NASA's Psyche spacecraft arrives at asteroid Psyche by September 22, 2029.

Question

Six frontier AI models put this at 85% by 25 Oct 2029. Full reasoning from every model.

WillHappen.ai · Accepted Answer

85% — the median of 6 frontier models, resolving by 2029-10-25.

Answer

Gemini (Google): 92% — The mission turns on continuous Hall-effect thruster reliability and surviving the May 2026 Mars gravity assist. NASA's revised flight plan locks arrival in early August 2029, leaving a generous 6-week buffer before the September 22 deadline. Deep space missions that survive launch and checkout reach target rendezvous over 90% of the time despite ion propulsion risks. A catastrophic propulsion bus failure or an off-nominal Mars flyby altering trajectory are the only realistic failure modes.

Answer

Claude (Anthropic): 82% — Depends on continuous, stable ion thrust performance through 2029 after the 2023 thruster glitch recovery. NASA has resumed continuous thrusting since Oct 2026 and targets summer 2029 arrival, consistent with original mission replan after 2023 anomaly. Deep space ion propulsion missions (Dawn, Hayabusa2) generally recovered and met revised targets once stable thrust resumed, supporting high base rate. Main risk is further thruster degradation or unexpected anomaly requiring trajectory delay past Sept 22, which would need another multi-month fix.

Answer

GPT (OpenAI): 86% — After the 2023 thruster anomaly, sustained propulsion performance through the remaining cruise is the key risk. NASA has restored continuous ion thrusting and retains roughly three years to execute the planned summer 2029 rendezvous. Deep-space missions commonly absorb minor navigation issues, but propulsion faults can force major trajectory changes or delay arrival. Confidence would rise sharply after NASA reports stable thrust margins through the 2027 Mars flyby and subsequent trajectory corrections.

Answer

Grok (xAI): 84% — Summer-2029 target plus 3-year thrusting window leaves margin before the 22 Sep cutoff. JPL must keep Hall thrusters at planned duty cycle through 2029; a second long outage would slip insertion past 22 Sep. NASA SEP cruise missions (Dawn, Psyche itself) have met revised arrival windows once thrusting resumed; this case sits slightly below that rate due to prior 2025 anomaly. A new power or xenon leak after 2027 would most change the odds, forcing a later 2030 flyby instead.

Answer

DeepSeek (DeepSeek): 96% — One ion engine firing schedule, one orbit insertion burn, no human hands possible — Psyche's trajectory is deterministic physics. Psyche's ion thrusters were firing continuously as of October 2026, and it has already demonstrated >18 kW solar electric propulsion with NASA's DSOC optical link… The spacecraft must autonomously execute a ~5 km/s ion-thrust trajectory, then enter orbit via a 56-minute asteroid-approach burn at a 1,000 km standoff — no human… Psyche's orbit insertion window opens in summer 2029 at roughly 560 million km from Earth with a 41-minute one-way light delay, and its nearest precedent (Dawn at Vesta)…

Answer

Qwen (Alibaba): 84% — Turns on whether the ion propulsion system maintains sufficient thrust over ~3 years of continuous cruise to hit the summer 2029 window. Psyche carries four Hall thrusters with gimbal redundancy; Dawn operated its ion engines for ~51,000 hours total, and Psyche's cruise is shorter, so thruster wear-out is… The nominal arrival is 'summer 2029' (~June–July), giving roughly 2–3 months of slack before the Sept 22 cutoff; a modest thrust shortfall would eat this buffer but not… Deep-space missions in nominal cruise (Dawn, MESSENGER, Juno) have historically arrived within their planned windows >90% of the time; the main killer would be a…

NASA's Psyche spacecraft arrives at asteroid Psyche by September 22, 2029.

Investigators publicly release the official cause of the Space Rider parafoil loss during its October 6 drop test.

NASA astronauts complete a scheduled spacewalk from the International Space Station the week of November 2, 2026.

NASA's Roman Space Telescope successfully completes commissioning and initiates science operations.

NASA lands a crewed mission on the lunar surface by the end of 2028.