Mir Core Module
 Model of DOS-7 in an early configuration, docked with Kvant-1. | |
| Module statistics | |
|---|---|
| Part of | Mir |
| Launch date | February 20, 1986 (UTC) |
| Reentry | March 23, 2001 (UTC) |
| Mass | 20,400 kg (45,000 lb) |
| Length | 13.13 m (43.1 ft) |
| Diameter | 4.5 m (15 ft) |
| Pressurised volume | 90 m3 (3,200 cu ft) |
| Configuration | |
 Diagram of DOS-7 in its original configuration. | |
The Mir Core Module, also known as the Base Block or DOS-7, was a module of the Mir space station. It was the first module to be launched and operated in low Earth orbit from 1986 until its de-orbiting in 2001. The module was launched on a Proton-K rocket on February 20th, 1986.
A spare of this module, originally designed for Mir-2, later became the Zvezda module used on the International Space Station.