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Parker Solar Probe (PSP) aims at exploring the nascent solar wind close tothe Sun. Meanwhile, PSP is also expected to encounter small objects like cometsand asteroids. In this work, we survey the ephemerides to find a chance ofrecent encounter, and then model the interaction between released dusty plasmasand solar wind plasmas. On 2019 September 2, a comet-like object 322P/SOHO justpassed its perihelion flying to a heliocentric distance of 0.12 au, and sweptby PSP at a relative distance as close as 0.025 au. We present the dynamics ofdust particles released from 322P, forming a curved dust tail. Along the PSPpath in the simulated inner heliosphere, the states of plasma and magneticfield are sampled and illustrated, with the magnetic field sequences fromsimulation results being compared directly with the in-situ measurements fromPSP. Through comparison, we suggest that 322P might be at a deficient activitylevel releasing limited dusty plasmas during its way to becoming a "rockcomet". We also present images of solar wind streamers as recorded by WISPR,showing an indication of dust bombardment for the images superposed with messytrails. We observe from LASCO coronagraph that 322P was transiting from adimming region to a relatively bright streamer during its perihelion passage,and simulate to confirm that 322P was flying from relatively faster to slowersolar wind streams, modifying local plasma states of the streams.

Encounter of Parker Solar Probe and a Comet-like Object During Their Perihelia: Model Predictions and Measurements