D-1 Satellite Bus
Data current as of 2026-07-20.
The D-1 bus accounts for 3 cataloged objects, of which 3 are in orbit and 0 are active. Most are built by CNES. The largest operator on this bus is CNES. The first launched in 1966, the most recent in 1967.
3
In orbit
0
Active
3
Total launched
0
Reentered
D-1 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged D-1 satellites.
| Manufacturer | CNES |
|---|---|
| Purpose | Geodesy |
| Launch mass | 23 kg |
| Dry mass | 23 kg |
| Length | 0.2 m |
| Diameter | 0.5 m |
| Span | 1.5 m |
| Shape | Cyl + 4 Pan |
| Power | 4 deployable fixed solar arrays, batteries |
| Propulsion | None |
| Equipment | 144 retro reflectors |
| Typical orbit | 98 min period, 34° inclination |
Top operators
Top countries
F 3
D-1 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| DIADEME 2 Diademe D-1D | 02680 | 1967-014A | CNES | Feb 15, 1967 | 107 min, 39.4° | Inactive | ◉ |
| DIADEME 1 Diademe D-1C | 02674 | 1967-011A | CNES | Feb 8, 1967 | 98 min, 39.9° | Inactive | ◉ |
| DIAPASON (D1-A) Diapason D-1A | 02016 | 1966-013A | CNES | Feb 17, 1966 | 114 min, 34.1° | Inactive | ◉ |
Frequently asked questions
How many D-1 satellites are there?
The catalog lists 3 objects built on the D-1 bus. 3 are in orbit and 0 have reentered.
How many D-1 satellites are in orbit?
3 D-1 objects are currently in orbit, of which 0 carry an active status.
Who builds the D-1 bus?
The D-1 bus is most commonly built by CNES.
When did the first D-1 satellite launch?
The first cataloged D-1 satellite launched in 1966, and the most recent in 1967.