EXPLORER 11

NORAD 107 · Payload · In orbit since 1961

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Launched: 1961-04-27 · Cape Canaveral / Kennedy, USA
Country / operator: US (United States)
Object type: Payload
Purpose: Astronomy
Mass: 40 kg
Size: 1.1 × 0.3 m
Orbit class: LEO (< 2,000 km)
Perigee × Apogee: 463 × 1,172 km
Inclination: 28.8°
Period: 101.1 min
Eccentricity: 0.0493
Orbit data: Reconstructed from catalog orbit

Mass, size and purpose from GCAT (J. McDowell, CC BY 4.0).