{"paper":{"title":"The Gemini NICI Planet-Finding Campaign: The Orbit of the Young Exoplanet beta Pictoris b","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Andrew J. Skemer (5), Beth A. Biller (3), Chile (3) University of Edinburgh (4) Gemini Observatory, Chile (5) Steward Observatory, Christ Ftaclas (1), Douglas W. Toomey (7) ((1) Institute for Astronomy, Eric L. Nielsen (1), Jared R. Males (5), Katie M. Morzinski (5), Laird M. Close (5), Marc J. Kuchner (6), Mark Chun (1), Michael C. Liu (1), Philip M. Hinz (5), Thomas L. Hayward (4), Timothy J. Rodigas (5), University of Arizona (6) Goddard Space Flight Center (7) Mauna Kea Infrared), University of Hawaii (2) European Southern Observatory, Zahed Wahhaj (2)","submitted_at":"2014-03-27T20:00:00Z","abstract_excerpt":"We present new astrometry for the young (12--21 Myr) exoplanet beta Pictoris b taken with the Gemini/NICI and Magellan/MagAO instruments between 2009 and 2012. The high dynamic range of our observations allows us to measure the relative position of beta Pic b with respect to its primary star with greater accuracy than previous observations. Based on a Markov Chain Monte Carlo analysis, we find the planet has an orbital semi-major axis of 9.1 (+5.3, -0.5) AU and orbital eccentricity <0.15 at 68% confidence (with 95% confidence intervals of 8.2--48 AU and 0.00--0.82 for semi-major axis and eccen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.7195","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}