Launch success confirmed
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NROL-107 (Silent Barker)
Atlas V 551
Historical mission record
This page records Atlas V 551 | NROL-107 (Silent Barker) 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 SILENTBARKER ↗ · Atlas V SILENTBARKER / NROL-107 Mission Profile ↗ · > Launches > launch-nrol-107 ↗
Status reported by the mission data provider.
Mission
Classified space situational awareness (SSA) payload for the US National Reconnaissance Office (NRO).
- Launch vehicle
- Atlas V 551
- Mission type
- Government/Top Secret
- Destination orbit
- Geostationary Orbit
- Launch pad
- Space Launch Complex 41
- Provider
- United Launch Alliance
The vehicle
Published configuration and flight history.

Atlas V 551
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 standard payload fairing sizes are 4 or 5 meters in diameter and of various lengths. Fairings sizes as large as 7.2 m in diameter and up to 32.3 m in length have been considered. The rocket is assembled in Decatur, Alabama and Harlingen, Texas.
- Height
- 59.7 m
- Diameter
- 3.8 m
- Stages
- 2
- Recorded launches
- 19
- First flight
- 2006-01-19
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.
Cumulus Cloud Rule
Launch site & orbit
Cape Canaveral SFS, FL, USA
Launch site & orbit
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Understand this orbit
Coverage & sources
Links supplied by the mission data provider.
Coverage and times may change.
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