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🛰️ SATELLITE · HISTORICAL RECORD

Explorer 3

Re-entered 28 Jun 1958

Explorer 3 (NORAD 6, COSPAR 1958 GAM) was a US satellite that re-entered Earth's atmosphere on 28 Jun 1958, launched on 26 Mar 1958. It was operated by ABMA / JPLA as part of the Explorer ABMA programme. The spacecraft was built by JPLA on the Explorer bus, with a mass of 8 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.

1958
launched
1958
re-entered
0
years on orbit
8
kg mass

Lifecycle

Launched26 Mar 1958
Operational10 May 1958 · entered service
Retired10 May 1958 · end of operational service
Re-entered28 Jun 1958 · atmospheric re-entry — object destroyed

Specifications

NORAD ID6
COSPAR1958 GAM
TypeSatellite
OperatorABMA / JPLA
Country / StateUS
ManufacturerJPLA
BusExplorer
Mass8 kg
ProgrammeExplorer ABMA
CategorySCI
OrbitLEO (LEO/I)
Altitude195 × 2,810 km
Inclination33.4°

Frequently asked questions

What happened to Explorer 3?

Explorer 3 re-entered Earth's atmosphere on 28 Jun 1958, ending a mission that began with its launch in 1958. Objects in low orbits are gradually slowed by atmospheric drag until they fall back and burn up on re-entry.

When did Explorer 3 re-enter the atmosphere?

Explorer 3 re-entered on 28 Jun 1958, according to Orbital Radar's historical catalogue records.

Who operated and built Explorer 3?

Explorer 3 was operated by ABMA / JPLA and built by JPLA (US).

Historical record from the Orbital Radar satellite archive. Sources & methodology: data sources. Accessed 2026-09-06.