20.02.2021 o 20:05 sonda wykonała czwartą asystę grawitacyjną przy Wenus, w odległości 2385 km od jej powierzchni.
http://lk.astronautilus.pl/sondy/spp.htmParker Solar Probe Primed for Fourth Venus FlybySarah Frazier Posted on February 19, 2021
At just after 3:05 p.m. EST, moving about 54,000 miles per hour (about 86,900 kilometers per hour), the spacecraft will pass 1,482 miles (2,385 kilometers) above Venus’ surface as it curves around the planet. (...)
This is the fourth of seven planned Venus gravity assists, and will set Parker Solar Probe up for its eighth and ninth close passes by the Sun, slated for April 29 and Aug. 9. During each of those passes, Parker Solar Probe will break its own record when it comes approximately 6.5 million miles (10.4 million kilometers) from the solar surface, about 1.9 million miles closer than the previous closest approach – or perihelion – of 8.4 million miles (13.5 million kilometers) on Jan. 17.
https://blogs.nasa.gov/parkersolarprobe/2021/02/19/parker-solar-probe-primed-for-fourth-venus-flyby/http://parkersolarprobe.jhuapl.edu/News-Center/Show-Article.php?articleID=159