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Table · dataset · 2024

DEEP. VI. 110 Trans-Neptunian Objects

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We present the first set of trans-Neptunian objects (TNOs) observed on multiple nights in data taken from the DECam Ecliptic Exploration Project.

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Of these 110 TNOs, 105 do not coincide with previously known TNOs and appear to be new discoveries. Each individual detection for our objects resulted from a digital tracking search at TNO rates of motion, using two-to-four-hour exposure sets, and the detections were subsequently linked across multiple observing seasons.

This procedure allows us to find objects with magnitudes mVR~26. The object discovery processing also included a comprehensive population of objects injected into the images, with a recovery and linking rate of at least 94%. The final orbits were obtained using a specialized orbit-fitting procedure that accounts for the positional errors derived from the digital tracking procedure.

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Our results include robust orbits and magnitudes for classical TNOs with absolute magnitudes H~10, as well as a dynamically detached object found at 76au (semimajor axis a~77au). We find a disagreement between our population of classical TNOs and the CFEPS-L7 three-component model for the Kuiper Belt.

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