Skylab (SL-4).jpg
Skylab as photographed by its departing final crew (Skylab 4)
Skylab Program Patch.png
Skylab program insignia
Station statistics
COSPAR ID1973-027A
SATCAT no.06633
Call signSkylab
Crew3 per mission (9 total)
LaunchMay 14, 1973
17:30:00 UTC
Carrier rocketSaturn V
Launch padKennedy Space Center LC-39A
ReentryJuly 11, 1979
16:37:00 UTC
near Perth, Australia
Mission statusComplete
Mass170,000 lb (77,000 kg)[1]
w/o Apollo CSM
Length82.4 feet (25.1 m)
w/o Apollo CSM
Width55.8 feet (17.0 m)
w/ one solar panel
Height36.3 feet (11.1 m)
w/ telescope mount
Diameter21.67 feet (6.6 m)
Pressurized volume12,417 cu ft (351.6 m3)
Atmospheric pressure5.0 psi (34 kPa) Oxygen 74%, nitrogen 26%[2]
Perigee altitude269.7 mi (434.0 km)
Apogee altitude274.6 mi (441.9 km)
Orbital inclination50°
Orbital period93.4 min
Orbits per day15.4
Days in orbit2,249 days
Days occupied171 days
No. of orbits34,981
Distance travelled~890,000,000 mi (1,400,000,000 km)
Statistics as of Re-entry July 11, 1979
Skylab illustration.jpg
Skylab configuration as planned

Skylab was the first United States space station, launched by NASA,[3] occupied for about 24 weeks between May 1973 and February 1974. As of 2019, it was the only space station operated exclusively by the United States. A permanent US station was planned starting in 1969, but funding for this was canceled and replaced with US participation in an International Space Station in 1993.

Skylab included a workshop, a solar observatory, and several hundred life science and physical science experiments, and was launched uncrewed into low Earth orbit by a modified Saturn V rocket, with a weight of 170,000 pounds (77,000 kg). This was the final mission for the Saturn V rocket, famous for carrying the crewed Moon landing missions.[4] Three subsequent missions delivered three-astronaut crews in the Apollo command