Satellite categories
Beyond the mega-constellations (Starlink, OneWeb) and navigation fleets, 4,783 operational satellites do everything else in orbit. Here they are sorted by mission purpose — each category derived from how the object is classified in the public catalog, never guessed.
Communications
Satellites that relay voice, data, TV, and internet — from geostationary giants like Intelsat and SES to low-orbit fleets such as Orbcomm and Globalstar.
Earth Observation
Imaging and remote-sensing satellites that watch the planet — optical fleets like Planet’s Doves, radar imagers (ICEYE, Capella), and disaster-monitoring constellations.
Weather
Meteorological satellites that track storms, temperature, and climate — including the NOAA polar fleet and the GOES geostationary weather watchers.
Amateur Radio
Ham-radio satellites built and operated by volunteers and universities, carrying transponders that any licensed operator on Earth can use.
CubeSats & Tech Demos
Small experimental satellites — student CubeSats, engineering test articles, and technology demonstrators proving new hardware in orbit.
Military & Reconnaissance
Defense satellites catalogued under military feeds — early-warning, signals, and reconnaissance spacecraft (details are often limited by design).
Science & Relay
Research spacecraft and data-relay satellites — geodesy and physics missions, plus NASA’s TDRSS relay network that keeps other spacecraft in contact.
Other / Unclassified
Recently catalogued or uncorrelated objects whose mission isn’t yet pinned to a specific purpose in our sources. We’d rather leave these honest than guess.