A view of the orbits of Helios A & Helios B (aka Helios 1 & Helios 2) looking oblliquely from above the ecliptic plane.
In the days before Parker Solar Probe (PSP), the previous record-breaking spacecraft for speed and closest distance to the Sun were the two Helios probes, launched in the mid-1970s. Now with PSP re-entering the environment inward of the orbit of Mercury, data from these probes is being re-examined with newer tools and compared to the newer data.
Data Used: DE 431 JPL/Horizon Orbital Ephemerides
1974-12-10T23:51:00 to 1981-09-30T01:29:00
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.