UNITED LAUNCH ALLIANCE
Atlas V 401 | CLIO (USA-257)
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Sep 17, 2014 at 00:10 UTC
▸ Flight profile›
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Source
PADSpace Launch Complex 41
SITECape Canaveral SFS, FL, USA →ORBITGeostationary Transfer Orbit
TYPEGovernment/Top Secret
MISSION OVERVIEW
CLIO is a secret satellite procured by an unidentified US Government Agency from Lockheed Martin. The satellite is likely based on a commercial A2100A bus. Purpose and mission is not known.
LAUNCH DETAILS
VEHICLE
Atlas V 401AGENCY
United Launch AllianceMISSION
CLIO
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Geostationary Transfer Orbit
LAUNCH PAD
Space Launch Complex 41LAUNCH SITE
Cape Canaveral SFS, FL, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 75eb464a-1216-42db-bf41-630a41a7355d
Reported date: Sep 17, 2014 at 00:10 UTC
Last synced: 1 minute ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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VEHICLE — Atlas V 401 →
MANUFACTURER
United Launch Alliance
VARIANT
401
FLIGHTS
41
SUCCESSES
41
SUCCESS RATE
100%
An Atlas V with a 4 meter diameter fairing, no boosters and a single centaur upper stage engine.
LAUNCH VIDEOS
ARTICLES & COVERAGE
FREQUENTLY ASKED QUESTIONS
When is the Atlas V 401 | CLIO (USA-257) launch?
The Atlas V 401 | CLIO (USA-257) is scheduled for Wednesday, September 17, 2014 at 12:10 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for CLIO?
The Atlas V 401 | CLIO (USA-257) mission uses the Atlas V 401 rocket, manufactured by United Launch Alliance. The Atlas V 401 has flown 41 times with a 100% success rate.
Where is the Atlas V 401 | CLIO (USA-257) launching from?
The launch takes place from Space Launch Complex 41 at Cape Canaveral SFS, FL, USA.
What orbit is CLIO going to?
The CLIO mission is targeting Geostationary Transfer Orbit.
Who is launching CLIO?
The Atlas V 401 | CLIO (USA-257) is operated by United Launch Alliance.
Can I watch the Atlas V 401 | CLIO (USA-257) launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
LAUNCH TIMELINE
Mar 29, 2026 00:03 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 29, 2026 00:03 UTC
Launch date set: Sep 17, 2014 at 00:10 UTC
NET (No Earlier Than) confirmed by United Launch Alliance
Mar 29, 2026 00:03 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 1 minute ago
●Launch Library 21 minute ago
Launch ID: 75eb464a-1216-42db-bf41-630a41a7355d
●Open-Meteo Weather1 day ago
Pad weather at 28.58, -80.58
Mission Profile
CLIO was a Atlas V 401 mission operated by United Launch Alliance that lifted off from Space Launch Complex 41, Cape Canaveral SFS, FL, USA on September 17, 2014. The flight carried its payload on a government/top secret mission to Geostationary Transfer Orbit. The launch was a success.