1. Page 1 BepiColombo MMO Status Update For HEWG2014, June 2014

2. Page 2 Mass small positive margin Need careful control Final AIV Vibration and Shock test was finished. MMO status

3. Final AIV(Before Environmental Test) ＠ ISAS

4. Page 4 Contamination : Closed Molecular contamination from MMO : No hazardous contaminant will be left on the surface of MMO Particulate contamination from MPO HT MLI Minimized by the separation foil between MPO and MMO MMO status

5. Page 5 Solar Cell Whitening : to be closed FM Solar cell whitening was found after thermal cycling (-160 ℃ ～ 180 ℃ ) in vacuum. Has been regarded as the most critical item. Cell whitening was caused by the pealing of anti-reflector coating from cell. Cell whitening broadened when the cell is exposed to the air after testing. In vacuum condition, whitening expands only during first heat-up cycle but not later. MMO status

6. Page 6 Solar Cell Whitening Cell whitening observed where the thickness of the glue(DC93-500) is less than 40um

7. Page 7 Currently degradation of power generation due to the cell whitening is less than 1%. Worst case analysis shows degradation of power generation at EOL is 11% which is lower than the budget (17%). → Use as is. Solar cell whitening

8. Page 8 Final AIV : end at October 2014 1 axis vibration test : July 2014. Thermal valance test : August 2014. Transportation to ESA/ESTEC : Jan. 2015 MMO stand alone test at ESTEC : Feb.- Mar. 2015 MMO hand over to ESA : End of Apr. 2015 MCS final AIV : May – Dec. 2015 Transportation to CSG : Dec. 2015 Launch Campaign : Jan. – Jun. 2016 MMO stand alone test at CSG : Jan. 2016 MMO Telemetry data at ESA/ESTEC and CSG will be delivered through MMO data distribution server at ISAS. Schedule

9. Page 9 MMO Orbit around Mercury Initial periherm height : 590km Initial apoherm height : 11,639km Periherm altitude will decrease with time. with 2 years operation : down to 350km

10. Page 10

11. Page 11 MEA low-energy e - MSA low-energy ion MIA solar wind ion HEP-e high energy e - HEP-i high energy ion ENA energetic neutral atom MGF magnetic field PWI radio/plasma wave/ electric field MDM dust MSASI atmosphere (& surface)‏ image Internal magnetic field Structure & Distribution Origin & Internal structure Magnetosphere Structure, Kinetics, Processes Scaling law Effect of “boundary conditions” no-ionosphere, small-scale, fast-process, & different SW Atmosphere (Exosphere)‏ Structure, Variation Production from surface Loss to solar wind & magnetosphere Surface/Crust Present structure & Evolution Interplanetary Plasma & Dust Space physics at Mercury Environment of Mercury History of Mercury Reminder: MMO Payloads MPPE, MGF, PWI, MSASI, MDM MPPE

12. Page 12 Discussion items to be re-vitalized - Data product / Data base - Inter-referencing between MMO and MPO data - Science operation / Telemetry & Data Recorder budget management Apoherm

13. Page 13 Discussion items to be re-vitalized - Rock-solidify the reason for requesting the 2 nd data reception antenna for MMO