infrared using Spitzer and find no significant CO/CO$_{2}$ gaseous species in its coma. 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