Compare rockets
Pick up to 4 vehicles to compare specs and flight records side by side. Browse all →
| Specification | Athena I Lockheed Martin × remove | Soyuz U Russian Federal Space Agency (ROSCOSMOS) × remove | Proton K/DM-2 Khrunichev State Research and Production Space Center × remove |
|---|---|---|---|
| Flights | 4 | 714 | 110 |
| Success rate | 75% | 97.2% | 93.6% |
| Thrust | 1,900 kN | — | — |
| Height | 18.9 m | 51.1 m | — |
| Diameter | 2.36 m | 2.95 m | — |
| Launch mass | 66 t | 313 t | — |
| LEO capacity | 820 kg | 6,900 kg | — |
| GTO capacity | — | — | — |
| Launch cost | — | — | — |
| Reusable | No | No | No |
| Stages | 3 | 3 | — |