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The Wagging Plasma Tail of Comet C/2020 S3 (Erasmus)

Jewitt, David; Li, Jing; Kim, Yoonyoung

Long-period comet C/2020 S3 (Erasmus) reached perihelion at 0.398 au on UT 2020 December 12.67, making it a bright, near-Sun object. Images taken between 2020 mid-November and December using the HI-1 camera and COR2 coronagraph on board STEREO-A, as well as the LASCO/C3 coronagraph on board SoHO, show significant variations in the plasma tail posi…