Japanese Asteroid Mission To Carry Amateur Radio

Abyss 2 / Shin'en 2

Abyss 2 / Shin’en 2

A Japanese news report says the asteroid mission Hayabusa 2, planned to launch November 30, 2014 at 0424 UT (1324 JST) on a H-IIA rocket, will also carry the amateur radio satellite Abyss 2 / Shin’en 2. Another amateur radio satellite ARTSAT2:DESPATCH will also be on the launch.

Shin’en 2 is  a polyhedron measuring 490×490×475 mm and weighing 17 kg. It was built by students at Kyushu Institute of Technology and carries a Mode J linear transponder for amateur radio communications along with CW and WSJT beacons.

Shin’en 2 will have an elliptic orbit around the Sun and travel to a deep space orbit between Venus and Mars. Its inclination will be almost zero, which means Shin’en 2 will stay in the Earth’s equatorial plane The distance from the Sun will be between 0.7 and 1.3 AU. An Astronomical Unit (AU) is 149,597,871 km.

Shin’en 2 frequencies:
• 437.505 MHz A1A CW beacon 0.1 watt
• 437.385 MHz F1D Telemetry using mode similar to WSJT but not the same 0.8 watt
• 435.270 MHz F1D Downlink for communications experiment 0.4 watt
• 145.942 MHz F1D Uplink for communications experiment
• 145.*** MHz F2D Control uplink

Originally it was planned to fly an inverting SSB/CW transponder but it is now understood the transponder will not be operational
– 145.940-145.960 MHz uplink LSB
– 435.280-435.260 MHz downlink USB

Read the Japanese language article (try Chrome translator) at

Shin’en2 English website http://www.shin-en2.jp/index_E.html

Shin’en2 project website http://kit-okuyama-lab.com/en/sinen2/sinen2-outline/

Shin’en2 to carry Mode J linear transponder – linear transponder now omitted

Shin’en2 Satellite Linear Transponder Frequencieslinear transponder now omitted


Hayabusa 2 http://en.wikipedia.org/wiki/Hayabusa_2