# Cosmos 100
**Wikidata**: [Q4235057](https://www.wikidata.org/wiki/Q4235057)  
**Source**: https://4ort.xyz/entity/cosmos-100

## Summary
Cosmos 100, also known as Kosmos 100, was a Meteor-class satellite launched by the Soviet Union on December 17, 1965. With a mass of 3800 kilograms, it operated in orbit for over 36 years before its atmospheric entry on February 15, 2002.

## Key Facts
*   Cosmos 100 was launched on December 17, 1965.
*   It was classified as a Meteor-class satellite.
*   The satellite had a mass of 3800 kilograms.
*   Its launch vehicle was a Vostok-2M expendable carrier rocket.
*   Cosmos 100 was launched from Baikonur Cosmodrome Site 31.
*   It had a COSPAR ID of 1965-106A.
*   The satellite's orbital period was 97.57 minutes.
*   Its orbit had an apoapsis of 656 kilometres and a periapsis of 629 kilometres.
*   Cosmos 100 underwent atmospheric entry on February 15, 2002.

## FAQs
### Q: What was Cosmos 100?
A: Cosmos 100, also known as Kosmos 100, was a Meteor-class satellite. It was launched by the Soviet Union in 1965 and remained in orbit until 2002.

### Q: When was Cosmos 100 launched and what rocket was used?
A: Cosmos 100 was launched on December 17, 1965, at 02:20:00 UTC. It was carried into orbit by a Vostok-2M expendable carrier rocket from Baikonur Cosmodrome Site 31.

### Q: What was the mass of Cosmos 100?
A: Cosmos 100 had a mass of 3800 kilograms. This made it a substantial satellite for its time.

### Q: When did Cosmos 100 cease to operate or re-enter the atmosphere?
A: Cosmos 100 underwent atmospheric entry on February 15, 2002. This marked the end of its operational life after more than 36 years in orbit.

## Why It Matters
Cosmos 100 holds significance as a long-lived Meteor-class satellite launched by the Soviet Union. Its operational lifespan, extending from 1965 to 2002, demonstrates the durability and engineering prowess of early space technology. As part of the broader Cosmos series, it contributed to the Soviet Union's extensive satellite program, which encompassed various scientific, military, and meteorological objectives. While the specific mission details are not provided, its classification as a "Meteor" satellite suggests its role within a system designed for Earth observation or weather monitoring. The longevity of Cosmos 100 in orbit, spanning several decades, provides valuable data points for understanding orbital decay and the long-term behavior of space objects. Its existence underscores the continuous efforts in space exploration and satellite development during the Cold War era.

## Notable For
*   Its exceptionally long operational lifespan, remaining in orbit from its launch in 1965 until its atmospheric entry in 2002.
*   Being classified as a Meteor-class satellite, indicating its role within a specific series of Soviet spacecraft.
*   Its launch by the Soviet Union using a Vostok-2M expendable carrier rocket from Baikonur Cosmodrome.
*   Having a significant mass of 3800 kilograms, making it a substantial satellite for its time.

## Body

### Overview and Identification
Cosmos 100, also known by its alias Kosmos 100, was a satellite identified with the SCN value 01843 and the COSPAR ID 1965-106A. It was an instance of a Meteor-class satellite.

### Launch Details
Cosmos 100 was launched on December 17, 1965, at 02:20:00 UTC. The launch took place from Baikonur Cosmodrome Site 31, also referred to as Baikonur Cosmodrome. The satellite was carried into orbit by a Vostok-2M expendable carrier rocket, which is part of the Vostok rocket family.

### Physical Characteristics
The mass of Cosmos 100 was 3800 kilograms.

### Orbital Characteristics
Cosmos 100 maintained an orbit with the following parameters:
*   **Apoapsis:** 656 kilometres
*   **Periapsis:** 629 kilometres
*   **Orbital Period:** 97.57 minutes
*   **Orbital Inclination:** 65 degrees
*   **Orbital Eccentricity:** 0.001992

### End of Life
Cosmos 100 underwent atmospheric entry on February 15, 2002, marking the time of its object orbit decay.

### Related Entities
*   **Meteor:** The class of satellite to which Cosmos 100 belonged.
*   **Vostok (rocket family):** The family of rockets, originating from the Soviet Union, that includes the launch vehicle for Cosmos 100.
*   **Vostok-2M:** The specific expendable carrier rocket used to launch Cosmos 100.
*   **Vostok (spacecraft):** A type of spacecraft built by the Soviet Union, distinct from the rocket family but sharing the name.

## References

1. Jonathan's Space Report