Led by my longtime friend [Sihao Cheng](https://sihaocheng.github.io/) (IAS), together with fellow grad student [Eritas Yang](https://web.astro.princeton.edu/people/eritas-yang) (Princeton), we discovered an exceptional trans-Neptunian object (TNO) named [2017 OF201](https://en.wikipedia.org/wiki/2017_OF201). It was first spotted in the [Dark Energy Camera](https://noirlab.edu/public/programs/ctio/victor-blanco-4m-telescope/decam/) data taken in 2017 as a part of the [Dark Energy Camera Legacy Survey (DECaLS)](https://www.legacysurvey.org/), and later confirmed by the archival data from the [Canada-France-Hawaii Telescope (CFHT)](https://www.legacysurvey.org/).
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