Ryugu Showing the 1 km Image Location
Edited Hayabusa 2 context image of of Ryugu showing the extent of the previous closer image. Processing variant.
Image source: www.hayabusa2.jaxa.jp/topics/20180807/index.html
Original caption (via Google Translate): After arriving in Ryugu on June 27, on 20-21 July I went down to about 6 km as BOX-C operation, and on August 1 we did a medium altitude operation of about 5 km altitude It was. From August 6th, we performed the third descent operation in order to measure the gravity of the Ryugu.
In the gravity measurement operation, we will exercise the spacecraft with the attraction of the crown without doing the trajectory and attitude control of the probe as much as possible (free fall, free rise). By doing so, you can grasp exactly the movement of the spacecraft, you can see how strong the gravity is from the Ryugu.
The spacecraft started its descent from its home position (distance from Ryuguu is 20 km) before 11:00 on August 6 (Japan time). At about 20:30 on the same day, the altitude reached 6000 m, and it was free falling from there. Then, it approached the minimum altitude of 851 m around 8:10 on August 7, where it threw up the thruster and started to rise.
Figures 1 and 2 show the images taken with the telephoto optical navigation camera (ONC - T) just before reaching the minimum altitude.
In addition, the orbiter / posture control will not be carried out until it reaches the altitude of about 5000 meters. The data of the movement of the spacecraft during this time is also used to estimate the gravity of the Ryugu.
Credit: JAXA, Tokyo University etc
Ryugu Showing the 1 km Image Location
Edited Hayabusa 2 context image of of Ryugu showing the extent of the previous closer image. Processing variant.
Image source: www.hayabusa2.jaxa.jp/topics/20180807/index.html
Original caption (via Google Translate): After arriving in Ryugu on June 27, on 20-21 July I went down to about 6 km as BOX-C operation, and on August 1 we did a medium altitude operation of about 5 km altitude It was. From August 6th, we performed the third descent operation in order to measure the gravity of the Ryugu.
In the gravity measurement operation, we will exercise the spacecraft with the attraction of the crown without doing the trajectory and attitude control of the probe as much as possible (free fall, free rise). By doing so, you can grasp exactly the movement of the spacecraft, you can see how strong the gravity is from the Ryugu.
The spacecraft started its descent from its home position (distance from Ryuguu is 20 km) before 11:00 on August 6 (Japan time). At about 20:30 on the same day, the altitude reached 6000 m, and it was free falling from there. Then, it approached the minimum altitude of 851 m around 8:10 on August 7, where it threw up the thruster and started to rise.
Figures 1 and 2 show the images taken with the telephoto optical navigation camera (ONC - T) just before reaching the minimum altitude.
In addition, the orbiter / posture control will not be carried out until it reaches the altitude of about 5000 meters. The data of the movement of the spacecraft during this time is also used to estimate the gravity of the Ryugu.
Credit: JAXA, Tokyo University etc