arcsecond.io
Science & Math
Multiple astronomy data sources
No keyCORSHTTPS
CelesTrak GP Data
CelesTrak provides access to General Perturbations (GP) orbital data, including Two-Line Element Sets (TLEs) and newer formats like XML and JSON. This data is crucial for tracking objects in space and supports various queries to retrieve specific orbital information based on catalog numbers, designators, and names.
Verified 4 days ago: 97% uptime
API key
Unconfirmed
HTTPS
Supported
Browser calls
Yes, CORS enabled
Status
Live · 91/100
What our checks found
- Health score
- 91/100
- Reliability
- 97%
- Average latency
- 1079ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for CelesTrak GP Data. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Authentication requirement is unconfirmed. Check the documentation before relying on this.
curl -s "https://celestrak.org/ENDPOINT" \
-H "Authorization: Bearer YOUR_TOKEN" \
-H "Accept: application/json"Where this listing comes from
Aggregated from one public source (freepublicapis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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CelesTrak GP Data — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is CelesTrak GP Data free to use?
CelesTrak GP Data is listed in our free catalogue, but it requires some form of authentication, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does CelesTrak GP Data need an API key?
CelesTrak GP Data requires some form of authentication. Check the provider's documentation for which scheme it expects.
Can I call CelesTrak GP Data from browser JavaScript?
Yes. CelesTrak GP Data returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.
Is CelesTrak GP Data still working?
Yes, as of 2026-09-18. Our automated check reached CelesTrak GP Data and recorded a 97% reliability score with a median response time of 1079 ms. We re-check on a schedule, and this page updates with the result.
Is CelesTrak GP Data available over HTTPS?
Yes. CelesTrak GP Data serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.