Launch success
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United Launch AllianceLaunch Successful
NROL-91
Delta IV Heavy
Historical mission record
This page records Delta IV Heavy | NROL-91 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: Launch Library ↗ · Flight Club ↗
The latest on this mission
What changed?
Liftoff of the final Delta IV Heavy from Vandenberg Space Force Base.
New T-0 of 22:25:30 UTC
Mission status
Launch Successful
Status reported by the mission data provider.
LAUNCH SITEVandenberg SFB, CA, USA
Mission
Classified payload for the US National Reconnaissance Office (NRO).
- Launch vehicle
- Delta IV Heavy
- Mission type
- Government/Top Secret
- Destination orbit
- Low Earth Orbit
- Launch pad
- Space Launch Complex 6
- Provider
- United Launch Alliance
The vehicle
Published configuration and flight history.
Launch vehicle
Delta IV Heavy
The Delta IV Heavy (Delta 9250H) is an expendable heavy-lift launch vehicle, the largest type of the Delta IV family, and is the world's second highest-capacity rocket in operation. It is manufactured by United Launch Alliance and was first launched in 2004.
- Height
- 72 m
- Diameter
- 5 m
- Stages
- 2
- Recorded launches
- 16
- First flight
- 2004-12-21
Recorded timing
This is a mission record, not an upcoming calendar appointment.
2h 22m windowPublished target
WINDOW OPENS
WINDOW CLOSES
Target ·
The target marker shows its position within the published window. The schedule may change before launch.
Launch site & orbit
Vandenberg SFB, CA, USA
The mission in perspective
Launch site & orbit
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Understand this orbit
Coverage & sources
Links supplied by the mission data provider.
Coverage and times may change.
Mission coverage
Sept. 24 Live Broadcast: Delta IV Heavy NROL-91 ↗Explore on iPhone
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