Unknown Satellite Bus
Data current as of 2026-07-21.
The Unknown bus accounts for 11 cataloged objects, of which 10 are in orbit and 10 are active. 1 have reentered. Most are built by UNKUS. The largest operator on this bus is SFSSC. The first launched in 2016, the most recent in 2025.
10
In orbit
10
Active
11
Total launched
1
Reentered
Unknown launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged Unknown satellites.
| Manufacturer | UNKUS |
|---|---|
| Purpose | ? |
| Launch mass | 3200 kg |
| Dry mass | 2800 kg |
| Length | 7 m |
| Diameter | 2.5 m |
| Span | 35 m |
| Shape | Box |
| Power | Deployable solar arrays, batteries |
| Propulsion | ? |
| Equipment | ? |
| Typical orbit | 1436 min period, 0° inclination |
Top operators
SFSSC 8 AFRL 1 AFSMC 1 ZHELZ 1
Top countries
US 9 CN 1
Unknown satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| USA 568 | 66551 | 2025-271AE | SFSSC | Nov 30, 2025 | 91 min, 53.2° | Active | ◉ |
| LIMASAT | 65272 | · | AFRL | Aug 22, 2025 | · | Active | ◉ |
| USA 569 | 66552 | · | SFSSC | Jul 30, 2024 | · | Active | ◉ |
| USA 567 | 66145 | · | SFSSC | Jul 30, 2024 | · | Active | ◉ |
| USA 566 | 65724 | · | SFSSC | Jul 30, 2024 | · | Active | ◉ |
| USA 398 USA 398 | 60324 | 2024-134C | SFSSC | Jul 30, 2024 | 1456 min, 0.3° | Active | ◉ |
| USA 397 USA 397 | 60323 | 2024-134B | SFSSC | Jul 30, 2024 | 1458 min, 0.3° | Active | ◉ |
| USA 396 USA 396 | 60322 | 2024-134A | SFSSC | Jul 30, 2024 | 1432 min, 0.1° | Active | ◉ |
| USA 342 CBAS 2 | 55263 | 2023-008A | SFSSC | Jan 15, 2023 | 1436 min, 0.0° | Active | ◉ |
| USA 283 CBAS-SATCOM | 43339 | 2018-036A | AFSMC | Apr 14, 2018 | 1436 min, 0.0° | Active | ◉ |
| LISHUI 1-01 Lishui 1-01 | 41845 | 2016-066E | ZHELZ | Nov 9, 2016 | 89 min, 98.7° | Reentered | ◉ |
Frequently asked questions
How many Unknown satellites are there?
The catalog lists 11 objects built on the Unknown bus. 10 are in orbit and 1 have reentered.
How many Unknown satellites are in orbit?
10 Unknown objects are currently in orbit, of which 10 carry an active status.
Who builds the Unknown bus?
The Unknown bus is most commonly built by UNKUS.
When did the first Unknown satellite launch?
The first cataloged Unknown satellite launched in 2016, and the most recent in 2025.