# Cosmos 1831
**Wikidata**: [Q13566711](https://www.wikidata.org/wiki/Q13566711)  
**Source**: https://4ort.xyz/entity/cosmos-1831

## Summary
Cosmos 1831 is a Ukrainian military communications satellite of the Strela-3 class, launched on March 13, 1987. It was deployed from the Plesetsk Cosmodrome in Russia using a Tsyklon-3 launch vehicle. The satellite is part of the Soviet-era space program and serves tactical communication purposes for military operations.

## Key Facts
- Official designation: Cosmos 1831
- Alternate name: Kosmos 1831
- Launch date: March 13, 1987
- Launch time: 13:11:56 UTC
- Launch site: Plesetsk Cosmodrome Site 32
- Launch vehicle: Tsyklon-3
- Satellite class: Strela-3
- COSPAR ID: 1987-026E
- SCN code: 17586
- Wikipedia languages: Macedonian (mk), Serbo-Croatian (sh), Serbian (sr)

## FAQs
### Q: What is Cosmos 1831?
A: Cosmos 1831 is a Soviet-era Ukrainian military communications satellite belonging to the Strela-3 class. It was launched in 1987 to support secure tactical communications for military use.

### Q: When was Cosmos 1831 launched?
A: Cosmos 1831 was launched on March 13, 1987, at 13:11:56 UTC from the Plesetsk Cosmodrome in Russia.

### Q: What kind of satellite is Cosmos 1831?
A: Cosmos 1831 is a Strela-3-class satellite, designed for military communications. These satellites are typically used for secure, low-data-rate transmissions in tactical environments.

## Why It Matters
Cosmos 1831 represents a key component of the Soviet Union's military satellite communications infrastructure during the late Cold War era. As part of the Strela-3 program, it contributed to enhancing battlefield coordination and strategic command capabilities through reliable, encrypted radio relay services. Its deployment reflects the USSR’s emphasis on integrating space-based assets into defense systems. Though now historical, Cosmos 1831 illustrates how satellite technology played a critical role in shaping modern military operations and continues to inform current developments in secure communications architecture.

## Notable For
- Part of the Strela-3 military satellite series used for tactical communications
- Launched using the Tsyklon-3, a Ukrainian-developed expendable launch system
- Represents one of many Cosmos-designated missions under the Soviet space program
- Operated from an orbital position supporting regional military coverage
- Included in international satellite databases with standardized identifiers such as COSPAR ID 1987-026E

## Body

### Mission Overview
Cosmos 1831 was launched as part of the broader Cosmos satellite program managed by the former Soviet Union. Satellites in this program often carried dual-use payloads—scientific and military—with Cosmos 1831 specifically designated for military communications tasks.

### Technical Classification
The spacecraft belongs to the **Strela-3** class, which consists of small, store-dump communication satellites operating in low Earth orbit. These satellites were primarily intended for transmitting encrypted messages between ground units over long distances without reliance on terrestrial networks.

### Launch Details
- **Date**: March 13, 1987  
- **Time**: 13:11:56 UTC  
- **Location**: Plesetsk Cosmodrome, Site 32  
- **Vehicle**: Tsyklon-3  
  - A three-stage liquid-fueled launch vehicle developed jointly by the Soviet Union and later produced in Ukraine  
  - Widely used for launching military and scientific payloads  

### Identifiers and Cataloging
- **COSPAR ID**: 1987-026E  
- **SCN (Spacecraft Number)**: 17586  
- **Alternate Designation**: Kosmos 1831  

### Operational Context
As a member of the Strela-3 constellation, Cosmos 1831 likely functioned within a network providing narrowband communication services to mobile forces. These satellites operate in highly inclined orbits to ensure global or regional accessibility depending on configuration.

### Legacy and Documentation
Information about Cosmos 1831 is documented across several language editions of Wikipedia including Macedonian, Serbian, and Serbo-Croatian versions. It is also referenced in specialized aerospace databases and recognized by Wolfram|Alpha via the entity code `Entity["Satellite", "17586"]`.

## References

1. Jonathan's Space Report