Ephemera ephemera.space

Every eight hours, SpaceX publishes where each Starlink satellite is going, with its uncertainty. It is the only public feed of its kind. Each set is replaced by the next. Ephemera keeps the history.

The archive record

As of 2026-08-31 20:31 UTC the archive holds 5 cycles. 4 are complete with Merkle roots and 4 are anchored in Bitcoin through OpenTimestamps. Raw data kept: 91 GB. Poller heartbeat coverage: not yet measured (heartbeat history shorter than 24 h). Cadence holds (a manifest served longer than 9 hours): 0. This project exists because SpaceX publishes the feed openly.

first seen (utc)cyclefiles recordedraw gb merkle rootopentimestampswayback machine
2026-08-31 20:22513b92c4683epulling now: 0 of 10,481 so far0.0nonefollows the pullpending
2026-08-31 11:441d424255c9ae8,568 / 8,56817.46df13e066f37block 964903manifest ok, 10/10 samples verified
2026-08-31 04:095e4faf0f4e4e9,353 / 9,35319.091ca361b797ablock 964904lost: cycle superseded before witnessing completed: 1 manifest + 10 sample captures never made
2026-08-30 20:0292e6892c0f3e9,111 / 9,11118.58c653747b19ablock 964904lost: cycle superseded before witnessing completed: 1 manifest + 10 sample captures never made
2026-08-30 13:3272bcd7796b4917,861 / 17,86136.2677d3043ef28block 964904lost: cycle superseded before witnessing completed: 1 manifest + 10 sample captures never made

Method: built from each cycle's cycle.json and witness.json in the poller's spool; coverage is the fraction of the last 24 h's minutes with a watcher heartbeat under 10 minutes old (D18); a cadence hold is a manifest first-seen gap over 9 h. Poller: home (Cape Town, residential; single poller until poller A exists). Full data: ledger.json; the verification procedure a stranger can run is in the repository's VERIFY.md (independent Merkle re-implementation, OpenTimestamps against a Bitcoin block, Wayback copies re-hashed).

Daily roots

2026-08-30: 1d7acc715f62 (stamp pending)

A daily scoreboard is under construction. It will show how well the public satellite catalogue can actually see the constellation.

Contact

Kira Ryan. KiraRyan27@gmail.com, linkedin.com/in/kira-ryan.