# Apollo 14 SIVB

> The Apollo Saturn V SIVB was the third stage of the Saturn V booster.

**Wikidata**: [Q111912936](https://www.wikidata.org/wiki/Q111912936)  
**Source**: https://4ort.xyz/entity/apollo-14-sivb

## Summary
The Apollo 14 SIVB, also known as the Saturn V third stage, was the final propulsion element of the Saturn V rocket used in the Apollo 14 mission. It functioned as an upper stage in Earth orbit and later served as a spacecraft in its own right after being reignited for translunar trajectory insertion.

## Key Facts
- Official designation: Apollo 14 SIVB
- Alternate names: Apollo 14 Saturn V third stage, 04904, Apollo14SIVB
- COSPAR ID: 1971-008B
- NSSDCA ID: 1971-008B
- Instance of: spacecraft
- Part of: Saturn V launch vehicle
- Mission: Apollo 14
- Function: Third stage of the Saturn V booster; later operated as an independent spacecraft post-separation
- Wikidata description: The Apollo Saturn V SIVB was the third stage of the Saturn V booster

## FAQs

### What is the Apollo 14 SIVB?
The Apollo 14 SIVB is the third stage of the Saturn V rocket used in the Apollo 14 mission. It functioned as both a propulsion system during launch and later as a separate spacecraft during the mission's lunar trajectory phase.

### How is it classified?
It is classified as a spacecraft under the broader category of space vehicles designed to operate in outer space, with its own COSPAR and NSSDCA identifiers.

### What was its role in the Apollo 14 mission?
The SIVB provided the final boost needed to send the Apollo spacecraft toward the Moon. After separation, it was reignited to perform a burn that inserted the command and service module into a translunar trajectory.

### Is it still in space?
No, the Apollo 14 SIVB impacted the Moon as part of the mission profile. Its final maneuver involved crashing into the lunar surface to generate seismic data for scientific study.

### What makes it unique compared to other stages?
Unlike earlier stages that fall back to Earth, the SIVB was capable of functioning as an independent spacecraft after separation, including navigation, communication, and propulsion capabilities.

## Why It Matters
The Apollo 14 SIVB represents a critical component of human spaceflight history, enabling the successful journey to the Moon. Its design allowed for precise orbital mechanics and scientific data collection, including its intentional impact on the Moon's surface to study lunar seismology. As a spacecraft in its own right, it demonstrated the versatility of modular space systems and contributed to the technological foundation for future deep-space missions.

## Notable For
- Being the third stage of the Saturn V rocket used in the Apollo 14 mission
- Functioning as both a propulsion stage and an independent spacecraft
- Impacting the Moon intentionally to provide seismic data for scientific analysis
- Having a formal classification as a spacecraft with COSPAR and NSSDCA identifiers
- Demonstrating the capability for staged space vehicles to serve multiple roles

## Body

### Mission Context
The Apollo 14 SIVB was integral to the Apollo 14 mission, which launched on January 31, 1971. It served as the final stage of the Saturn V rocket, providing the necessary velocity to send the command and service modules on a translunar trajectory. After separation, it was maneuvered to impact the Moon, contributing to scientific research through controlled seismic activity.

### Design and Function
As the third stage of the Saturn V, the SIVB was equipped with a single J-2 engine capable of multiple restarts. This allowed it to perform a trans-lunar injection burn after separating from the main spacecraft. Its structure included fuel tanks, guidance systems, and communication equipment, enabling it to function autonomously post-separation.

### Operational Profile
Following its primary role in boosting the Apollo 14 spacecraft, the SIVB executed a controlled burn that sent it on a collision course with the Moon. This maneuver was not only a disposal method but also a scientific opportunity, as the impact generated measurable seismic waves studied by instruments left on the lunar surface by earlier Apollo missions.

### Classification and Identification
The Apollo 14 SIVB is formally recognized as a spacecraft, with the following identifiers:
- COSPAR ID: 1971-008B
- NSSDCA ID: 1971-008B
These designations indicate its status as a cataloged object in space databases, reflecting its operational autonomy beyond its initial role as a rocket stage.

### Legacy and Impact
The SIVB stage exemplifies the engineering ingenuity of the Apollo program, where even discarded components were repurposed for scientific gain. Its impact event contributed to lunar science, while its design influenced future spacecraft architecture concepts involving modular and reusable systems.

### Related Entities
- **Saturn V booster**: The full launch vehicle of which the SIVB was the third stage.
- **Apollo 14 mission**: The specific mission during which the SIVB was used.
- **Lunar seismology experiments**: Scientific objectives supported by the SIVB's controlled impact.
- **Spacecraft class**: The broader category under which the SIVB is classified, based on its operational capabilities in space.