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Understanding the Heavens: The Union of Concerned Scientists Satellite Database

play a pivotal role in modern life. They support critical services, from weather forecasting and global communications, to scientific and national security. Keeping track of these space-borne assets is an enormous undertaking. One organization helping us understand the satellite ecosystem is the Union of Concerned Scientists (UCS), with their UCS Satellite Database.

What is the UCS Satellite Database?

The Union of Concerned Scientists Satellite Database is a comprehensive collection of active satellites that are currently orbiting the Earth. Created and maintained by the UCS, an organization renowned for its scientific research and advocacy, the database is one of the most detailed and publicly accessible resources of its kind.

Launched in 2005, the database is a testament to the UCS's dedication to democratizing information about space-based . Updated approximately quarterly, it offers detailed insights into more than 6,000 active satellites from multiple countries and organizations, promoting transparency, awareness, and understanding of space activities.

Why is the UCS Satellite Database Important?

In an age where space is becoming increasingly commercialized and congested, the UCS Satellite Database provides essential data for a broad audience, from researchers and makers to journalists and the general public. Here's why it's important:

  • Transparency and Accountability: The database aids in promoting transparency about global space activities, helping hold countries and organizations accountable for their actions in space.
  • : With increasing numbers of satellites, effective space traffic management becomes critical. The database offers valuable data to help prevent potential collisions and enhance sustainable space practices.
  • Research and Education: The database is a valuable tool for researchers studying trends in space launches, technology, and policy. It's also a great resource for educators and students seeking to understand space technology.
  • Policy Making and Advocacy: The UCS uses the database to inform its advocacy work, helping shape policies that promote responsible and peaceful uses of space.

What Information Does the UCS Satellite Database Contain?

The UCS Satellite Database contains a wealth of information about each satellite:

  • Name of the Satellite: Every satellite has an officially registered name, and this is logged in the database.
  • Country of Operator: This refers to the country that operates the satellite, which may be different from the country that owns the satellite or that launched it.
  • Users: This defines the type of entity using the satellite — whether it's civil, commercial, , , or a mix.
  • Purpose: The specific function of the satellite, such as , technology development, communications, or navigation.
  • Orbit Type: This could be low Earth orbit (), medium Earth orbit (MEO), geostationary orbit (GEO), or elliptical.
  • Date: The date when the satellite was launched.
  • Expected Lifetime: The expected operational duration of the satellite from the time of launch.


Through the Union of Concerned Scientists Satellite Database, we gain a clearer picture of human activity in Earth orbit. By democratizing access to this information, the UCS ensures that the citizens of Earth can take part in understanding and shaping humanity's future.



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