2018年の小惑星リュウグウ到着 ... - fanfun.jaxa.jp

1 2018 2017 12 14 JAXA 2 2017 7 2 2017 7 LSS 3 2017 12 14 4 3 500 km 2033 34 1 9800 km 560 km 1107 27 km S C C C C NASA OSIRIS-REx 28 31 35 600kg 26 2014 12 3 30 2018 32 2020 18 Ryugu 5 5 2018 6-7 2019 11-12 2014 12 3 2020 2015 12 3 6.

2 3 2018 6-7 7000 3900 201520162017201820192020123 10 1246 71212 (CAN/MLG)10 5 3 6 (12 3 )3 5 11 4 Ryugu (6 7 )Ryugu (11 12 ) (2020 ) (12 3 )EDVEGA 6 7 1 12 TBDTBDTBDTBDESA MLG/WLH (5 21 ,22 )7 2017 7 ONC MINERVA-II MASCOT TI 2017 9 5 8 LSS Landing Site Selection RIO Real-time Integrated Operation MNRVII-1:JAXA MNRVII-2 MASCOT DLR/CNES 2017 7 TI TI Time 2017 9 5 9 32 1 31ms 1000 1 32 4,294,967,296 4 3 2 2 10 11 2003 11 4 NICT.

3 RW2005 7 31 X RW 2005 10 3 Y RW Z RW 1 Z RW 2 4 RW RW 2005 11 12 2 2005 11 20 1 2005 11 26 2 12 1 M. Nolan Icarus 226, 629-640, 2013 Kaasalainenet al. Astronomy and Astrophysics, , (2003)Ostroet al, Meteoritics& Planetary Science 39, Nr3, 407-424, 2004 Ostroet al, Meteoritics& Planetary Science 40, Nr11, 1563-1574, 2005 NASA, European Space Agency and Philippe Lamy (Laboratoired'AstronomieSpatiale, France)ESA/Rosetta/NAVCAM 13 C C 14 GM=38m3s-2

4 GM GM 1014m3s-2 2 11km GM 450m 41cm 15201820196789101112123456 LSS #1 #2 #3 TD1TD2TD3 SCI LSS TD MNRVII-1:JAXA MNRVII-2 MASCOT DLR/CNES 16 1 TD1 2 TD2 2 TD2 TD2 TD 3 TD3 TD3 LSS LSS 17 LSS LandingSiteSelection 2 LSS MASCOT MINERVA-II TD1 10 LSS 8 BoxA 20km BoxC 5 7 km 5km LSS LSS LSS LSSDP & LSSAA LSS 100 LSSDP

5 V 7 LIDAR LSSAA LSS ONC,TIR NIRS3, LIDAR 18 LSS NEA PotentiallyHazardousAsteroid: PHA 850 880m C NEA NEA 1000 19 . LSS Ryugoid 20 368,955,296 cm 331,832 m 356 .51 36 .91 0 8 .62 GM= m3/s2.

6 LSS ONC 21 LSS ONC 22 Apple R. Burial PitMirror .. CraterM.. MontesP.. PlanitiaR.. RockWhite Hat Box A 20 km 800 m Norm Rock 0 LSS ONC 23 Snow White RegioC.. CraterM.. MontesP.. PlanitiaR.. RockLumberjack RegioSeven DwarfsLSSDP Box A LSS 24 Snow White SfM Shape from Motion LSS [DAY]LSS RA, DEC RA [ ] DEC [ ] [s] [s] ( [s]) RA DEC v0602 DEC v0710 v0728 v0806v0909v0619 LSS TD1 TD1 0 40 26TD1 Hayabusa2 P3T JAXA TD1 TD1 50 m 20 #1.

7 LSS NIRS3 27 LSSAA NIRS3 OH, H2O OH H2O LSS ONC 28 [Hiroi2011] m Fe2+ Fe3+ m LSSAA ONC LSS TIR 29 [K] 1 ABCDD2E [J m 2s 1/2K 1] [mm]LSSAA TIR Box C SfM LSS 301 LSSAA ONC Box C Box C ONC : Zone D2 (Mirror Planitia)10 1001000[km 2][m] TD m . LSS TD1 * 31 Potential LSNameMeteoritegroupHigh aqueous alterationLow thernalalterationLow spaceweatheringHigh totalCarbonHigh IOMcontentsLow BoulderdensityTo t a levaluationZone ASleepyCM+dehydrated (high T) MSC2 Zone BSnow WhiteCM (high T) 1st candidateZone CSquireCI orHydrated CM (low T) ?

8 3rd candidateZone DBildung CM? MSC 1 Zone D2 Mirror CM? ? ? 2nd candidateZone ESeven CM? 3 / absorption3 um abs depthSW indexA_390 nmA_550 nmBoulder (D > m) number in r< 50 m strabs few few v low v low < 500 weaker weak weak low low 500 10000 no abs : normal high high > 10000 strong CM Hydrated Dehydrated MSC MASCOT A_ : 3 m * LSS 32MA-1MA-2MA-3MA-4 BADED2 CMI-1 Zone B, MA-2, MI-1 Zone D2, MA-1, MI-1 TD1 MASCOT MINERVA-II C - - 33 OHor H2O 3 m 400 C 600 C m 34 NIRS3 Mogi et al.

9 2017, MetSoc CM 26 AlONC-T 35 SCISCI Small Carry-on Impactor, DCAM3: Deployable Camera 3 SCI DCAM3 NEA 1 36 JPL DB C 2 C 2 MINERVA-II DLR CNES MASCOT MASCOT 37 OSIRIS-REx B 2018 8 2023 MASCOT DLR 38

10 Web LSS 280 80 0 0 0 39 0 3 Web OK 2018 4 2018 40 2017 2018 3 2018 5 2018 6 7 8 LSS 8 OSIRIS-RE Bennu 41 2018 1 8 2018 6 4 6 21 7 5 2018 5 42 2018 2018 5 43 44 2011 2014 2014 12 3 2014 12 3-5 2014 12 6 2015 3 2 2015 3 2015 12 3 2015 12 4 2016 4 2016 Ka DDOR 45 (2014/12/3) (2015/12/3)Ryugu (2018 6-7 )Ryugu 1 2016/3/22 5/21 2 2016/11/22 2017/4/26 3 2018 m/s IES - 2015/3/3-21 IES 1244409h2015/5/12-13 IES 34242015/6/2-6 IES 22111022015/9/1-2 IES m/s 2016/3/22 2016/5/21 1 3 2 127798 h2016/11/22 2017/4/26 2 3 2 43525582018 3 2 3 400 2700 46( )X X Ka (NIRS3) (LIDAR)X (DCAM3)