STARCLOUD‑1

When it goes over Adelaide

Passes above 10° elevation over the next 5 days. Starcloud-1 is small and low — at magnitude terms it is not an easy naked-eye object, but a sunlit pass at high elevation is worth a look just after dusk.

Its orbit does not match the pitch

Starcloud's entire commercial argument is sunlight. The company's FCC application for 88,000 satellites puts them in sun-synchronous orbit at 600–850 km, where a satellite stays in sunlight almost permanently and the solar panel does roughly eight times the work it would on the ground.

Starcloud-1 is not in that orbit. It flew on Bandwagon-4 — SpaceX's mid-inclination rideshare series, which exists precisely because it is not the sun-synchronous Transporter line. The Space-Track element set puts it at 45.40° inclination, 501 km mean altitude, near-circular, 94.7 minutes per revolution — the live readout above swings a few kilometres either side of that through each orbit.

Propagate that element set through one revolution and the satellite is in sunlight roughly 62% of the time. A dawn-dusk sun-synchronous orbit — the one in the application — sits above 99%. That is the orange and blue on the map above: it is not decoration, it is the gap between the pitch and the hardware. Which is fine: it is a technology demonstrator, and it proved the chip survives. But it did not demonstrate the power thesis, because it is not in the orbit the power thesis needs.

The eleven-month clock does not add up

Starcloud-1 was pitched with an eleven-month operational life, after which the spacecraft performs a controlled deorbit and disintegrates in the atmosphere. It launched on 2 November 2025. Eleven months puts the end of mission at roughly 2 October 2026.

Compare two element sets and you can measure the decay directly. Between the epoch of 1 June 2026 and 15 July 2026 — 44.5 days — mean altitude fell from 502.5 km to 501.1 km. That is 30 metres per day.

At that rate Starcloud-1 does not come down in eleven months. It does not come down in eleven years. Atmospheric drag climbs steeply as a satellite loses height, so a linear projection overstates the tail badly — but not by the order of magnitude required to turn three decades into three months. At 501 km, natural decay is a decade-plus proposition.

Which means the deorbit is not a matter of letting physics take its course. It depends entirely on propulsion firing, on schedule, on a 60 kg demonstrator. If it fires, the commitment is met and this paragraph is a footnote. If it does not, a dead GPU stays in low Earth orbit long past the FCC’s five-year post-mission disposal rule, and there is no passive backstop.

That matters more than one satellite. Starcloud filed with the FCC in February 2026 for a constellation of up to 88,000 satellites. The disposal case for a fleet that size rests on deorbit working as designed, every time. The first demonstrator is the only evidence anyone has. It is worth watching whether it comes down on 2 October — and this page will keep propagating the element set either way. The follow-up, Starcloud-2, launches late 2026 carrying Bitcoin-mining hardware, and inherits every one of these questions at a hundred times the power.

What is actually up there

Payload

NVIDIA H100 GPU

Mass

60 kg

Bus

Astro Digital Corvus-Micro

Launch

2 Nov 2025, 05:09:59 UTC

Vehicle

Falcon 9 · B1091 · SLC-40

Mission

Bandwagon-4 rideshare

Deployed

05:22:38 UTC (T+73 min)

Inclination

45.40°

Altitude

501 km circular

Period

94.7 minutes

Downlink

400.5 MHz FSK, 40k baud

Also known as

LUMEN-1

Downlink details from SatNOGS, flagged unconfirmed. Note the operator was renamed from Lumen Orbit to Starcloud in early 2025 after a challenge from Lumen Technologies — some catalogues still carry the old name.

What it has done in orbit

November 2025 — Reached orbit and made contact. First data-centre-class GPU in space.

December 2025 — Ran Google's Gemma model on the H100: the first large language model operated on a high-powered GPU aboard a spacecraft. Then trained Andrej Karpathy's nanoGPT in orbit — the first in-orbit training run.

Ongoing — Running inference on synthetic-aperture radar data from Capella Space, drawing conclusions on orbit without downlinking the raw imagery first. This is the part that matters commercially: the value is not the compute, it is not moving the data.

From early 2027 — Crusoe plans to offer limited commercial access to orbital GPU capacity under an agreement with Starcloud.

The element set this page is propagating

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