Abstract
Abstract The European Space Agency’s Solar Orbiter spacecraft will pass approximately downstream of the position of comet C/2019 Y4 (ATLAS) in late May and early June 2020. We predict that the spacecraft may encounter the comet’s ion tail around 2020 May 31—June 1, and that the comet’s dust tail may be crossed on 2020 June 6. We outline the solar wind features and dust grain collisions that the spacecraft’s instruments may detect when crossing the comet’s two tails. Solar Orbiter will also pass close to the orbital path of C/2020 F8 (SWAN) on 2020 May 22, but we believe that it is unlikely to detect any material associated with that comet.
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