Q: What type of spacecraft was Kosmos 638?

A: Kosmos 638 was a Soyuz 7K-TM spacecraft, a second-generation variant of the Soyuz series used between 1974 and 1976. It operated as an uncrewed spaceflight.

Q: When was Kosmos 638 launched and how long did it stay in orbit?

A: The spacecraft launched on April 3, 1974, and remained in orbit for 14,228 minutes (approximately 9.9 days) before landing on April 13, 1974.

Q: What rocket was used to launch Kosmos 638?

A: Kosmos 638 was launched using a Soyuz-U rocket, a universal design variant of the Soyuz rocket family.

Kosmos 638

USSR spacecraft

Event uncrewed_spaceflight Q1392129

Facts

18 properties

Instance of: uncrewed spaceflight, Soyuz 7K-TM^[2]
Launch date: 1974-04-03
Part of: Soyuz programme^[4]
Duration: 14,228 minute^[14]
Landing date: 1974-04-13
Launch vehicle: Soyuz-U
Mass: 6,570 kg^[15]
Operator: Soviet space program^[3]
Orbital inclination: 51.8 degree^[13]
Orbital period: 89.4 minute^[16]
Satellite of: low Earth orbit
Significant event: rocket launch, landing^[9]^[10]
Space launch vehicle: Soyuz-U^[5]
Start point: Baikonur Cosmodrome^[11]
Type of orbit: low Earth orbit^[6]
UTC date of spacecraft landing: April 13, 1974^[8]
UTC date of spacecraft launch: April 3, 1974^[7]
Vessel: Soyuz 7K-TM^[12]

🏷️ Also known as

en Kosmos 638 es Cosmos 638 fr Kosmos 638 hu Koszmosz–638 ja コスモス638号 ru Космос-638

🔖 Identifiers · 3

COSPAR ID: 1974-018A
Freebase ID: /m/0b7jzk
SCN: 07234

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🔗 Connections

Significant event 2

landing, rocket launch

Belongs to 1

Soyuz programme

Instance of 1

Soyuz 7K-TM

Operator 1

Soviet space program

Part of 1

Soyuz programme

Space launch vehicle 1

Soyuz-U

Start point 1

Baikonur Cosmodrome

Type of orbit 1

low Earth orbit

Vessel 1

Soyuz 7K-TM

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Summary

Kosmos 638 is an uncrewed spaceflight^[1].

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🌐 Available in 9 languages

enKosmos 638 csKosmos 638 deKosmos 638 esCosmos 638 huKoszmosz–638 itCosmos 638 jaコスモス638号 plKosmos 638 svKosmos 638

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

[2] ↑ Kosmos 638 — instance of (P31): Soyuz 7K-TM. Jonathan's Space Report. wikidata.org.
[3] ↑ Kosmos 638 — operator (P137): Soviet space program. wikidata.org.
[4] ↑ Kosmos 638 — part of (P361): Soyuz programme. wikidata.org.
[5] ↑ Kosmos 638 — space launch vehicle (P375): Soyuz-U. Jonathan's Space Report. wikidata.org.
[6] ↑ Kosmos 638 — type of orbit (P522): low Earth orbit. wikidata.org.
[7] ↑ Kosmos 638 — UTC date of spacecraft launch (P619): April 3, 1974. Jonathan's Space Report. wikidata.org.
[8] ↑ Kosmos 638 — UTC date of spacecraft landing (P620): April 13, 1974. wikidata.org.
[9] ↑ Kosmos 638 — significant event (P793): rocket launch. Jonathan's Space Report. wikidata.org.
[10] ↑ Kosmos 638 — significant event (P793): landing. wikidata.org.
[11] ↑ Kosmos 638 — start point (P1427): Baikonur Cosmodrome. Jonathan's Space Report. wikidata.org.
[12] ↑ Kosmos 638 — vessel (P1876): Soyuz 7K-TM. wikidata.org.
[13] ↑ Kosmos 638 — orbital inclination (P2045): 51.8 degree. wikidata.org.
[14] ↑ Kosmos 638 — duration (P2047): 14228 minutes. wikidata.org.
[15] ↑ Kosmos 638 — mass (P2067): 6570 kg. wikidata.org.
[16] ↑ Kosmos 638 — orbital period (P2146): 89.4 minutes. wikidata.org.

Class ancestry

[1] ↑ Kosmos 638 is an instance of uncrewed spaceflight (Q512399) [P31, primary]. Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Kosmos 638. Retrieved November 6, 2026, from https://4ort.xyz/entity/kosmos-638

MLA “Kosmos 638.” 4ort.xyz Knowledge Graph, 4ort.xyz, 6 Nov. 2026, https://4ort.xyz/entity/kosmos-638.

BibTeX

@misc{4ortxyz_kosmos-638_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Kosmos 638}}, year = {2026}, url = {https://4ort.xyz/entity/kosmos-638}, note = {Accessed: 2026-11-06}}

LLM prompt

According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Kosmos 638 — https://4ort.xyz/entity/kosmos-638 (retrieved 2026-11-06)

Canonical URL: https://4ort.xyz/entity/kosmos-638 · Last refreshed: November 6, 2026