SOVIET SPACE PROGRAM
Proton | US-KS 5
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Sep 13, 1991 at 17:51 UTC
▸ Flight profile›
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PAD81/23 (81L)
SITEBaikonur Cosmodrome, Republic of Kazakhstan →ORBITGeostationary Orbit
TYPEGovernment/Top Secret
MISSION OVERVIEW
Geostationary early warning satellite
LAUNCH DETAILS
VEHICLE
ProtonAGENCY
Soviet Space ProgramMISSION
US-KS 5
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Geostationary Orbit
LAUNCH PAD
81/23 (81L)LAUNCH SITE
Baikonur Cosmodrome, Republic of KazakhstanCOUNTRY
RUS
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: c6e310dc-45d0-4c9c-b74b-82362ac558c4
Reported date: Sep 13, 1991 at 17:51 UTC
Last synced: 20 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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VEHICLE — Proton →
MANUFACTURER
Khrunichev State Research and Production Space Center
VARIANT
K/DM-2
FLIGHTS
110
SUCCESSES
103
SUCCESS RATE
93.6%
FREQUENTLY ASKED QUESTIONS
When is the Proton | US-KS 5 launch?
The Proton | US-KS 5 is scheduled for Friday, September 13, 1991 at 5:51 PM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for US-KS 5?
The Proton | US-KS 5 mission uses the Proton rocket, manufactured by Khrunichev State Research and Production Space Center. The Proton has flown 110 times with a 93.6% success rate.
Where is the Proton | US-KS 5 launching from?
The launch takes place from 81/23 (81L) at Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit is US-KS 5 going to?
The US-KS 5 mission is targeting Geostationary Orbit.
Who is launching US-KS 5?
The Proton | US-KS 5 is operated by Soviet Space Program.
Can I watch the Proton | US-KS 5 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 03:06 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 29, 2026 03:06 UTC
Launch date set: Sep 13, 1991 at 17:51 UTC
NET (No Earlier Than) confirmed by Soviet Space Program
Mar 29, 2026 03:06 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 20 minutes ago
●Launch Library 220 minutes ago
Launch ID: c6e310dc-45d0-4c9c-b74b-82362ac558c4
●Open-Meteo Weather18 hours ago
Pad weather at 46.07, 62.98
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Mission Profile
US-KS 5 was a Proton K/DM-2 mission operated by Soviet Space Program that lifted off from 81/23 (81L), Baikonur Cosmodrome, Republic of Kazakhstan on September 13, 1991. The flight carried its payload on a government/top secret mission to Geostationary Orbit. The launch was a success.