September 28, 2018
Hayabusa2 Spacecraft
The main characteristics of the Hayabusa2 spacecraft are as follows:
- Mass: 600 kg at launch for 500 kg of dry mass,
- Size of the structure: 1.0 m x 1.6 m x 1.2 m
- Energy: 2 solar panels (power 2.6 kW at 1 AU), batteries Li-ion
- Propulsion: ion engine with xenon propellant (for the big cruise manoeuvres (4 x 28 mN thrusters with a specific impulse of 2800 s producing 2 km/s in total) and hydrazine for the cruise correction manoeuvres and the asteroid/Earth proximity manoeuvres (12 x 20 N thrusters)
- Attitude control, 4 reaction wheels, 2 Star Trackers, 2 inertial reference units, 4 accelerometers, 4 sun sensors
- Navigation sensors for the asteroid proximity operations: optical cameras, LIDAR (from 20 km to 100 m altitude), Target Marker (TM), ONC-W1 and Flash Lamp (FLASH) (from 100 m to 30 m altitude) and Laser Range Finder (LRF) (from 30 m to 5 m altitude)
- TM/TC : 2 high gain antennas (X&KU band) and 1 medium gain antenna
Location of the different sub-systems on the Hayabusa2 probe
The Hayabusa2 payload is presented in the table below:
| Payload | Characteristics |
| Multiband imager (ONC-T, ONC-W1&ONC-W2) | Wavelenght: 0.4 - 1.0 µm, FOV: 5.7 deg x 5.7 deg 1 MPixel for Telescopic Camera FOV : 57 deg x 57 deg 1 MPixel for Wide Cameras 5 filters (Heritage of Hayabusa 1) |
| Near IR Spectrometer (NIRS3) | Wavelength: 1.7 - 3.4 µm, FOV: 0.1 deg x 0.1 deg (Heritage of Hayabusa 1, but 3 µm range is new) |
| Thermal IR Imager (TIR) | Wavelength: 7 - 14 µm, FOV: 12 deg x 16 deg, Pixel Number: 320 x 240 px (Heritage of Akatsuki) |
| Laser Altimeter (LIDAR) | Measurement Range: 50 m - 50 km (Heritage of Hayabusa 1) |
| Sampler Horn (SMP) | Minor modifications from Hayabusa 1 (Heritage of Hayabusa 1) |
| Small Carry-on Impactor (SCI) | Small, deployed system to form an artificial crater on the surface (New) |
| Separation Camera (DCAM) | Small, deployed camera to watch operation of Small Carry-on Impactor (Heritage of Ikaros) |
| Re-entry Capsule (CPSL) | Heritage of Hayabusa 1 |
| Small Rover (MINERVA II-A1/A2/B) | Almost the same as MINERVA of Hayabusa 1 (possible payload: Cameras, thermometers) (Heritage of Hayabusa 1) |
| MASCOT | Supplied by DLR/CNES MicrOmega, MAG, CAM, MARA |
Except for MASCOT and the impactor, the payload is highly inherited from Hayabusa 1 or other Japanese missions.
The impactor should form a 2-meter diameter crater enabling to take samples which are not from the surface.
Hayabusa2 should collect three samples: one sample by the end of 2018 and two samples during the first half of 2019.
Published in: