Space-Track USSPACECOM catalog: 29,784 objects from full GP query.
Benchmark shows SP-GiST index reaches parity with seqscan at 30k:
- Delta: +1.6ms (14k) -> +0.9ms (20k) -> +0.0ms (30k)
- Planner voluntarily chooses Index Only Scan at this scale
- Zero heap fetches (all data served from index pages)
- 75.9% candidate pruning on 2h/10deg query
Archive includes TLEs from Space-Track, TLE API, and SatNOGS.
