Key statistics
Satellite EPSILON R/B at a glance.
Uptime
4374
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: 102.742 minutes
Inclination: 29.7486 deg
SMA: 7266.516 km
Apoapsis: 970.693 km
Periapsis: 806.068 km
RAAN: 248.1721 deg
Eccentricy: 0.01132763
Argument of periapsis: 134.8731 deg
Mean anomaly: 226.1117 deg
Mean motion: 14.01565612 rev/day
Mean motion (dot): 0.00000203 rev/day2
B* drag term: 0.000080929988 1/REarth
Two-line elements (TLE)
Creation date: Sept. 4, 2025, 10:13 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 4, 2025, 6:33 a.m. UTC
TLE line 0: 0 EPSILON R/B
TLE line 1: 1 39255U 13049C 25247.27334551 .00000203 00000-0 80930-4 0 9990
TLE line 2: 2 39255 29.7486 248.1721 0113276 134.8731 226.1117 14.01565612613623
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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