EPE Satellite Bus
Data current as of 2026-07-20.
The EPE bus accounts for 4 cataloged objects, of which 0 are in orbit and 0 are active. 4 have reentered. Most are built by RAYM. The largest operator on this bus is NASA. The first launched in 1961, the most recent in 1964.
0
In orbit
0
Active
4
Total launched
4
Reentered
EPE launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged EPE satellites.
| Manufacturer | RAYM |
|---|---|
| Launch mass | 38 kg |
| Dry mass | 38 kg |
| Length | 0.5 m |
| Diameter | 0.7 m |
| Span | 1.3 m |
| Shape | Oct Cyl + Ant + 4 Pan |
Top operators
Top countries
US 4
EPE satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| EXPLORER 26 (EPE-D) Explorer 26 | 00963 | 1964-086A | GSFC | Dec 21, 1964 | 89 min, 19.7° | Reentered | ◉ |
| EXPLORER 15 (SERB 53B) Explorer 15 | 00445 | 1962-059A | GSFC | Oct 27, 1962 | 311 min, 18.0° | Reentered | ◉ |
| EXPLORER 14 (SERB 53A) Explorer 14 | 00432 | 1962-051A | GSFC | Oct 2, 1962 | 2158 min, 33.6° | Reentered | ◉ |
| EXPLORER 12 Explorer 12 | 00170 | 1961-020A | GSFC | Aug 16, 1961 | 1595 min, 33.8° | Reentered | ◉ |
Frequently asked questions
How many EPE satellites are there?
The catalog lists 4 objects built on the EPE bus. 0 are in orbit and 4 have reentered.
How many EPE satellites are in orbit?
0 EPE objects are currently in orbit, of which 0 carry an active status.
Who builds the EPE bus?
The EPE bus is most commonly built by RAYM.
When did the first EPE satellite launch?
The first cataloged EPE satellite launched in 1961, and the most recent in 1964.