OSO I
Re-entered 9 Jul 1986OSO I (NORAD 7970, COSPAR 1975-057A) was a US satellite that re-entered Earth's atmosphere on 9 Jul 1986, launched on 21 Jun 1975 on the OSO I mission. It was operated by GSFC as part of the OSO programme. The spacecraft was built by HSES on the HS-331 bus, with a mass of 1,064 kg. Like most satellites in low orbits, it was gradually slowed by atmospheric drag until re-entry. Historical record from Orbital Radar's satellite archive, cross-referenced with the live satellite catalogue.
Lifecycle
Specifications
Frequently asked questions
What happened to OSO I?
OSO I re-entered Earth's atmosphere on 9 Jul 1986, ending a mission that began with its launch in 1975. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.
When did OSO I re-enter the atmosphere?
OSO I re-entered on 9 Jul 1986, according to Orbital Radar's historical catalogue records.
Who operated and built OSO I?
OSO I was operated by GSFC and built by HSES (US).