Main Characteristics of KAGUYA | Mission

Main Characteristics of KAGUYA

Main Characteristics of KAGUYA
Main Orbiter
Mass: 3 tons
(at launch, including two small satellites)
Size: 2.1m x 2.1m x 4.8m
Attitude Control: Three-axis stabilized
Power: 3.5 kW (Max.)
Mission period: 1 year
Mission Orbit: Circular orbit,
Altitude 100km
Inclination 90 degree
Small satellites
Mass: 50 kg
Size: 1.0 x 1.0 x 0.65 m
Attitude Control: Spin-stabilized
Power: 70 W
(Initial Orbit)
"OKINA" [Relay Satellite]
Elliptical orbit (100km x 2,400km),
Inclination 90 degrees
"OUNA" [VRAD Satellite]
Elliptical orbit (100km x 800km),
Inclination 90 degrees


Proto-Flight Model
Mission Instruments
Mission Group Mission Instruments Mission Overview
X-ray Spectrometer
The surface elemental composition (Al, Si, Mg, Fe, etc.) is determined through X-ray fluorescence spectrometry by irradiation of solar X-rays.
Gamma Ray
The abundance of key elements (U, Th, K, H, etc.) is determined by measuring energy spectra of gamma-rays from the lunar surface with high energy resolution.
Multi band Imager
The mineral distribution is obtained by taking the visible and near infrared images of the Moon's surface in nine wavelength bands.
Spectral Profiler
The mineral composition of the Moon's surface is obtained by measuring the continuous visible and near infrared spectrum.
Terrain Camera
High-resolution geographical features are acquired by the stereo cameras.
Lunar Radar Sounder
The subsurface stratification and tectonic features in the shallow part of the lunar crust (a few km) by high-power RF pulses.
Laser Altimeter
To make the lunar topography model, the altitude is precisely measured using high-power laser pulses.
Environment Lunar Magnetometer
The magnetization structure on the Moon is acquired by measuring the lunar and the surrounding magnetic field.
Charged Particle
Alpha rays from the Moon's surface and the abundance of cosmic ray particles are measured.
Plasma energy Angle
Composition Experiment
The three dimensional distribution of the low-energy electrons and mass-discriminated low-energy ions around the Moon are measured.
Radio science
The Moon's ionosphere is detected by measuring the small deviation of the phase of RF signals from the VRAD satellite.
Plasma Imager
Images of the magnetosphere and the ionosphere around the Earth are taken from the Moon to study the behavior of the plasma.
Four way Doppler
by Relay satellite
Main Orbiter
The local gravity field of the far-side of the Moon is observed by measuring the disturbance of the orbit of the Main Orbiter using Doppler measurement.
Differential VLBI Radio Source
The accurate gravity field data of the Moon are obtained by measuring the orbits of "OKINA" [Relay] and "OUNA" [VRAD] satellites using differential VLBI observation of S and X band radio waves.(VIBI: Very Long Baseline Interferometer)
High definition
High Definition Television
Taking pictures and movies of the Earth and the Moon with high-definition television cameras.