Not quite. You set up a plunging orbit and do a long burn at closest approach. The math/physics give you the biggest change in orbital energy. Slingshot requires no burn and is a three-body interaction.
Replies
Thanks. Sounds like that might have to be their fallback if indeed the main engine is out or fuel is low?
aug 2, 2025, 4:16 am • 1 0 • view
No, they need a working engine and Del V ~ 2.7 km/s to use the Oberth maneuver to leave Jupiter - it's not a fallback, but the heart of what they're proposing.
aug 2, 2025, 4:24 am • 3 0 • view
I meant if they can't do an Oberth
aug 2, 2025, 4:27 am • 1 0 • view
I think the best option is a small burn at Apojove to set up one or multiple flybys at Io/Europa/Ganymede that could then slingshot the spacecraft out to 3I/ATLAS! This could use as little as 200m/s of delta v, maybe even down to 100m/s if done properly, which is much more realistic and doable !
aug 2, 2025, 4:33 am • 2 0 • view
Chaotic orbits are your friend, but that takes patience and time you're not likely to have. And hygiene keeps you from trying close encounters with the icy moons with a dodgy propulsion system. Don't wanna smear Juno all over Europa.
aug 2, 2025, 4:43 am • 4 0 • view
I’m sure theres a trajectory using just Io or Io and Ganymede that’ll work. I’m just not sure how to calculate it! I can do the first Io encounter but after that I’ve just not got the programs
aug 2, 2025, 5:31 am • 1 0 • view
Yup. You want visits from black monoliths? Because that’s how you get visits from black monoliths.
aug 2, 2025, 6:40 am • 4 0 • view