The ER763-4 satellite was a mass model, which was launched as payload substitute on a Kosmos-3M launch.
| Nation: | USSR |
|---|---|
| Type / Application: | Dummy satellite |
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| Mass: | |
| Orbit: | 463 km × 513 km, 50.65° |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| Kosmos 906 (ER763-4) | 1977-031A | 27.04.1977 | KY LC-107 | Kosmos-3M |
