Key statistics
Satellite EPSILON R/B at a glance.
Uptime
4424
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
LEO
Low Earth Orbit
Inclination
29.8
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: 102.741 minutes
Inclination: 29.7517 deg
SMA: 7266.464 km
Apoapsis: 970.467 km
Periapsis: 806.191 km
RAAN: 330.7224 deg
Eccentricy: 0.01130369
Argument of periapsis: 217.0677 deg
Mean anomaly: 142.2057 deg
Mean motion: 14.01580658 rev/day
Mean motion (dot): 0.00000266 rev/day2
B* drag term: 0.00011811716 1/REarth
Two-line elements (TLE)
Creation date: Oct. 25, 2025, 3:11 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 24, 2025, 6:30 p.m. UTC
TLE line 0: 0 EPSILON R/B
TLE line 1: 1 39255U 13049C 25297.77140580 .00000266 00000-0 11812-3 0 9998
TLE line 2: 2 39255 29.7517 330.7224 0113037 217.0677 142.2057 14.01580658620718
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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