# Tansei 3
**Wikidata**: [Q11271450](https://www.wikidata.org/wiki/Q11271450)  
**Source**: https://4ort.xyz/entity/tansei-3

## Summary
Tansei 3 (designated MS-T3) was a Japanese technology demonstration spacecraft launched on February 19, 1977. It was utilized to test and demonstrate experimental technologies in space. The spacecraft was launched aboard an M-3H rocket from the Uchinoura Space Center.

## Key Facts
- **Official Name:** Tansei 3 (also known as MS-T3 and たんせい3).
- **Classification:** Technology demonstration spacecraft.
- **Launch Date:** February 19, 1977.
- **Launch Site:** Uchinoura Space Center.
- **Launch Vehicle:** M-3H (a Japanese launch vehicle).
- **COSPAR ID:** 1977-012A.
- **Satellite Catalog Number:** 09841.
- **Significant Event:** Rocket launch occurring on February 19, 1977, at the Uchinoura Space Center.
- **Google Knowledge Graph ID:** /g/12384q35.

## FAQs
### Q: What was Tansei 3?
A: Tansei 3 was a technology demonstration spacecraft used to demonstrate experimental technologies in space. It is also identified by the code name MS-T3.

### Q: When and where was Tansei 3 launched?
A: Tansei 3 was launched on February 19, 1977, from the Uchinoura Space Center.

### Q: What rocket was used to launch Tansei 3?
A: The spacecraft was launched using an M-3H launch vehicle, which is a Japanese rocket.

## Why It Matters
Tansei 3 serves as a specific historical example of Japan's efforts in space exploration during the late 1970s. As a technology demonstration spacecraft, its primary role was to validate experimental technologies, a critical step in the development of reliable space infrastructure. By utilizing the M-3H launch vehicle, the mission contributed to the operational history of Japan's indigenous rocket development program. The mission is documented under the COSPAR ID 1977-012A and serves as a data point for researchers studying the timeline of spacecraft launched from the Uchinoura Space Center.

## Notable For
- Being a distinct instance of a **technology demonstration spacecraft**.
- Launching aboard the **M-3H**, a Japanese launch vehicle.
- Being tracked under the specific **COSPAR ID 1977-012A**.
- Operating under the alias **MS-T3**.

## Body
### Identity and Classification
Tansei 3 is formally classified as a technology demonstration spacecraft. In this role, it functioned as a platform for demonstrating experimental technologies. The entity holds the Satellite Catalog Number 09841 and is referenced in the Wolfram Language as `Entity["Satellite", "09841"]`.

### Launch and Mission Details
The spacecraft's significant event was a rocket launch that took place on February 19, 1977. The launch originated from the Uchinoura Space Center. The vehicle used to propel Tansei 3 into space was the M-3H, a class of Japanese launch vehicle.

### Aliases and Identifiers
The spacecraft is referred to by several identifiers across different databases:
*   **Aliases:** MS-T3, たんせい3
*   **COSPAR ID:** 1977-012A
*   **Google Knowledge Graph ID:** /g/12384q35

Information regarding this entity is available in Japanese and Hungarian Wikipedia entries.

## References

1. Jonathan's Space Report