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<div><i>High resolution optical spectroscopy of the N2-rich comet C/2016 R2 (PanSTARRS) </i> <a href="https://arxiv.org/abs/1901.00657" id="LPlnk383569">https://arxiv.org/abs/1901.00657</a></div>
<div><span>Says "In some ways, R2 is similar to comets 29P/Schwassmann-Wachmann and C/2002 VQ94 </span>(LINEAR), which are both distant active comets displaying clear
<div>N2+ and CO+ emission lines.</div>
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<div><i>Turning up the heat on `Oumuamua</i> <a href="https://arxiv.org/abs/1901.00508" id="LPNoLP711353">https://arxiv.org/abs/1901.00508</a><br>
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<div>Asks whether <span>known comets that </span>have passed close to the Sun could have been extra-solar in origin, but concludes none are particularly likely <span>to have been.</span></div>
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<div><span>Jeremy</span></div>
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