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Important notice about STEREO Behind

Parker Solar Probe perihelion, 20 April 2021

This figure shows the orbital configuration of STEREO Ahead (red) during the perihelion passage of Parker Solar Probe (orange) centered on 20 April 2021. The positions of Parker Solar Probe are plotted at one day intervals during the period when it is within 0.25 AU of the Sun. The sense of motion is counter-clockwise. During this short period, the motions of STEREO and the planets are negligible in the Heliocentric Earth Ecliptic coordinate system which follows Earth's orbital period. At perihelion, the two spacecraft are close to being radially aligned.

Orbital plot

Note that the projected location of STEREO Behind is also plotted. However, that spacecraft is not currently operational. Follow this link for more information.

Also shown are the projected positions of Solar Orbiter (purple) based on a February 2020 launch date.

The following figures show the progression of Parker Solar Probe through the fields of view of the STEREO/SECCHI telescopes. The images are simulated, based on data from earlier in the STEREO mission.





Back to PSP support page.

Last Revised: Tuesday, 12-Feb-2019 19:33:46 GMT
Responsible NASA Official: [email address: Therese.A.Kucera<at>nasa<dot>gov]
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