X-37 Satellite Bus
Data current as of 2026-07-22.
The X-37 bus accounts for 8 cataloged objects, of which 1 are in orbit and 1 are active. 7 have reentered. Most are built by BOHB. The largest operator on this bus is AFRCO. The first launched in 2010, the most recent in 2025.
1
In orbit
1
Active
8
Total launched
7
Reentered
X-37 launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged X-37 satellites.
| Manufacturer | BOHB |
|---|---|
| Purpose | Reusable satellite |
| Launch mass | 5000 kg |
| Dry mass | 5000 kg |
| Length | 8.8 m |
| Diameter | 2.9 m |
| Span | 8.8 m |
| Shape | Half Cyl + 2 Wing |
| Power | Deployable solar array, batteries |
| Propulsion | AOCS |
| Design life | 270 days (nominal); 225 days (#1); 469 days (#2); 675 days (#3) |
| Equipment | ? |
Top operators
AFRCO 8
Top countries
US 8
X-37 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| USA 555 USA 555 | 65271 | · | AFRCO | Aug 22, 2025 | · | Active | ◉ |
| USA 349 X-37B OTV-7 | 58666 | 2023-210A | AFRCO | Dec 29, 2023 | · | Reentered | ◉ |
| OTV 6 (USA 299) X-37B OTV-6 | 45606 | 2020-029A | AFRCO | May 17, 2020 | · | Reentered | ◉ |
| OTV 5 (USA 277) X-37B OTV-5 | 42932 | 2017-052A | AFRCO | Sep 7, 2017 | · | Reentered | ◉ |
| OTV 4 (USA 261) X-37B OTV-4 | 40651 | 2015-025A | AFRCO | May 20, 2015 | · | Reentered | ◉ |
| OTV 3 (USA 240) X-37B OTV-3 | 39025 | 2012-071A | AFRCO | Dec 11, 2012 | · | Reentered | ◉ |
| OTV 2 (USA 226) X-37B OTV-2 | 37375 | 2011-010A | AFRCO | Mar 5, 2011 | · | Reentered | ◉ |
| OTV 1 (USA 212) X-37B OTV-1 | 36514 | 2010-015A | AFRCO | Apr 22, 2010 | · | Reentered | ◉ |
Frequently asked questions
How many X-37 satellites are there?
The catalog lists 8 objects built on the X-37 bus. 1 are in orbit and 7 have reentered.
How many X-37 satellites are in orbit?
1 X-37 objects are currently in orbit, of which 1 carry an active status.
Who builds the X-37 bus?
The X-37 bus is most commonly built by BOHB.
When did the first X-37 satellite launch?
The first cataloged X-37 satellite launched in 2010, and the most recent in 2025.