authenticate and query the general perturbations (gp) catalog on space-track.org
domain: space-track.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Create a Space-Track.org account and log in via the site's authentication endpoint with account credentials to establish a session.
Build queries under /basicspacedata/query/class/gp/ with comma-delimited predicates, e.g. NORAD_CAT_ID/25544/format/json, plus an orderby clause.
Add decay_date/null-val/epoch/%3Enow-30/ to restrict results to currently propagable (on-orbit) objects, as Space-Track recommends for GP queries.
Choose an output format (json, xml, kvn, csv, html, tle) via /format/ in the query path.
Store and reuse the session rather than logging in on every request.
Known gotchas
Space-Track throttles to under 30 requests/minute and 300/hour; GP queries specifically should be made at most once per hour, staggered off the top/bottom of the hour.
Never script per-satellite one-by-one queries — combine multiple NORAD_CAT_IDs in a single comma-delimited request as required by the usage policy.
Legacy tle/tle_latest/tle_publish classes are being deprecated in favor of gp/gp_history; new integrations should target gp directly.
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