Artistic rendering of Hisaki in orbit.
Mission type Ultraviolet astronomy
Operator JAXA
COSPAR ID 2013-049A
SATCAT № 39253
Website /_a/sprint/sat/projects.jp.jaxawww
Mission duration 1 year
Spacecraft properties
Manufacturer NEC
Launch mass 340 kg (750 lb)
Dimensions 4×1×1 m (13.1×3.3×3.3 ft)
Power 900 watts
Start of mission
Launch date 14 September 2013, 05:00 (2013-09-14T05Z) UTC
Rocket Epsilon
Launch site Uchinoura
Orbital parameters
Reference system Geocentric
Regime Low Earth
Semi-major axis 7,431.52 kilometres (4,617.73 mi)[1]
Eccentricity 0.0136807[1]
Perigee 958 kilometres (595 mi)[1]
Apogee 1,162 kilometres (722 mi)[1]
Inclination 29.72 degrees[1]
Period 106.27 minutes[1]
Epoch 23 January 2015, 18:21:14 UTC[1]

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). The first mission of the Small Scientific Satellite programme,[2] it was launched in September 2013 on the maiden flight of the Epsilon rocket.

Hisaki was named after a cape Hisaki (火崎 literally Cape Fire) used by local fishermen to pray for safe travels in the eastern part of Kimotsuki, Kagoshima near the Uchinoura Space Center, but has the additional meaning of "beyond the Sun".[3][4] An old name for the mission was EXCEED (Extreme Ultraviolet Spectroscope for Exospheric Dynamics).[5]


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.[6] Designed for a one-year mission, Hisaki will be operated in a low Earth orbit with a perigee of 950 km (590 mi), an apogee of 1,150 km (710 mi), 31 degrees of inclination and a period of 106 minutes.[7]


An Epsilon was used to launch Hisaki. Making its first flight, the four-stage Epsilon rocket[8] flew from the Mu rocket launch complex at the Uchinoura Space Centre. The launch occurred at 05:00 UTC on 14 September 2013, following a scrubbed launch attempt on 27 August 2013.[9] Following its successful insertion into orbit and deployment of its solar arrays, the satellite was renamed Hisaki, having been designated SPRINT-A until that point.[10]


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  5. ^ F. Tsuchiya, et al. - Earth-orbiting Extreme Ultraviolet Spectroscopic Mission SPRINT-A/EXCEED
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