How many satellites is that?
The number of active satellites has quadrupled since 2019, almost entirely because of one constellation.
91% of an all active satellites
10,000 objects is more than 4 of the 7 references on this page.
Reference figures are measurements and are rounded; the unit conversion behind them is exact.
| Reference | Size | Yours ÷ theirs | Note |
|---|---|---|---|
| Apollo-era satellites, 1969 | 1,800 objects | 5.56× | |
| active satellites in 2019 | 2,200 objects | 4.55× | |
| satellites in 2000 | 2,600 objects | 3.85× | |
| Starlink in orbit | 7,000 objects | 1.43× | |
| all active satellites | 11,000 objects | 0.909× | |
| tracked debris over 10 cm | 36,500 objects | 0.274× | |
| debris over 1 cm | 1,000,000 objects | 1/100 | Estimated, mostly untracked |
Worth knowing
- More than half of all active satellites belong to a single constellation, launched since 2019.
- About a million pieces of debris over a centimetre are in orbit. At 28 000 km/h, a one-centimetre fragment hits like a hand grenade.
Frequently asked
How many satellites are in orbit?
Roughly 11 000 active ones, plus tens of thousands of tracked dead satellites and debris fragments. The active number is rising by thousands a year.
What is Kessler syndrome?
A runaway cascade where collisions generate debris that causes further collisions, potentially making some orbits unusable for generations. It is a slow risk, not an imminent one.
How to read this
Counts change monthly; these are recent representative figures.