Visualize the orbit of Hayabusa2

Hayabusa2 orbit data

The other day (October 21, 2020), the orbit information of "Hayabusa2" was released. Orbit of "Hayabusa2" from launch to just before returning to Earth (TCM-3)

The file "hayabusa2_orbit_20201021.txt" is attached to the above article. The contents include the time since the launch in 2014, the date of calculation from the launch, Hayabusa2, the Earth, and the coordinates of Ryugu (center of the sun). Since the orbit accuracy is 1000km, I don't think it can be used for research.

In this article, I would like to visualize the orbits of Hayabusa2 and Ryugu with animation using the orbit data released. (What we are doing is just reading the file and graphing the numerical data)

The source code is available on github (implemented in Python). https://github.com/motthi/hayabusa2_orbit

Orbit in sun center coordinates

Outbound

absoluteOrbit.gif

Return trip

absoluteOrbit_back.gif

Orbit in earth center coordinates

If you take the difference between Hayabusa2 and the Earth, and Ryugu and the Earth, you can find the orbit as seen from the Earth.

Outbound

relative_e.gif

Return trip

relative_e_b.gif

Looking at this, the earth and Ryugu are quite close to each other.

The future of Hayabusa2

The return date of the capsule to Earth is December 6, 2020. The spacecraft itself will continue to operate after that, and an exploration mission (EAEEA scenario) to the asteroid called 1998 KY26 is planned in 2031.

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