EXPLORER 21 (IMP-2)
NORAD 889 · Payload · Reentered 1966-01-30
View in the 3D atlas →- Launched
- 1964-10-04 · Cape Canaveral / Kennedy, USA
- Country / operator
- US (United States)
- Object type
- Payload
- Purpose
- Space science
- Mass
- 62 kg
- Size
- 0.2 × 0.7 m · 2.5 m deployed
- Orbit class
- Highly elliptical
- Perigee × Apogee
- 917 × 94,291 km
- Inclination
- 33.7°
- Period
- 2079.9 min
- Eccentricity
- 0.8650
- Orbit data
- Reconstructed from catalog orbit
Mass, size and purpose from GCAT (J. McDowell, CC BY 4.0).