1. We thank all our international partners for their great support during this mission!
Masaki Fujimoto
Deputy Director General, ISAS/JAXA

2. add ion engine
optical nav
for Friday
also crater impact

3. Hayabusa2 Spacecraft MASCOT take Monday
RCS thrusters (reaction control system)
Ion engine
Optical navigation cameras ONC-T, ONC-W1
take Monday
Re-entry capsule
Sampler horn
MASCOT
MINERVA-II
Small carry-on impactor (SCI)

4. Hayabusa2 launch
December 3, 2014
(JAXA)

5. Earth Swing-by December 3, 2015 monday (just animation)
ONC team: JAXA, The University of Tokyo, Chiba Institute of Technology, Rikkyo University, Meiji University, Nagoya University, The University of Aizu, and Kochi University, AIST.

6. Ion engine operation Summary of forward cruise ion engine operation
Period
Name
# thrusters
(m/s)
Time (h)
Initial check
IES operaitons test -
IES Powered Navigation 1 2 44
409
IES max. thrust test 3 4 24
IES Powered Navigation 2 11
102
IES Powered Navigation 3
1.3 12 Δ𝑣
Before swing-by
(IES: ion engine system)
Arrival at Ryugu (Jun - Jul 2018)
Phase-1 ion engine operations ( , incl, added burns)
Hayabusa2 orbit
Trajectory of Ryugu
Phase-3 ion engine operations ( )
Earth orbit
Launch ( )
Phase-2 ion engine operations ( )
Earth swing-by ( )
Period
Name
# thrusters
(m/s)
Time (h)
~ 21
Phase 1: ion engine operation
3 (2 at times)
127
798
~ 26
Phase 2: ion engine
435
2593
~ 06.3
Phase 3: ion engine
2 —> 3
393
2474
After swing-by Δ𝑣

7. Optical Navigation ZHP [km] ZHP [km] XHP [km] XHP [km] towards Earth
-40
XHP [km]
ZHP [km] 40 80
120
160
500
1000
1500
2000
XHP [km]
ZHP [km]
100
150
200
250 50 -5
-2.5
2.5 5
6/18 TCM05
6/20 TCM06
6/22 TCM07
6/24 TCM08
6/26 TCM09
6/27 Arrival manoeuver
6/8 TCM01
Approach corridor (Direction of approach while keeping asteroid in view of the camera)
6/11 TCM02
6/14 TCM03
6/16 TCM06
Enlarged view
The zigzag path increases stereo vision effect to improve the accuracy of the approach
Asteroid sits at origin
TCM: Trajectory Control Maneuver

8. Arrival at Ryugu
Note about ion engine operation (time form X to Y 2018) —> then optical navigation

9. Arrival at Ryugu 20 km distance: “Home Position”
just picture and say at 20km.
20 km distance: “Home Position”
(JAXA, University of Tokyo and collaborators)

10. Shape model of Ryugu Shape model by University of Aizu
Shape model by Kobe University
 Technique: ”Structure-from-Motion" (SfM).
Technique: ”Stereophotoclinometry" (SPC).
Also used to create terrain and building shapes from aerial images.
Previously used to model the shape of asteroid Itokawa.
(University of Aizu, Kobe University (shape model creation), Auburn University (video creation), JAXA)
(Kobe University, University of Aizu (shape model creation), Auburn University (video creation), JAXA)

11. Gravity measurement operation
monday
ONC-T camera (close-up), ONC-W1 (global), altitude ~1000m.
Aug 7, 2018 ~7:57 JST.
Freefall from 6000m ~ 851m
GM ~ 30m2s-2
(1/8000th Earth at equator)
(JAXA, University of Tokyo and collaborators)

12. Surface features High boulder coverage
(Green marks identified boulders between 8m to more than 10m)
Largest near south pole ~ 130m across.
(JAXA, University of Tokyo and collaborators)

13. Landing site selection
Monday and Prior to this, show one of rough surface (e.g. boulders marked)
(JAXA, University of Tokyo and collaborators)
NASA & ESA support for data transmission via Ka band enabled the prompt data analysis necessary for timely landing site selection.

14. MINERVA-II1 deployment
Monday
(JAXA, University of Tokyo and collaborators)

15. Highest resolution image of Ryugu to date.
Optical Navigation Camera - Telescopic (ONC-T)
During MINERVA- II1 deployment, altitude ~64m
Monday (no text)
September 21, at around 13:04 JST.
(JAXA, University of Tokyo and collaborators)

16. MINERVA-II1 September 23, 2018: immediately before hop of Rover-1B
Monday
(JAXA)

17. MINERVA-II1
…. and after landing
Monday
(JAXA)

18. MASCOT Mobile Asteroid Surface Scout
Three image animation of MASCOT deployment captured by the ONC-W2
October 3, 01:57:54– 01:58:14 UTC
Separation time: 01:57:20

20. Schedule October 2 ~ 4 MASCOT operation:
(MASCOT separation: October 3, ~04:00 GMT+2)
The latter half of October
Touchdown rehearsal:
Solar conjunction
(Communication disabled)
November - December
Further detailed planning based on MINERVA-II1, MASCOT & rehearsal data
Hard deadline: June 2019
Touchdown :
Crater generation operation:
March - April
Remain near asteroid
August - November
Departure from asteroid
November - December

21. Towards landing and sampling operation

22. Imaged during the MASCOT deployment operation, from 1.9km altitude,
The spot that is most suitable for landing identified: What needs to be done is to improve the navigation accuracy to hit a hole-in-one to this spot
Diameter ~20m
Imaged during the MASCOT deployment operation, from 1.9km altitude,
20cm/pixel resolution

23. Rehearsal on Oct:
- Descent down to 22.3m altitude, with 10.8m navigation accuracy
(when projected to the surface)
- LRF (Laser Rabge Finder, an instrument
necessary at low altitude operations)
confirmed to operate 6m
Image taken with the ONC-W1 at an altitude of about 47m. Capture time was October 15, 2018 at 22:45 JST. （Image credit：JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University. Chiba Institute of Technology, Meiji University, Aizu University, AIST.)

24. Rehearsal that just ended:
- Descent down to 12m altitude
- TM (Target Marker: artificial land mark to be deployed on the surface
for precise navigation) deployed successfully from 13m altitude
- TM imaged successfully from the hovering position of 20m altitude
- TM tracking navigation performance yet to be confirmed
TM: 10cm-ish ball covered by retroreflective film. Situating bright points at known locations enables precise relative navigation.
Imaged on Oct 25, 2018, 11:47 JST.
Hayabusa2 altitude 20m.

25. Schedule October 2 ~ 4 MASCOT operation:
(MASCOT separation: October 3, ~04:00 GMT+2)
The latter half of October
Touchdown rehearsal:
Solar conjunction
(Communication disabled)
November - December
Further detailed planning based on MINERVA-II1, MASCOT & rehearsal data
Earliest in Jan Hard deadline: June
Touchdown :
Crater generation operation:
March - April
Remain near asteroid
August - November
Departure from asteroid
November - December

26. Earth return 2020, landing in Australia
Hayabusa,
Masaki Fujimoto
Deputy Director General, ISAS/JAXA