CelesTrak is now a 501(c)(3) non-profit and we need your help. CelesTrak's mission remains focused on making data and other resources freely available to the space community to facilitate understanding of our orbital environment and how to use it safely and responsibly. We are committed to enhancing our current visualization tools and upgrading SOCRATES to integrate with those tools. And we hope that many of you, who share our passion, will be willing to make a small monthly donation to help us achieve our vision. I look forward to continuing this journey together. We can't do it without you! Even as little as $1/year helps! ‑ T.S. Kelso

URGENT: We will run out of 5-digit catalog numbers at 69999 not 99999, which is estimated to occur around 2026‑07‑20 (we're currently at 68541). At that point, newly cataloged objects will have 6-digit catalog numbers of 100000+ and GP data will not be available for them using the TLE format. CelesTrak developed new formats that removed this limitation (and finally fixed the Y2K problem) in May 2020 and immediately began providing GP data in those formats for software developers. The same limitations apply to the legacy fixed-field SATCAT. Follow @TSKelso on Bluesky for the latest updates, tutorials, and changes as we approach this transition. Spread the word! ‑ TS