Makoto YOSHIKAWA

5th Space Debris Workshop (January 22-23, 2013, Chofu Aerospace Center, Japan Aerospace Exploration Agency (JAXA)), Chofu, Tokyo, JapanI present the method and the examples of light-curve observations of space debris, using TDI (Time Delay Integration) technique. TDI mode is a readout technique of shifting the charge on the CCD while the shutter is open. It is usually applied to the moving objects with the expected motion, so that they appear as point sources. I tried to apply the TDI method to non-moving objects to derive their short-period light-curves. The advantage of the method and the result of the test observations will be presented here.Physical characteristics: Original contains color illustrations

We have developed methods to visualize trajectories and attitudes of "Hayabusa" spacecraft probing around the asteroid Itokawa. We visualized trajectories and attitudes of "Hayabusa"using public data of those parameters. Then, around the touchdown phase, we corrected the positions of "Hayabusa" using the public data and engineering data, until we succeeded to enhance the accuracy of the trajectories in the visual of the rendezvous of"Hayabusa"and Itokawa.

After the asteroid sample return mission Hayabusa was completed successfully, we have now started Hayabusa follow-on mission, Hayabusa-2. It is an asteroid sample return mission again, but the type of the target asteroid is C-type, which is different from the target of Hayabusa, Itokawa (S-type). The scale of the spacecraft is similar to Hayabusa, but many parts will be modified so that we will not have the troubles that we experienced in Hayabusa. Also the spacecraft has new equipment, which is called impactor. The impactor will make an artificial crater on the surface of the asteroid, and we will try to get the sample inside the crater. Then we can get much fresh material. The planned launch year is 2014, arriving at the target asteroid 1999 JU3 in 2018, and coming back to the earth 2020. In this paper, we present the current status of Hayabusa-2 mission.

We will report the current status of the sampling system of Hayabusa-2, a sample return project from a near-Earth C-type asteroid.