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Vanguard 1 - Satellite Information

Designation
Spacetrack catalog number 5
COSPAR ID 1958-002-B
Name in Spacetrack catalog VANGUARD 1

Satellite Details

Orbit 652 x 3,835 km, 34.2°
Category Scientific
Country/organisation of origin United States
Mass 1 kg
Intrinsic brightness (Magnitude) 10.2 (at 1000km distance, 50% illuminated)
Maximum brightness (Magnitude)8.3 (at perigee, 100% illuminated)

Launch

Date (UTC) 17 March 1958 12:15
Launch siteCape Canaveral Air Force Station,
United States
Launch vehicle Vanguard

Description

The oldest man-made object in orbit!

Links to further information http://www.spaceviews.com/1998/03/article1a.html
Picture of satellite
View from orbit pole
 

DLR