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In this paper, we present new VLTI\/GRAVITY astrometric data of HIP 65426 b, a cold, giant exoplanet which is a particular challenge for most formation theories at a projected separation of 92 au from its primary. Leveraging GRAVITY\u2019s astrometric precision, we present an updated eccentricity posterior that disfavors large eccentricities. The eccentricity posterior is still prior dependent, and we extensively interpret and discuss the limits of the posterior constraints presented here. We also perform updated spectral comparisons with self-consistent forward-modeled spectra, finding a best-fit <jats:monospace>ExoREM<\/jats:monospace> model with solar metallicity and C\/O = 0.6. An important caveat is that it is difficult to estimate robust errors on these values, which are subject to interpolation errors as well as potentially missing model physics. Taken together, the orbital and atmospheric constraints paint a preliminary picture of formation inconsistent with scattering after disk dispersal. Further work is needed to validate this interpretation. Analysis code used to perform this work is available on GitHub: <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/github.com\/sblunt\/hip65426\" xlink:type=\"simple\">https:\/\/github.com\/sblunt\/hip65426<\/jats:ext-link>.<\/jats:p>","DOI":"10.3847\/1538-3881\/ad06b7","type":"journal-article","created":{"date-parts":[[2023,11,21]],"date-time":"2023-11-21T16:56:30Z","timestamp":1700585790000},"page":"257","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":15,"title":["First VLTI\/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity"],"prefix":"10.3847","volume":"166","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3199-2888","authenticated-orcid":true,"given":"Sarah","family":"Blunt","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6396-8439","authenticated-orcid":true,"given":"W. 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