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We measured the radial velocities in the optical spectrum of HD 74194, and we determined the orbital solution for the first time. We also analysed the complex H{\\alpha} profile. Results. HD 74194 is a binary system composed of an O-type supergiant and a compact object in a short-period ($P=9.5436\\pm0.0002$ d) and high-eccentricity ($e=0.63\\pm0.03$) orbit. The equivalent width of the H{\\alpha} line is not modulated"},"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":"1510.06584","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-10-22T11:54:25Z","cross_cats_sorted":[],"title_canon_sha256":"482b43ebbd0120334c7d4928655b60e3f3107f466a88a1240f89bfaa935ebc44","abstract_canon_sha256":"386143d05cf467093fae340bb0ac0468f9c14978d314a47fe77f82faaa77d019"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:56.497229Z","signature_b64":"Oa8vQx0np6hGPwW+QxWkiHNntZcivJ1pZM9Ei3Tt/qVA6lPeeD6IUgSkMqqB7+2DvrBmTmQ6AkNBBgZEimcCCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36548c0a48b0f78b119f991f3b013f5cf3c8a510836b86b70e5143d60ee2a393","last_reissued_at":"2026-05-18T01:27:56.496503Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:56.496503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The eccentric short-period orbit of the supergiant fast X-ray transient HD 74194 (=LM Vel)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Sota, E. J. Alfaro, J. I. Arias, J. Ma\\'iz Apell\\'aniz, N. I. Morrell, N. R. Walborn, R. Gamen, R. H. Barb\\'a","submitted_at":"2015-10-22T11:54:25Z","abstract_excerpt":"Aims. We present the first orbital solution for the O-type supergiant star HD 74194, which is the optical counterpart of the supergiant fast X-ray transient IGR J08408-4503. Methods. We measured the radial velocities in the optical spectrum of HD 74194, and we determined the orbital solution for the first time. We also analysed the complex H{\\alpha} profile. Results. HD 74194 is a binary system composed of an O-type supergiant and a compact object in a short-period ($P=9.5436\\pm0.0002$ d) and high-eccentricity ($e=0.63\\pm0.03$) orbit. 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