SATELLITE CATEGORY GUIDE
Science Satellite Directory: Research Missions Across Earth Orbit
The Science Satellites category collects a broad set of research-oriented spacecraft. Their missions can include astronomy, Earth science, atmospheric studies, space physics and technology investigations, so the orbital designs can be very different from one satellite to another.
Mission purpose shapes the orbit
There is no single “science orbit.” Earth-observing missions may favor sun-synchronous paths, astronomy observatories can use low Earth or other specialized orbits, and space-physics missions may require unusual altitudes or inclinations. Comparing entries in this directory shows how orbit design supports a scientific objective.
The tracker describes where a catalogued spacecraft is calculated to be; it does not show the mission's scientific data stream, observing schedule or instrument status. For official results, use the responsible science agency or mission team.
Related SpaceTracker.live tools
Open the Hubble Space Telescope tracker for a well-known Earth-orbiting observatory. For spacecraft that have left ordinary Earth orbit, use the separate Deep Space section, which relies on NASA/JPL Horizons rather than SGP4 Earth-orbit propagation.
How this directory works
Because this category mixes many mission types, choose a specific science spacecraft before interpreting its orbit. The individual tracker can explain Earth-orbit geometry for that object; mission data products and observing schedules come from the responsible science team.
There is no single accuracy profile for every science mission. Low-orbit spacecraft, high-altitude missions and manoeuvring platforms respond differently to element age, so the calculation should be interpreted in the context of the selected mission.
What to remember about accuracy
Frequently asked questions
Is the position direct spacecraft telemetry?
No. The live map is calculated from public orbital elements.
Does appearing in this directory mean a satellite is operational?
No. Catalog membership and mission status are different things.
Can I track one object in more detail?
Yes. Select an Earth-orbiting science spacecraft and open its tracker to calculate its current position and observer geometry.
Sources and related tools
- CelesTrak: General Perturbations data formats
- NASA Science
- SpaceTracker.live Satellite Directory
- How SpaceTracker.live calculates positions
Educational-use note: SpaceTracker.live is an independent educational website. Positions and pass predictions are calculated from third-party orbital elements and may be delayed or approximate. Do not use them for navigation, collision avoidance or other safety-critical decisions.