# TETR 4
**Wikidata**: [Q2848196](https://www.wikidata.org/wiki/Q2848196)  
**Source**: https://4ort.xyz/entity/tetr-4

## Summary
TETR 4 was a spacecraft launched on September 29, 1971, from Cape Canaveral Space Launch Complex 17 using a Delta N launch vehicle. It is identified by the COSPAR designation 1971-083B and the spacecraft catalog number 05492. The satellite is documented in Portuguese and Galician Wikipedia and has a Google Knowledge Graph ID of /g/1pzpdhl61.

## Key Facts
- Launched on September 29, 1971, from Cape Canaveral Space Launch Complex 17
- Classified as a spacecraft and launched using a Delta N expendable launch vehicle
- COSPAR ID: 1971-083B
- Spacecraft catalog number: 05492
- Significant event: rocket launch at Cape Canaveral Space Launch Complex 17 on 1971-09-29
- Available in Portuguese (pt) and Galician (gl) Wikipedia languages
- Google Knowledge Graph ID: /g/1pzpdhl61
- Wolfram Language entity code: Entity["Satellite", "05492"]
- Has 2 sitelinks across Wikipedia language editions

## FAQs
### Q: What is TETR 4?
A: TETR 4 is a spacecraft launched on September 29, 1971, from Cape Canaveral Space Launch Complex 17 using a Delta N launch vehicle. It is identified by COSPAR designation 1971-083B and spacecraft catalog number 05492.

### Q: When and where was TETR 4 launched?
A: TETR 4 was launched on September 29, 1971, from Cape Canaveral Space Launch Complex 17 in Florida, United States.

### Q: What launch vehicle was used for TETR 4?
A: TETR 4 was launched using a Delta N expendable launch vehicle.

## Why It Matters
TETR 4 represents a specific mission in the history of space exploration, launched during a period of significant advancement in satellite technology and space operations. As a spacecraft launched from Cape Canaveral, it contributes to the extensive record of launches from this major spaceport. The use of the Delta N launch vehicle connects it to a family of reliable American expendable launch systems that have been instrumental in deploying numerous satellites and other spacecraft. Its documentation in multiple Wikipedia languages (Portuguese and Galician) indicates its relevance to international space research communities. The satellite's inclusion in major knowledge databases like Google Knowledge Graph and Wolfram Language demonstrates its established presence in space object catalogs and its accessibility for research and reference purposes.

## Notable For
- Launched from Cape Canaveral Space Launch Complex 17, a historic launch site
- Part of the Delta N launch vehicle program, contributing to the reliability record of this American launch system
- Documented in multiple Wikipedia language editions, showing international recognition
- Has established identifiers in major space object catalogs (COSPAR, spacecraft catalog)
- Included in major knowledge databases (Google Knowledge Graph, Wolfram Language)

## Body
### Launch Details
TETR 4 was launched on September 29, 1971, at 00:00 UTC from Cape Canaveral Space Launch Complex 17. This launch site, located on the east coast of Florida, has been a primary launch facility for the United States space program since the 1950s.

### Technical Specifications
The spacecraft was launched using a Delta N expendable launch vehicle, which was part of the Delta family of rockets developed by NASA and the aerospace industry. The Delta N variant was specifically designed for medium-lift capabilities and was commonly used for launching satellites into various orbits.

### Identification and Cataloging
TETR 4 is cataloged with the COSPAR designation 1971-083B, which follows the standard international system for identifying space objects. The spacecraft catalog number 05492 provides another standardized identifier used by space agencies and research institutions for tracking and referencing space objects.

### Documentation and Accessibility
The satellite is documented in both Portuguese (pt) and Galician (gl) Wikipedia editions, indicating its relevance to the Lusophone and Galician communities interested in space exploration. Its presence in major knowledge databases like Google Knowledge Graph (ID: /g/1pzpdhl61) and Wolfram Language (Entity["Satellite", "05492"]) ensures its accessibility for researchers, students, and the general public seeking information about space objects.

### Mission Context
While specific mission details are not provided in the source material, TETR 4's launch in 1971 places it in the context of the early 1970s space exploration era, a time when satellite technology was rapidly advancing and becoming increasingly important for communications, Earth observation, and scientific research.

## References

1. Jonathan's Space Report