"Such an intrinsically faint body could be discovered only thanks to the close Earth flyby in October 2017, which created a tremendous opportunity for the first

"Such an intrinsically faint body could be discovered only thanks to the close Earth flyby in October 2017, which created a tremendous opportunity for the first detailed characterization of a minor object of exosolar origin." https://arxiv.org/ftp/arxiv/papers/1712/1712.00437.pdf https://arxiv.org/ftp/arxiv/papers/1712/1712.00437.pdf