Watch the Launch

Additional Media

Atlas V SILENTBARKER

A United Launch Alliance (ULA) Atlas V 551 rocket is launching the SILENTBARKER/NROL-107 mission, a joint National Reconnaissance Office (NRO) and U.S. Space Force (USSF) capability to improve space domain awareness. Liftoff will occur from Space Launch Complex-41 at Cape Canaveral Space Force Stati...

Atlas V SILENTBARKER / NROL-107 Mission Profile

A United Launch Alliance (ULA) Atlas V 551 rocket is launching the SILENTBARKER/NROL-107 mission, a joint National Reconnaissance Office (NRO) and U.S. Space...

> Launches > launch-nrol-107

United Launch Alliance’s Atlas V rockets have delivered vital national security missions accross the globe since 2002. The Atlas V configuration is comprised of a common booster core (CBC), a Centaur upper stage, and a 5-meter-diameter payload fairing (PLF). This Atlas employs four additional solid ...

NROL-107 (Silent Barker)

Circle Image

Overview

Destination: Geostationary Orbit
Mission: Government/Top Secret

Geostationary Orbit Space Launch Complex 41 Cape Canaveral, FL, USA Probability: 90% #SILENTBARKER

Classified space situational awareness (SSA) payload for the US National Reconnaissance Office (NRO).

Telemetry

Launch trajectory and telemetry simulations provided by Flight Club - a rocket launch simulator and orbital trajectory visualiser for all things space!

Updates

Nosu • Sept. 10, 2023, 7:25 p.m.

Launch success confirmed


Nosu • Sept. 10, 2023, 12:47 p.m.

Liftoff


LL2 • Sept. 10, 2023, 12:29 p.m.

Livestream has started


Atlas V 551

Family:
Configuration: 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.

Specifications
  • Minimum Stage
    1
  • Max Stage
    2
  • Length
    59.7 m
  • Diameter
    3.8 m
  • Fairing Diameter
    5.4 m
  • Launch Mass
    573 T
  • Thrust
    12269 kN
Family
  • Name
    Atlas V 551
  • Family
  • Variant
    551
  • Alias
  • Full Name
    Atlas V 551
Payload Capacity
  • Launch Cost
    $153000000
  • Low Earth Orbit
    18850 kg
  • Geostationary Transfer Orbit
    8890 kg
  • Direct Geostationary
    3850 kg
  • Sun-Synchronous Capacity

United Launch Alliance

United Launch Alliance

(ULA)

CEO: Tory Bruno Founded: 2006 Successes: 161 Failures: 0 Pending: 45

Agency Type:

United Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.

INFO WIKI

Related News

SpaceNews

ULA’s Atlas 5 launches National Reconnaissance Office mission

A National Reconnaissance Office mission flew to geostationary Earth orbit Sept. 10 aboard a United Launch Alliance Atlas 5 rocket.

NASASpaceflight

ULA conducts NROL-107 launch, last Atlas NRO mission

United Launch Alliance (ULA) launched its Atlas V with the classified NROL-107 Silent Barker mission set on Sunday, following several days, including a rollback due to a hurricane threat.

Teslarati

United Launch Alliance readies for first Atlas V launch of the year

The Atlas V launch has been delayed for safety precautions in order to shield the rocket and payload from any effects of...

SpacePolicyOnline.com

SILENTBARKER To Be U.S. “Watchdog” in Geosynchronous Orbit

Weather permitting, tomorrow the United States will launch the first satellites in a new system to keep track of what is happening in geosynchronous orbit. How many satellites are aboard […]

NASASpaceflight

ULA delays NROL-107 launch, last Atlas NRO mission

United Launch Alliance (ULA) has called off its Atlas V launch of the classified NROL-107 Silent Barker mission set for Tuesday. ULA noted that “out of an abundance of caution for personnel safety, a critical national security payload, and…

Cape Canaveral, FL, USA

Space Launch Complex 41


Electron
Success
2 days, 9 hours ago
Ready, Aim, PREFIRE (PREFIRE 1)
Rocket Lab Launch Complex 1B - Onenui Station, Mahia Peninsula, New Zealand

First 6U Cubesat carrying a miniaturized IR spectrometer, covering 0- 45 μm at 0.84 μm spectral resolution, operating for one seasonal cycle for NASA…


Falcon 9
Success
3 days, 14 hours ago
Starlink Group 6-63
Launch Complex 39A - Kennedy Space Center, FL, USA

A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Falcon 9
Success
4 days, 14 hours ago
Starlink Group 6-62
Space Launch Complex 40 - Cape Canaveral, FL, USA

A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Falcon 9
Success
5 days, 9 hours ago
NROL-146
Space Launch Complex 4E - Vandenberg SFB, CA, USA

First batch of satellites for a reconnaissance satellite constellation built by SpaceX and Northrop Grumman for the National Reconnaissance Office to…


Kuaizhou-11
Success
6 days, 12 hours ago
Wuhan-1 and others
Launch Area 95A - Jiuquan Satellite Launch Center, People's Republic of China

Carried 4 satellites to SSO: * Wuhan-1 * Chutian 001 * Tianyan 22 * Lingque-3 01


Long March 2D
Success
1 week ago
Beijing 3C
Launch Complex 9 - Taiyuan Satellite Launch Center, People's Republic of China

Commercial optical Earth observation constellation of 4 satellites for 21AT (Twenty First Century Aerospace Technology Company Ltd).


New Shepard
Success
1 week, 1 day ago
NS-25
West Texas Suborbital Launch Site/ Corn Ranch - Corn Ranch, Van Horn, TX, USA

Twenty-fifth flight of New Shepard carrying six passengers.


Falcon 9
Success
1 week, 2 days ago
Starlink Group 6-59
Space Launch Complex 40 - Cape Canaveral, FL, USA

A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Soyuz 2.1b/Fregat-M
Success
1 week, 3 days ago
Kosmos 2576
43/4 (43R) - Plesetsk Cosmodrome, Russian Federation

Russian military payload of unknown purposes. Hitchhiking Payloads: SITRO-AIS 53-56; Zorkiy-2M-4 & 6


Falcon 9
Success
1 week, 5 days ago
Starlink Group 8-7
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 20 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.