AE-C Satellite Bus
Data current as of 2026-07-20.
The AE-C bus accounts for 3 cataloged objects, of which 0 are in orbit and 0 are active. 3 have reentered. Most are built by RCA. The largest operator on this bus is NASA. The first launched in 1973, the most recent in 1975.
0
In orbit
0
Active
3
Total launched
3
Reentered
AE-C launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged AE-C satellites.
| Manufacturer | RCA |
|---|---|
| Launch mass | 668 kg |
| Dry mass | 500 kg |
| Length | 1.1 m |
| Diameter | 1.4 m |
| Span | 1.4 m |
| Shape | Cyl |
| Propulsion | MRE-4 |
Top operators
Top countries
US 3
AE-C satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| EXPLORER 55 (AE-5) AE-E | 08440 | 1975-107A | GSFC | Nov 20, 1975 | 87 min, 19.6° | Reentered | ◉ |
| EXPLORER 54 (AE-D) AE-D | 08353 | 1975-096A | GSFC | Oct 6, 1975 | 90 min, 89.9° | Reentered | ◉ |
| EXPLORER 51 (AE-C) AE-C | 06977 | 1973-101A | GSFC | Dec 16, 1973 | 88 min, 67.9° | Reentered | ◉ |
Frequently asked questions
How many AE-C satellites are there?
The catalog lists 3 objects built on the AE-C bus. 0 are in orbit and 3 have reentered.
How many AE-C satellites are in orbit?
0 AE-C objects are currently in orbit, of which 0 carry an active status.
Who builds the AE-C bus?
The AE-C bus is most commonly built by RCA.
When did the first AE-C satellite launch?
The first cataloged AE-C satellite launched in 1973, and the most recent in 1975.