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Active Satellites in Orbit
a standing total, not a daily count
Estimated, not measured
EarthNow's estimate for "Active Satellites in Orbit". This signal does not yet have a written explanation — the unit and the method below are what the site can state about it honestly.
Nobody counts this as it happens. EarthNow takes a published figure for the whole day, divides it by the 86,400 seconds in a day, and multiplies by the seconds elapsed since midnight UTC. So the value climbs smoothly and is the right order of magnitude — but the smoothness is arithmetic, not observation. Nothing happening in the world is being watched in real time.
value = daily total ÷ 86,400 × seconds since 00:00 UTC
A consequence worth knowing: the counter resets at midnight UTC, not at your midnight. And because every signal advances at a constant rate, this page cannot tell you whether today is unusual. For that you need a measurement.
Active satellites in orbit, per ESA's space environment reporting.
The figure is theirs; the running total is ours. Cite them for the number, and EarthNow for what it looks like as it accumulates.