CelesTrak

T. S. Kelso's service, begun as a bulletin board in 1985, that republishes the US military's satellite catalogue and orbital elements for the public; it is now a non-profit.

Explore it ↗ celestrak.org

builds on

• Satellite Catalog Number standard 1957 [src]
• Two-line element set standard 1980 [src]

founded by

• T. S. Kelso person [src]

Sources

• https://celestrak.org/brief-history.php
• https://en.wikipedia.org/wiki/Two-line_element_set