CelesTrak
CelesTrak is now a<br>501(c)(3) non-profit<br>and we need your help. CelesTrak's mission remains focused on making data<br>and other resources freely available to the space community to facilitate<br>understanding of our orbital environment and how to use it safely and<br>responsibly. We are committed to enhancing our current visualization tools and<br>upgrading SOCRATES to integrate with those tools. And we hope that many of you,<br>who share our passion, will be willing to make a small monthly donation to help<br>us achieve our vision. I look forward to continuing this journey together.<br>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<br>at<br>69999 not 99999,<br>which is estimated<br>to occur around 2026‑07‑12 (we're currently at 69847).<br>At that point, newly cataloged objects will have 6-digit catalog numbers of 100000+ and GP data will<br>not be available for them using the TLE format.<br>CelesTrak developed new formats that removed this<br>limitation (and finally fixed the Y2K problem) in May 2020 and immediately began providing GP data in those formats for software developers.<br>The same limitations apply to the legacy fixed-field SATCAT.<br>Follow @TSKelso on Bluesky for the latest updates, tutorials,<br>and changes as we approach this transition. Spread the word! ‑ TS
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DigitalArsenal's OrbUI [Beta]
Perpetually propagate the full public catalog on the fly at up to 30 fps!
Launch OrbUI
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Follow @TSKelso and @CelesTrak on Bluesky
NORAD GP Element Sets
Current Data (GP)
Supplemental Data (SupGP)
Special Data<br>Request (GP)<br>Documentation
CelesTrak Usage Policy<br>Special Data<br>Request (SupGP)
Library
Publications<br>Software Repository<br>Computers & Satellites Columns<br>NEW: Orbital Mechanics Software Tutorials<br>"Frequently Asked Questions: Two-Line Element Set Format"<br>"More Frequently Asked Questions"--><br>"A New Way to Obtain GP Data (aka TLEs)"<br>"How to Perform SupGP Queries"
Special Event Coverage<br>Artemis I & II Missions<br>Long March-5B Rocket Body (48275) Reentry of 2021 May 9<br>ORS-3 Launch of 2013 Nov 20<br>Dnepr Launch of 2013 Nov 21<br>Breeze-M Rocket Body (38746) Breakup<br>Iridium 33/Cosmos 2251 Collision<br>USA 193 Post-Shootdown Analysis<br>Chinese ASAT Test<br>2007 Debris Events
Online Satellite Catalog (SATCAT)
SATCAT<br>SATCAT Boxscore<br>Launch Boxscore
SOCRATES Plus<br>Satellite Orbital Conjunction Reports<br>Assessing threatening Encounters in Space
GPS Data
Status Messages<br>NANUs
SEM Almanacs<br>Yuma Almanacs
Space Data
Earth Orientation Parameters<br>Space Weather
CelesTrak: A Brief History<br>About the Webmaster