| Orbital Sciences Corp. / US Air Force | Pegasus | Pegasus-H | Pegasus XL | |||||
|
Overall Vehicle |
Operational | from | 05.04.1990 | 03.04.1995 | 27.06.1994 | |||
| to | 03.08.1994 | 09.10.2000 | 13.06.2021 | |||||
| Orbital flights | 6 | 4 | 35 | |||||
| Payload weight | t | LEO | 0.455 | LEO | 0.455 | LEO | 0.544 | |
| Gross liftoff weight | t | 19.20 | 19.20 | 22.65 | ||||
| Gross propellant weight | t | 16.02 | 16.02 | 19.78 | ||||
| Total length | m | 15.43 | 15.43 | 16.94 | ||||
| Max. diameter (span) | m | 6.71 | 6.71 | 6.71 | ||||
| Total liftoff thrust (s.l.) | kN | 500 | 500 | 647.5 | ||||
| Total impulse (vac) | MN*s | 46.0 | 46.0 | 56.8 | ||||
|
Fairing |
Total length | m | 4.41 | 4.41 | 4.41 | |||
| Diameter | m | 1.27 | 1.27 | 1.27 | ||||
| Total weight | t | 0.17 | 0.17 | 0.17 | ||||
|
Stage 4 |
Name | (HAPS) | (HAPS) | (HAPS) | ||||
| Length | m | 0.71 | 0.71 | 0.71 | ||||
| Diameter | m | 0.40 | 0.40 | 0.40 | ||||
| Liftoff weight | t | ? | ? | ? | ||||
| Propellant weight | t | 0.072 | 0.072 | 0.072 | ||||
| Engines | MR-107N (3) | MR-107N (3) | MR-107N (3) | |||||
| Propellant | Hydrazine | Hydrazine | Hydrazine | |||||
| Total thrust (vac) | kN | 0.67 | 0.67 | 0.67 | ||||
| Specific impulse (vac) | N*s/kg | 2265 | 2265 | 2265 | ||||
| Burn time | s | 245 | 245 | 245 | ||||
| Total impulse (vac) | MN*s | 0.16 | 0.16 | 0.16 | ||||
| Stage 3 |
Name |
Orion 38 | Orion 38 | Orion 38 | ||||
| Length (+Avionic) | m | 1.34 (1.76) | 1.34 (1.76) | 1.34 (1.76) | ||||
| Diameter | m | 1.27 (0.96) | 1.27 (0.96) | 1.27 (0.96) | ||||
| Liftoff weight (+Ad.. Av.) | t | 1.180 | 1.180 | 1.180 | ||||
| Propellant weight | t | 0.771 | 0.771 | 0.771 | ||||
| Engines | ATK | ATK | ATK | |||||
| Propellant | solid HTPB | solid HTPB | solid HTPB | |||||
| Total thrust (vac) | kN | 32.2 (av) | 32.2 (av) | 32.2 (av) | ||||
| Specific impulse (vac) | N*s/kg | 2834 | 2834 | 2834 | ||||
| Burn time | s | 67.7 | 67.7 | 67.7 | ||||
| Total impulse (vac) | MN*s | 2.18 | 2.18 | 2.18 | ||||
|
Stage 2 |
Name | Orion 50 | Orion 50 | Orion 50XL | ||||
| Length | m | 2.04 (2.85) | 2.04 (2.85) | 2.19 (3.00) | ||||
| Diameter | m | 1.27 | 1.27 | 1.27 | ||||
| Liftoff weight | t | 3.379 | 3.379 | 4.342 | ||||
| Propellant weight | t | 3.025 | 3.025 | 3.924 | ||||
| Engines | ATK | ATK | ATK | |||||
| Propellant | solid HTPB | solid HTPB | solid HTPB | |||||
| Total thrust (vac) | kN | 114.6 (av) | 114.6 (av) | 160.6 (av) | ||||
| Specific impulse (vac) | N*s/kg | 2865 | 2865 | 2855 | ||||
| Burn time | s | 75.6 | 75.6 | 69.7 | ||||
| Total impulse (vac) | MN*s | 8.7 | 8.7 | 11.2 | ||||
|
Stage 1 |
Name | Orion 50S | Orion 50S | Orion 50SXL | ||||
| Length | m | 8.98 | 8.98 | 10.34 | ||||
| Diameter | m | 1.27 | 1.27 | 1.27 | ||||
| Liftoff weight | t | 14.020 | 14.020 | 16.386 | ||||
| Propellant weight | t | 12.163 | 12.163 | 15.024 | ||||
| Engines | ATK | ATK | ATK | |||||
| Propellant | solid HTPB | solid HTPB | solid HTPB | |||||
| Total thrust (s.l.) | kN | 500.0 (max) | 500.0 (max) | 647.5 (max) | ||||
| Specific impulse (s.l.) | N*s/kg | 2590 | 2590 | 2591 | ||||
| Burn time | s | 75.3 | 75.3 | 69.1 | ||||
| Total impulse (vac) | MN*s | 35.0 | 35.0 | 43.3 | ||||