Parker Solar Probe: Close to the Sun
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ July 30, 2018
On the final three orbits, Parker Solar Probe will fly to within 3.9 million miles (6.2 million kilometers) of the Sun’s surface—more than seven times closer than the current record holder for a close solar pass, the Helios 2 spacecraft, which came within 27 million miles (43 million kilometers) in 1976.