Key statistics
Satellite SCOUT X-4 R/B at a glance.
Uptime
22230
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
LEO
Low Earth Orbit
Inclination
79.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for SCOUT X-4 R/B.
Object identification
Identified? True
Debris? False
Object name: SCOUT X-4 R/B
International designator: 1964-051B
Object number (NORAD): 871
Object ID (CCSDS): 871
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 102.822 minutes
Inclination: 79.8938 deg
SMA: 7270.268 km
Apoapsis: 955.261 km
Periapsis: 829.006 km
RAAN: 90.4447 deg
Eccentricy: 0.008683
Argument of periapsis: 350.0702 deg
Mean anomaly: 9.8738 deg
Mean motion: 14.00480616 rev/day
Mean motion (dot): 0.00000157 rev/day2
B* drag term: 0.000097445 1/REarth
Two-line elements (TLE)
Creation date: July 5, 2025, 10:26 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 5, 2025, 8:36 p.m. UTC
TLE line 0: 0 SCOUT X-4 R/B
TLE line 1: 1 871U 64051B 25186.85856985 .00000157 00000-0 97445-4 0 9994
TLE line 2: 2 871 79.8938 90.4447 0086830 350.0702 9.8738 14.00480616 96844
Live tracking on map
Real-time ground track for satellite SCOUT X-4 R/B.
Associated space launch
Explorer 20 (IE A, Ionospheric Explorer A, TOPSI, Top Side Explorer or S 48) was designed to measure electron distribution, ion density and temperature, and to estimate cosmic noise levels between 2 and 7 MHz.
SCOUT X-4 R/B was lifted into orbit during the mission ‘Scout X-4 | Explorer 20’, on board a Scout X-4 space rocket.
The launch took place on Aug. 25, 1964, 1:43 p.m. from Space Launch Complex 5.
For more information about the launch, click the button.
Scout X-4 | Explorer 20
Agency: N/A
Status: Launch Successful
Launch date: Aug. 25, 1964, 1:43 p.m. UTC
Rocket: Scout X-4
Launch pad: Space Launch Complex 5
Location: Vandenberg SFB, CA, USA
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