# Vega 2 Balloon

> constant-pressure instrumented balloon aerostat was deployed from the upper heat protection hemisphere of each if the two Vega lander craft immediately after entry into the atmosphere

**Wikidata**: [Q113129981](https://www.wikidata.org/wiki/Q113129981)  
**Source**: https://4ort.xyz/entity/vega-2-balloon

## Summary
The Vega 2 Balloon was a constant-pressure instrumented balloon aerostat deployed from the Vega 2 lander craft. It was released immediately after the lander's entry into the atmosphere. Classified as a space probe, it was launched aboard a Proton-K rocket from the Baikonur Cosmodrome.

## Key Facts
- **Classification:** Instance of a space probe; described as a constant-pressure instrumented balloon aerostat.
- **Launch Date:** December 21, 1984.
- **Launch Vehicle:** Proton-K (a Russian, previously Soviet, carrier rocket).
- **Launch Site:** Baikonur Cosmodrome.
- **COSPAR ID:** 1984-128F.
- **NSSDCA ID:** 1984-128F.
- **Deployment:** Deployed from the upper heat protection hemisphere of the Vega lander craft immediately following atmospheric entry.
- **Associated Mission:** Has part(s) identified as Vega 2.
- **Satellite Catalog Number (SCN):** 15857.

## FAQs
### Q: What type of device is the Vega 2 Balloon?
A: It is a constant-pressure instrumented balloon aerostat. It is technically classified as a space probe, which is an unmanned robotic spacecraft designed to explore outer space.

### Q: How was the Vega 2 Balloon deployed?
A: The balloon was deployed from the upper heat protection hemisphere of the Vega lander craft. This occurred immediately after the craft entered the atmosphere.

### Q: When and how was the Vega 2 Balloon launched?
A: It launched on December 21, 1984, using a Proton-K carrier rocket from the Baikonur Cosmodrome.

## Why It Matters
The Vega 2 Balloon represents a specialized application of space probe technology, specifically utilizing an aerostat design for atmospheric exploration. As an unmanned robotic spacecraft, its deployment highlights a complex engineering method where the instrumented balloon is released from the protective housing of a lander craft immediately upon atmospheric entry. This approach allows for the deployment of constant-pressure instruments directly into the atmospheric environment.

Launched as part of the broader Vega program (specifically associated with Vega 2), the mission utilized the robust Proton-K rocket, a staple of Soviet and Russian space infrastructure. The mission contributes to the catalog of deep space exploration efforts recorded under international identifiers such as COSPAR and NSSDCA. The deployment mechanism—integrating a balloon aerostat within a lander's heat shield—demonstrates a specific technical solution for delivering scientific instruments into an atmosphere.

## Notable For
- Being a **constant-pressure instrumented balloon aerostat** deployed in an extraterrestrial context.
- Utilizing a unique **deployment mechanism** from the upper heat protection hemisphere of a lander craft.
- Launching aboard a **Proton-K** carrier rocket.
- Being part of the **Vega 2** mission infrastructure.
- Sharing the specific international designator **1984-128F** for both COSPAR and NSSDCA identification.

## Body
### Mission Profile and Deployment
The Vega 2 Balloon was a component of the Vega 2 mission hardware. Described as a constant-pressure instrumented balloon aerostat, its operational life began with a specific deployment sequence. It was housed within the upper heat protection hemisphere of the Vega lander craft. The deployment trigger was the moment of the craft's entry into the atmosphere, at which point the aerostat was immediately released.

### Launch and Technical Specifications
The mission originated from the Baikonur Cosmodrome. The launch took place on December 21, 1984, utilizing a Proton-K carrier rocket. The Proton-K is identified as a Russian (formerly Soviet) expendable launch system used for various space missions.

In global space tracking databases, the Vega 2 Balloon is cataloged with specific identifiers:
- **Satellite Catalog Number (SCN):** 15857
- **COSPAR ID:** 1984-128F
- **NSSDCA ID:** 1984-128F

### Classification
Structurally and functionally, the entity is classified as a **space probe**. In the context of the provided knowledge, a space probe is defined as an unmanned robotic spacecraft that does not orbit Earth but instead explores further into outer space. The Vega 2 Balloon is also aliased as "15857" and "Vega2Balloon" in data sources.

## References

1. Jonathan's Space Report