Designation
|
Spacetrack catalog number
|
870
|
|
COSPAR ID
|
1964-051-A
|
|
Name in Spacetrack catalog
|
EXPLORER 20
|
Satellite Details
|
Orbit
|
852 x 994 km, 79.9°
|
| Category | unknown |
| Country/organisation of origin | United States |
| Intrinsic brightness (Magnitude) | 7.2 (at 1000km distance, 50% illuminated) | | Maximum brightness (Magnitude) | 6.5 (at perigee, 100% illuminated) |
Launch
|
Date
(UTC)
|
25 August 1964 13:43
|
| Launch site | Vandenberg Space Force Base,
United States |
| Launch vehicle | Scout X-4 |
|
|