ARGON 21
Re-entered 2 Jun 1965ARGON 21 (NORAD 811, COSPAR 1964-030A) was a US satellite that re-entered Earth's atmosphere on 2 Jun 1965, launched on 13 Jun 1964 on the ARGON 21 mission. It was operated by NRO / ACE as part of the CORONA ARGON programme. The spacecraft was built by LMSC on the CORONA ARGON bus, with a mass of 180 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 ARGON 21?
ARGON 21 re-entered Earth's atmosphere on 2 Jun 1965, ending a mission that began with its launch in 1964. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.
When did ARGON 21 re-enter the atmosphere?
ARGON 21 re-entered on 2 Jun 1965, according to Orbital Radar's historical catalogue records.
Who operated and built ARGON 21?
ARGON 21 was operated by NRO / ACE and built by LMSC (US).