« on: 15/09/2022 22:46:49 »
Quote from: OP
Parker Solar Probe's orbital period is similar to Mercury'sNASA planned the orbit of the Parker Probe so that it will periodically meet up with Venus.
- That means the aphelion is just outside the orbit of Venus (allowing 2 potential encounters)
- They ensure that the orbital period of the probe is a simple fraction of the orbital period of Venus (but this fraction changes on every encounter).
- This is so they can use a gravitational slingshot from Venus to reduce the perihelion of the Parker probe.
- It takes a huge delta-V to bring the orbit close to the Sun, and it is impractical to provide this much delta-V with chemical propellants
How does it affect its precession?It would be interesting if NASA used Einstein's corrections to Newton's equations in planning the orbit of this space probe.
- For trips to Mercury, Venus, the Moon and farther out, Newton's equations are fine.
- Einstein's corrections apply on the order of centuries, while the planned lifetime of this space probe is just 7 years
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