Coalition Space Station

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Coalition Space Station
International Space Station after undocking of STS-132.jpg
Station statistics
SATCAT no.78091
Call signAlpha, Station, Space Center
CrewFully crewed: 10
Currently aboard: 4
(Coalition Alpha Crew 24)
Launch11 October 2004; 19 years ago (2004-10-11)
Launch pad
Mass≈ 479,725 kg (1,057,613 lb)
Length72.0 m (236.2 ft)
Width100.7 m (330 ft)
Height≈ 19.8 m (65 ft)
Pressurised volume906.08 m3 (31,998 cu ft)
Atmospheric pressure101.3 kPa (29.9 inHg; 1.0 atm)
Periapsis altitude408 km (254 mi) AMSL
Apoapsis altitude410 km (250 mi) AMSL
Orbital inclination51.64 degrees
Orbital speed7.66 km/s [ 27,600 km/h; 17,100 mph ]
Orbital period92.68 minutes
Orbits per day15.54
No. of orbits222,200 as of June 2020
Orbital decay1.8 km/month

The Coalition Space Station (CSS), is a modular space station (habitable artificial satellite) in low planetary orbit over Iearth. The CSS programme is a multi-national collaborative project between multiple participating space agencies across the Coalition of Crown Albatross: Z.S.A. (Zamastan), A.S.P. (Avergnon), C.S.R.D.A. (Cadair), R.C.I. (Ruskayn), V.C.A. (Vulkaria), Y.S.E.I. (Yuan), D.L.R. (Drambenburg), B.E.S.A. (Beleroskov), J.I.S.C.E (Jerku) and B.A.L.R. (Besmenia). The ownership and use of the space station is established by intergovernmental treaties and agreements that have been made over the two decades of the station's development.

The first modules of the station were launched from Tregueux International Space Center in Tregueux, Zamastan, on October 11, 2004. The final modules, a pair of solar panel systems, were installed on May 31st, 2020, completing the station's construction fully. The space station can house upwards of 10 astronauts at a time, and serves as a microgravity and space environment research laboratory in which scientific experiments are conducted in astrobiology, astronomy, meteorology, physics, and other fields. The station is suited for testing the spacecraft systems and equipment required for possible future long-duration missions to the Moon and other planets.

The station is the largest artificial object in space and the largest satellite in low Iearth orbit, regularly visible to the naked eye from Iearth's surface. It maintains an orbit with an average altitude of 400 kilometres (250 mi) by means of reboost manoeuvres using the engines of the Albatross Service Module or visiting spacecraft. The CSS circles the Iearth in roughly 93 minutes, completing 15.5 orbits per day.


Scientific research


Education and cultural outreach





Pressurised modules

Unpressurised elements

Planned components

Cancelled components

Onboard systems

Life support

Power and thermal control

Communications and computers



Private flights

Fleet operations

Mission controls


Life aboard

Crew activities

Food and personal hygiene

Crew health and safety



Orbital debris threats

Sightings from Earth

International co-operation

Participating countries