Cubesat 4U Satellite Bus
Data current as of 2026-07-20.
The Cubesat 4U bus accounts for 9 cataloged objects, of which 5 are in orbit and 5 are active. 1 have reentered. Most are built by SPIREG. The largest operator on this bus is SPIRE/LACU. The first launched in 2023, the most recent in 2026.
5
In orbit
5
Active
9
Total launched
1
Reentered
Cubesat 4U launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged Cubesat 4U satellites.
| Manufacturer | SPIREG |
|---|---|
| Launch mass | 5 kg |
| Dry mass | 5 kg |
| Length | 0.4 m |
| Diameter | 0.1 m |
| Span | 0.4 m |
| Shape | Box |
| Typical orbit | 96 min period, 98° inclination |
Top operators
SPIRE/LACU 6 IOTA 1
Top countries
US 7 CN 1 UK 1
Cubesat 4U satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OBJECT J | 68635 | 2026-074J | UCO | Apr 7, 2026 | 94 min, 60.0° | Inactive | ◉ |
| AAC-IO1 | 68498 | 2026-067CL | IOTA | Mar 30, 2026 | 97 min, 97.8° | Inactive | ◉ |
| LEMUR-2-MYRA | 66787 | 2025-276EC | SPIRE/LACU | Nov 28, 2025 | 96 min, 97.5° | Inactive | ◉ |
| LEMUR-2-VUKASIN | 66785 | 2025-276EA | SPIRE/LACU | Nov 28, 2025 | 96 min, 97.5° | Active | ◉ |
| LEMUR-2-FINNIAN | 66782 | 2025-276DX | SPIRE/LACU | Nov 28, 2025 | 96 min, 97.5° | Active | ◉ |
| LEMUR-2-CELIJO-SB-PK | 66781 | 2025-276DW | SPIRE/LACU | Nov 28, 2025 | 96 min, 97.5° | Active | ◉ |
| LEMUR-2-LUCILLE-ROSE | 65403 | 2025-135BV | SPIRE/LACU | Jun 23, 2025 | 96 min, 97.8° | Active | ◉ |
| LEMUR 2 KARENDARRELL | 64841 | 2025-135BU | SPIRE/LACU | Jun 23, 2025 | 96 min, 97.8° | Active | ◉ |
| OBJECT A Jinta | 56159 | 2023-049A | HANGSH | Apr 2, 2023 | 88 min, 97.4° | Reentered | ◉ |
Frequently asked questions
How many Cubesat 4U satellites are there?
The catalog lists 9 objects built on the Cubesat 4U bus. 5 are in orbit and 1 have reentered.
How many Cubesat 4U satellites are in orbit?
5 Cubesat 4U objects are currently in orbit, of which 5 carry an active status.
Who builds the Cubesat 4U bus?
The Cubesat 4U bus is most commonly built by SPIREG.
When did the first Cubesat 4U satellite launch?
The first cataloged Cubesat 4U satellite launched in 2023, and the most recent in 2026.