03:23 <queqiao-> ⟨scimas⟩ I don't know about real life, but in KSP you can.. well, at least Reach can. Assuming you haven't seen this one before https://youtu.be/7BDxZV7UD9I?si=Qj1skIFEZInd1y_n

06:53 <queqiao-> ⟨raptop | ²³⁹Pu powered⟩ As best I'm aware, these sorts of trajectories do exist in real life, but usually you'd get stuck with enormous flight times

07:02 <queqiao-> ⟨raptop | ²³⁹Pu powered⟩ Just, uh, some of those periapses are concerningly close for bodies with atmospheres

07:09 <queqiao-> ⟨sichelgaita⟩ Which ones? 136 km for the Earth is a bit close but probably workable, no?

07:19 <queqiao-> ⟨sichelgaita⟩ I’ll add that I looked a bit at Reach’s flight plan while working on manœuvre optimization, and it’s exquisitely tuned. In real life you would definitely have to take relativity into account.

07:26 <queqiao-> ⟨raptop | ²³⁹Pu powered⟩ The 325 and 261 km ones for Venus also, but I could be making bad scale height related assumptions

07:32 <queqiao-> ⟨raptop | ²³⁹Pu powered⟩ It would be extremely funny if Mercury's perihelion being in the wrong position made it not work

18:40 <queqiao-> ⟨makoivis⟩ so I've been testing the optimization feature and as long as you try to optimize a maneuver taking place in ECI and have a reasonable starting point, it works great.

18:41 <queqiao-> ⟨makoivis⟩ if you change the maneuver frame, it seems to always crash

23:21 <queqiao-> ⟨butcher6994⟩ Venus atmosphere top is circa 150 km I thought

23:24 <queqiao-> ⟨lpg4999⟩ in ksp, yes (145). irl, not so much I think?

23:36 <raptop> I could be assuming that something like 8.5 km vs 15.8 km (give or take, values are from wikipedia) scale heights are important. Especially since temperatures get wacky in the upper parts of atmospheres

23:39 <queqiao-> ⟨lpg4999⟩ ( https://github.com/KSP-RO/RealSolarSystem/issues/216 , but also the comment at the bottom)

23:45 <queqiao-> ⟨Kirk (He/Him)⟩ Atmosphere thickness is generally not correlated with density

23:46 <queqiao-> ⟨Kirk (He/Him)⟩ For two planets of the same size with similar atmosphere composition, you would expect atmosphere "height" to be about the same. Earth and Venus are about the same size, and have atmospheres of similar composition, and so have a similar atmosphere "height"

23:52 <raptop> Unsure on that composition part, given 95-odd percent CO2 vs 78% N2 21% O2