Key statistics
Satellite EPSILON R/B at a glance.
Uptime
4315
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
LEO
Low Earth Orbit
Inclination
29.7
Latest
Satellite identification and parameters
Extended collection of information and parameters for EPSILON R/B.
Object identification
Identified? True
Debris? False
Object name: EPSILON R/B
International designator: 2013-049C
Object number (NORAD): 39255
Object ID (CCSDS): 39255
Country: JAPAN (JPN)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 102.743 minutes
Inclination: 29.7483 deg
SMA: 7266.553 km
Apoapsis: 970.663 km
Periapsis: 806.174 km
RAAN: 209.8387 deg
Eccentricy: 0.0113182
Argument of periapsis: 342.2713 deg
Mean anomaly: 17.3943 deg
Mean motion: 14.01554758 rev/day
Mean motion (dot): 0.00000164 rev/day2
B* drag term: 0.000057414 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 5:25 p.m. UTC
TLE line 0: 0 EPSILON R/B
TLE line 1: 1 39255U 13049C 25188.72577989 .00000164 00000-0 57414-4 0 9995
TLE line 2: 2 39255 29.7483 209.8387 0113182 342.2713 17.3943 14.01554758605406
Live tracking on map
Real-time ground track for satellite EPSILON R/B.
Associated space launch
Hisaki, also known as the Spectroscopic Planet Observatory for Recognition of Interaction of Atmosphere (SPRINT-A) is a Japanese ultraviolet astronomy satellite operated by the Japan Aerospace Exploration Agency (JAXA). Hisaki carries an extreme ultraviolet spectrometer which will be used to study the composition of the atmospheres and the behavior of the magnetospheres of the planets of the Solar System.
EPSILON R/B was lifted into orbit during the mission ‘Epsilon | Hisaki (SPRINT-A)’, on board a Epsilon space rocket.
The launch took place on Sept. 14, 2013, 5 a.m. from Mu Center.
For more information about the launch, click the button.
Epsilon | Hisaki (SPRINT-A)
Agency: N/A
Status: Launch Successful
Launch date: Sept. 14, 2013, 5 a.m. UTC
Rocket: Epsilon
Launch pad: Mu Center
Location: Uchinoura Space Center, Japan
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