Key statistics
Satellite ATLAS 5 CENTAUR R/B at a glance.
Uptime
3720
Days in orbit
Revolutions
≈ 15.0
Per day
Orbit
LEO
Low Earth Orbit
Inclination
64.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for ATLAS 5 CENTAUR R/B.
Object identification
Identified? True
Debris? False
Object name: ATLAS 5 CENTAUR R/B
International designator: 2015-058Q
Object number (NORAD): 40978
Object ID (CCSDS): 40978
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 95.807 minutes
Inclination: 64.7701 deg
SMA: 6935.711 km
Apoapsis: 637.358 km
Periapsis: 477.794 km
RAAN: 9.2875 deg
Eccentricy: 0.01150305
Argument of periapsis: 129.704 deg
Mean anomaly: 231.4289 deg
Mean motion: 15.03025204 rev/day
Mean motion (dot): 0.00007903 rev/day2
B* drag term: 0.00051778183 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 10 a.m. UTC
TLE line 0: 0 ATLAS 5 CENTAUR R/B
TLE line 1: 1 40978U 15058Q 25347.41668489 .00007903 00000-0 51778-3 0 9994
TLE line 2: 2 40978 64.7701 9.2875 0115030 129.7040 231.4289 15.03025204 87285
Live tracking on map
Real-time ground track for satellite ATLAS 5 CENTAUR R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object ATLAS 5 CENTAUR R/B.
Associated space launch
Classified payload for the U.S. National Reconnaissance Office.
ATLAS 5 CENTAUR R/B was lifted into orbit during the mission ‘Atlas V 401 | NROL-55 (Multipayload mission)’, on board a Atlas V 401 space rocket.
The launch took place on Oct. 8, 2015, 12:49 p.m. from Space Launch Complex 3E.
For more information about the launch, click the button.
Atlas V 401 | NROL-55 (Multipayload mission)
Agency: N/A
Status: Launch Successful
Launch date: Oct. 8, 2015, 12:49 p.m. UTC
Rocket: Atlas V 401
Launch pad: Space Launch Complex 3E
Location: Vandenberg SFB, CA, USA
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