Launch successful
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Historical mission record
This page records Atlas V 511 | USSF-8 and its reported outcome: Launch Successful. The date above is a historical record.
Source record updated . This is a source update, not a confirmed launch time.
Check the source: Atlas V USSF-8 ↗ · Launch Library ↗ · Flight Club ↗
Status reported by the mission data provider.
Mission
USSF-8 will launch two identical Geosynchronous Space Situational Awareness Program (GSSAP) satellites GSSAP-5 and GSSAP-6 directly to a near-geosynchronous orbit approximately 36,000 km above the equator. Data from the GSSAP will uniquely contribute to timely and accurate orbital predictions, further enabling space flight safety including satellite collision avoidance. Unique to this mission is the first and only planned flight of the Atlas V 511 configuration.
- Launch vehicle
- Atlas V 511
- Mission type
- Government/Top Secret
- Destination orbit
- Geosynchronous Orbit
- Launch pad
- Space Launch Complex 41
- Provider
- United Launch Alliance
The vehicle
Published configuration and flight history.

Atlas V 511
Atlas V is an expendable launch system in the Atlas rocket family. It was formerly operated by Lockheed Martin and is now operated by United Launch Alliance (ULA), a joint venture with Boeing. Each Atlas V rocket uses a Russian-built RD-180 engine burning kerosene and liquid oxygen to power its first stage and an American-built RL10 engine burning liquid hydrogen and liquid oxygen to power its Centaur upper stage. The RD-180 engines are provided by RD Amross, while Aerojet Rocketdyne provides both the RL10 engines and the strap-on boosters used in some configurations. The 511 version uses a 5m wide fairing, 1 solid rocket booster and one engine on the Centaur stage.
- Height
- 58.3 m
- Diameter
- 3.81 m
- Stages
- 2
- Recorded launches
- 1
- First flight
- 2022-01-21
Recorded timing
This is a mission record, not an upcoming calendar appointment.
Target ·
The target marker shows its position within the published window. The schedule may change before launch.
Launch site & orbit
Cape Canaveral SFS, FL, USA
Launch site
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Coverage & sources
Links supplied by the mission data provider.
Coverage and times may change.
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