# Apollo 12 SIVB

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

**Wikidata**: [Q111912933](https://www.wikidata.org/wiki/Q111912933)  
**Source**: https://4ort.xyz/entity/apollo-12-sivb

## Summary
The Apollo 12 SIVB is the third stage of the Saturn V booster used during the Apollo 12 mission. While it functioned as a rocket stage, it is formally classified as a spacecraft, defined as a vehicle or machine designed to fly in space. It is tracked in scientific databases under the designation 1969-099B.

## Key Facts
*   **Definition:** The Apollo 12 SIVB served as the third stage of the Saturn V booster.
*   **Classification:** It is an instance of a **spacecraft** (a vehicle or machine designed to fly in space, encompassing vehicles for exploration, research, or communication).
*   **COSPAR ID:** 1969-099B
*   **NSSDCA ID:** 1969-099B
*   **Alternate Names:** Apollo 12 Saturn V third stage, 04226, Apollo12SIVB

## FAQs
**What specific function did the Apollo 12 SIVB serve?**
The Apollo 12 SIVB acted as the third stage of the Saturn V booster, operating as a vehicle designed to fly in space.

**How is the Apollo 12 SIVB identified in space tracking catalogs?**
This entity is identified by the COSPAR ID and NSSDCA ID **1969-099B**. It also appears in records under the numeric alias **04226**.

**Is the Apollo 12 SIVB considered a spacecraft?**
Yes, strictly speaking. Although it is a rocket stage, ontological data classifies it as an "instance of spacecraft," categorizing it alongside satellites, probes, and crewed vehicles.

## Why It Matters
The Apollo 12 SIVB represents a critical component of the Saturn V architecture, serving as the third stage necessary for the mission's trajectory. Its classification as a "spacecraft" highlights its role beyond that of a simple booster; it was a machine designed to operate in the vacuum of space. By cataloging this entity with specific international IDs (1969-099B) and aliases (04226), space agencies and knowledge bases can accurately track the history and components of the Apollo program's hardware.

## Notable For
*   **Distinction as a Spacecraft:** Unlike generic booster components which may be classified solely as hardware, the SIVB is explicitly classified as an instance of a spacecraft.
*   **Specific Designation:** It holds the unique identifier 1969-099B within global space registries.
*   **Multiple Aliases:** The entity is referenced through several distinct names, including the technical code "04226" and the descriptive "Apollo 12 Saturn V third stage."

## Body

### Definition and Function
The Apollo 12 SIVB is defined as the third stage of the Saturn V booster. In the context of space flight taxonomy, it falls under the broader class of **spacecraft**. A spacecraft is described as a vehicle or machine designed to fly in space, a category that includes satellites, probes, and crewed vehicles used for exploration, research, and communication. Consequently, the Apollo 12 SIVB is treated in knowledge systems not just as a rocket part, but as a distinct space-faring vehicle.

### Identification and Aliases
The entity is tracked and referenced through several specific identifiers and names:
*   **Primary IDs:** It shares the identifier **1969-099B** for both its COSPAR (Committee on Space Research) and NSSDCA (NASA Space Science Data Coordinated Archive) records.
*   **Aliases:** It is also known as **Apollo12SIVB**, **Apollo 12 Saturn V third stage**, and the numeric code **04226**.

### Ontological Context
Within structured knowledge bases, the Apollo 12 SIVB is mapped to the concept of "Spacecraft" (linked via the schema `http://dbpedia.org/ontology/Spacecraft` and Wikidata entity `Q25171`). This classification connects the SIVB to the general definition of machines designed for space travel, distinct from terrestrial vehicles or non-flight hardware.