SOVIET SPACE PROGRAM
Soyuz U | Kosmos 638
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Apr 3, 1974 at 07:30 UTC
▸ Flight profile›
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LAUNCH DETAILS
VEHICLE
Soyuz UAGENCY
Soviet Space ProgramLAUNCH PAD
31/6LAUNCH SITE
Baikonur Cosmodrome, Republic of KazakhstanPROGRAM
Soyuz
COUNTRY
RUS
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 20f2d134-54d6-4492-b61d-a8e5a51bb472
Reported date: Apr 3, 1974 at 07:30 UTC
Last synced: 15 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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SOYUZ — SOYUZ 7K-TM NO.71
Soyuz 7K-TM 11F615A12 #71SERIAL
1FLIGHTS
Low Earth OrbitDESTINATION
Single UseSTATUS
Apollou2013Soyuz Test Project version of the Soyuz spacecraft
VEHICLE — Soyuz U →
MANUFACTURER
Russian Federal Space Agency (ROSCOSMOS)
FLIGHTS
714
SUCCESSES
694
SUCCESS RATE
97.2%
FREQUENTLY ASKED QUESTIONS
When is the Soyuz U | Kosmos 638 launch?
The Soyuz U | Kosmos 638 is scheduled for Wednesday, April 3, 1974 at 7:30 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 Soyuz U | Kosmos 638?
The Soyuz U | Kosmos 638 mission uses the Soyuz U rocket, manufactured by Russian Federal Space Agency (ROSCOSMOS). The Soyuz U has flown 714 times with a 97.2% success rate.
Where is the Soyuz U | Kosmos 638 launching from?
The launch takes place from 31/6 at Baikonur Cosmodrome, Republic of Kazakhstan.
Who is launching Soyuz U | Kosmos 638?
The Soyuz U | Kosmos 638 is operated by Soviet Space Program. It is part of the Soyuz program.
Can I watch the Soyuz U | Kosmos 638 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 28, 2026 21:45 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 21:45 UTC
Launch date set: Apr 3, 1974 at 07:30 UTC
NET (No Earlier Than) confirmed by Soviet Space Program
Mar 28, 2026 21:45 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 15 minutes ago
●Launch Library 215 minutes ago
Launch ID: 20f2d134-54d6-4492-b61d-a8e5a51bb472
●Open-Meteo Weather4 days ago
Pad weather at 46, 63.56
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Mission Profile
Soyuz U | Kosmos 638 was a Soyuz U mission operated by Soviet Space Program that lifted off from 31/6, Baikonur Cosmodrome, Republic of Kazakhstan on April 3, 1974. It was flown as part of the Soyuz program. The launch was a success.