Shi Jian 25 beside Shi Jian 21
A satellite of Shanghai Academy of Space Technology (CASC 8th Acad) came up beside a satellite of Shanghai Academy of Space Technology (CASC 8th Acad), 2.83 km away at the nearest its sources state.
Reported: 1 public report other than Orbinauts names these two.
From the public record
- From
- Dec 1, 2025
- to Jan 16, 2026
- Closest stated
- 2.83 km
- Jan 13, 2026
- Orbit
- GEO
- geostationary orbit, over 127.2° E
The one that moved
Shi Jian 25
Shanghai Academy of Space Technology (CASC 8th Acad), CN
62485 · 2025-002 · launched Jan 6, 2025
The one it came up to
Shi Jian 21
Shanghai Academy of Space Technology (CASC 8th Acad), CN
49330 · 2021-094A · launched Oct 24, 2021
What the sources state
Every day and distance here is the sources’ own, to the precision they state.
- When
- Dec 1, 2025 to Jan 16, 2026
- BesideDec 1, 2025 to Dec 5, 2025
- under 1 km on 1 to 5 December 2025; 60 to 65 km on 15 December; 1.3 km on 18 December; indistinguishable on 20 December; within 5 km 1 to 15 January 2026
- Closest statedJan 13, 2026
- minimum range of about 2.83 km occurred on 13 Jan 2026
- LeftJan 16, 2026
- 16 January 2026: 130 km apart, SJ-25 leaving at 50 km a day; about 600 km apart by 6 February
The detector was not yet running: it reads low Earth orbit since April 2026 and the geostationary belt since October 2026.
Reported elsewhere
Who else said these two were together, earliest first.
| Said on | Who | What |
|---|---|---|
| Feb 9, 2026 | Tracker | Integrity ISR, Integrity Flash issues 136 (22 December 2025), 137 (19 January 2026) and 138 (9 February 2026) |