Compare rockets
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| Specification | Conestoga 1620 Space Services Inc. × remove | Space Shuttle National Aeronautics and Space Administration × remove | Proton K/DM-2 Khrunichev State Research and Production Space Center × remove |
|---|---|---|---|
| Flights | 1 | 135 | 110 |
| Success rate | 0% | 98.5% | 93.6% |
| Thrust | — | 28,200 kN | — |
| Height | — | 56.1 m | — |
| Diameter | — | 8 m | — |
| Launch mass | — | 2,030 t | — |
| LEO capacity | 1,179 kg | 27,500 kg | — |
| GTO capacity | — | — | — |
| Launch cost | — | $450M | — |
| Reusable | No | Yes | No |
| Stages | 4 | 2 | — |