# Cosmos 811
**Wikidata**: [Q12907811](https://www.wikidata.org/wiki/Q12907811)  
**Source**: https://4ort.xyz/entity/cosmos-811

## Summary
Cosmos 811 is a Soviet satellite launched on March 31, 1976, as part of the Zenit-4MT class reconnaissance program. It was deployed from the Plesetsk Cosmodrome using a Soyuz-M rocket. The satellite is identified by COSPAR ID 1976-030A and SCN number 08781.

## Key Facts
- Official designation: Cosmos 811
- Alternate name: Kosmos 811
- Launch date: March 31, 1976
- Launch time: 12:50:03 UTC
- Launch site: Plesetsk Cosmodrome Site 41
- Launch vehicle: Soyuz-M
- Satellite class: Zenit-4MT
- Country of origin: Soviet Union
- COSPAR ID: 1976-030A
- SCN number: 08781

## FAQs
### Q: What type of satellite is Cosmos 811?
A: Cosmos 811 is a Zenit-4MT reconnaissance satellite developed by the Soviet Union. It was designed for military imaging and intelligence-gathering purposes.

### Q: When and where was Cosmos 811 launched?
A: Cosmos 811 was launched on March 31, 1976, at 12:50:03 UTC from Plesetsk Cosmodrome Site 41 in the Soviet Union.

### Q: What rocket was used to launch Cosmos 811?
A: The satellite was launched using a Soyuz-M carrier rocket, a variant of the widely used Soyuz launch system developed by the Soviet Union.

## Why It Matters
Cosmos 811 represents a key component of the Soviet Union's Cold War-era space-based reconnaissance capabilities. As part of the Zenit-4MT program, it contributed to the USSR’s strategic intelligence operations through high-resolution Earth observation. These missions played a critical role in geopolitical monitoring and were instrumental in maintaining military balance during the latter half of the 20th century. Its successful deployment demonstrated advancements in orbital imaging technology and solidified the USSR's position in the global space race.

## Notable For
- Part of the classified Zenit-4MT military reconnaissance satellite series
- Launched using the reliable Soyuz-M rocket, showcasing Soviet launch capabilities
- One of multiple Cosmos-designated satellites that formed the backbone of Soviet orbital surveillance
- Represents a mid-1970s advancement in Soviet optical reconnaissance technology
- Identified with international tracking identifiers such as COSPAR ID 1976-030A and SCN 08781

## Body
### Mission Overview
Cosmos 811 was a Soviet military reconnaissance satellite belonging to the Zenit-4MT class. Satellites in this class were typically used for photographic surveillance and intelligence collection. The mission was conducted under the Soviet space program's standard practice of assigning the "Cosmos" name to various low-Earth orbit missions.

### Launch Details
The satellite was launched on **March 31, 1976**, at **12:50:03 UTC** from **Plesetsk Cosmodrome Site 41**, located in the Arkhangelsk Oblast of the Soviet Union. The launch utilized a **Soyuz-M** rocket, a modified version of the original Soyuz launcher optimized for military payloads.

### Technical Classification
- **Instance of**: Zenit-4MT class satellite
- **Launch Vehicle**: Soyuz-M
- **Country of Origin**: Soviet Union
- **COSPAR ID**: 1976-030A
- **SCN Number**: 08781

### Operational Context
As part of the broader Cosmos program, Cosmos 811 followed the convention of using incremental numerical designations to obscure the true purpose of individual launches. The Zenit-4MT class was known for its improved resolution and film-return systems compared to earlier models like the Zenit-2.

### International Identifiers
The satellite is tracked internationally via:
- **COSPAR ID**: 1976-030A
- **SCN (Spacecraft Number)**: 08781
- **Google Knowledge Graph ID**: /g/121l0yr0
- **Wolfram Language Entity Code**: Entity["Satellite", "08781"]

### Related Entities
- **Zenit-4MT**: The spacecraft class to which Cosmos 811 belongs
- **Soyuz-M**: The launch vehicle used for deployment
- **Plesetsk Cosmodrome Site 41**: The launch facility

### Available Language Coverage
Wikipedia articles exist in the following languages:
- Hungarian (hu)
- Macedonian (mk)
- Serbo-Croatian (sh)
- Serbian (sr)

## References

1. Jonathan's Space Report