A Startup Just Built a Satellite Designed to Inspect — and Shadow — Any Other Satellite in Geostationary Orbit. Including the Military Ones.

There are roughly 560 active satellites sitting perfectly still above Earth right now.

Not moving. Not drifting. Perfectly still.

They hover at 35,786 kilometres up — moving at exactly the speed Earth rotates, frozen above the same spot forever. Weather satellites. Broadcast relays. Military early-warning systems. The backbone of global communications. The eyes America, China, and Russia quietly point at each other from the high ground of space.

Nobody could get near them. That was the whole point.

Today, a San Francisco startup called Astranis changed that.

The Orbit Nobody Talks About

Most people picture satellites zipping overhead — the ones you can spot at dusk, the live dots on SkyLens, the ISS racing past every 90 minutes at 420 km up.

Geostationary orbit is something else entirely.

35,786 km

The altitude where a satellite appears to freeze in the sky — over 90× higher than the ISS

At that precise altitude above the equator, orbital mechanics does something almost magical: a satellite's orbital period exactly matches Earth's rotation. From the ground, it looks motionless. That's why your TV dish points at one fixed spot. That's why missile early-warning radars can watch an entire continent without ever slewing their antenna.

560+Active satellites in GEO

35,786 kmAltitude above equator

3.07 km/sOrbital speed — slower than a speeding bullet

Up there right now: America's SBIRS missile early-warning satellites scanning for ICBM launches. Chinese military communications relays. Russian signals intelligence platforms. The emergency broadcast backbone that governments use when everything else goes dark.

GEO is, quietly, one of the most strategically important places humanity has ever put hardware.

Key takeaway: Geostationary orbit is the high ground of the satellite era. It's where the most valuable, most sensitive, most irreplaceable assets in orbit live — and until now, getting close to them required years of planning and billions of dollars.

What Astranis Actually Built

Astranis isn't a defense contractor. They're the kind of startup that shows up in tech blogs — known for making small, affordable GEO broadband satellites for remote communities. Island nations. Rural telecoms. The underserved corners of the connected world.

Their new spacecraft is a different animal.

According to SpaceNews, Astranis unveiled a geostationary satellite specifically designed to inspect, track, and maneuver around other satellites in GEO. That's a capability called rendezvous and proximity operations — RPO. It means the spacecraft can approach another satellite, close the distance to meters if needed, observe it, photograph it, and follow it.

RPORendezvous & Proximity Operations

GEO beltTarget orbital regime

CommercialAvailable for hire — not government-only

Until now, RPO in GEO was a capability only a handful of nation-states could field — and even then, only through classified military programmes that took decades to develop. Russia tested proximity operations on a US satellite in 2022. China has been developing similar capabilities the Space Force calls "alarming."

Astranis is offering it on the commercial market.

To be fair: Astranis hasn't announced contracts to surveil rival nations' satellites. There are entirely legitimate uses: if your own satellite malfunctions in GEO — a stuck solar panel, an antenna that won't deploy — an inspection spacecraft could diagnose it remotely. Satellite servicing is a real and growing industry. Someone has to build the tools. Astranis's previous work is civilian broadband, not espionage.

The Part Nobody Has Worked Out Yet

Here's the problem with dual-use technology in space.

You cannot tell the difference between a spacecraft servicing a broken solar panel and a spacecraft conducting strategic reconnaissance of a military asset. Both look identical from the ground. Both use the same orbital mechanics. Both close to the same distances.

International treaties that specifically prohibit proximity operations on rival satellites in geostationary orbit

There are no rules.

The 1967 Outer Space Treaty — still the foundational document of space law — prohibits weapons of mass destruction in orbit and bans territorial claims on celestial bodies. It says nothing about one satellite flying alongside another and photographing it at 50 metres' range. The diplomatic and legal vacuum around RPO has been discussed at the UN Committee on the Peaceful Uses of Outer Space for years. Nothing binding has emerged.

Meanwhile, every major military on Earth has been quietly racing to develop exactly this capability. The 2025 Annual Threat Assessment from the Director of National Intelligence specifically flagged Chinese satellite proximity operations as a strategic concern. The US Space Force's entire "space domain awareness" mission is built around knowing where these spacecraft are and what they're doing.

However: The most likely early customer for Astranis's spacecraft is probably a US government agency — the Space Force or NRO — that needs better visibility into what foreign satellites are doing in GEO. If so, this is less a threat to American assets and more a commercial tool for watching everyone else's. That's still a significant shift. It just runs in the opposite direction from the alarming framing.

Why the Economics Changed Everything

The assumption that kept GEO peaceful was simple: it costs too much to do anything aggressive up there.

Getting to geostationary orbit requires a dedicated upper stage, enormous delta-v, and until recently a launch bill that ran into hundreds of millions just for the ride. Nobody was going to spend that to sneak up on a competitor's satellite. The economics enforced a kind of accidental stability.

~10×Drop in GEO launch costs over 15 years

2026Year commercial GEO surveillance became real

16,106Total tracked objects in Earth orbit today

The same commercial launch revolution that gave us Starlink and cheap LEO constellations has been quietly driving down the cost of reaching GEO too. Smaller, cheaper spacecraft like Astranis's previous work proved the economics could work at a fraction of legacy costs.

If Astranis can do this, so can twelve other companies. So can state actors with commercial launch access. The barrier that made GEO surveillance impossible isn't there anymore.

Every satellite in geostationary orbit was designed on the assumption that nobody would get close enough to look at it properly. The exact configurations of antennas, sensors, and reflector arrays are often classified — not because they're secret weapons, but because the specifics of how they work reveal capabilities that governments prefer rivals not to know. A spacecraft that can orbit alongside at close range changes what any adversary can learn about any satellite up there.

You can follow the 16,000+ tracked objects in low Earth orbit on the SkyLens live tracker right now. What happens in GEO is harder to monitor from the ground — and that invisibility is exactly why Astranis's announcement lands differently than another LEO constellation story.

Key takeaway: The same commercial logic that made Starlink possible is being applied to satellite surveillance. The technology is real, the company is credible, and the strategic implications for every government with assets in geostationary orbit haven't fully landed yet — because nobody has a rulebook for this.

The Questions Worth Watching

Astranis hasn't announced a launch date, pricing, or a named first customer. Those details will matter enormously for understanding what this spacecraft actually becomes.

Watch for which government agencies surface as early users. Watch for whether China or Russia respond publicly — or just accelerate their own programmes quietly. Watch whether the UN space law community finally moves on RPO regulations, a conversation that's been happening in conference rooms since at least 2019 with no binding result.

The satellite hasn't launched yet. But the era it represents already has.

For more stories about what's actually happening in orbit — and what you can track yourself — browse the full SkyLens archive.

See what's live in orbit right nowOpen live tracker

SkyLens editorial — live CelesTrak + NASA/JPL data (16106 objects)