Task 340: EP02 Jupiter→Saturn 87-Day Transit Duration Review
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Task 340: EP02 Jupiter→Saturn 87-Day Transit Duration Review
Status: DONE
Description
The 87-day Jupiter→Saturn transit still feels long narratively. The protagonists are NOT in cold sleep during this period. Investigate whether shorter transit scenarios are plausible.
Source
Human directive (AGENT_PROMPT.md phase 25): "木星 -> 土星への遷移87日はまだ長く感じる。主人公たちはコールドスリープしていない。"
Findings
Cold sleep correction
The EP02 report incorrectly implied きりたん was in cold sleep. In reality, only the guest (エスパー) is shown in cold sleep (Scene 6). きりたん appears awake throughout.
Physical lower bound
Extended two-phase analysis shows ~107 days (3d+3d) is the minimum capturable transit. Shorter asymmetric splits (5d+3d→57d, 7d+3d→42d) give uncapturable v∞ (>60 km/s).
Codex consultation
107 days without cold sleep is narratively acceptable in hard SF. "トリムのみ" constrains thrust level, not duration.
Changes
- Corrected cold sleep attribution in EP02 and cross-episode reports
- Added extended two-phase scenarios (5d+3d through 10d+10d) to ep02-analysis.ts
- Updated narrative pacing discussion, margin gauge, sensitivity summary
- +3 TDD tests, all 2239 pass