JpGU-AGU Joint Meeting 2020

Presentation information

[E] Poster

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS02] Lunar Science and Exploration

convener:Masaki N Nishino(Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science), Masahiro KAYAMA(Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo), Hiroshi Nagaoka(Japan Aerospace Exploration Agency), Yusuke Nakauchi(Japan Aerospace Exploration Agency)

[PPS02-P05] Evaluating the thickness and stratigraphy of ejecta materials at the Chang’e-4 landing site

*Luyuan Xu1, Xunyu Zhang1, Le Qiao2 (1.State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, 2.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Shandong University, Weihai)

Keywords:Moon, Chang’e-4, impact ejecta

On 3rd January 2019, China’s Chang’e-4 (CE-4) lunar probe successfully landed on the Von Kármán crater on lunar far-side and deployed Yutu-2 rover. The Von Kármán crater is located in the highly-cratered terrain within the South Pole-Aitken (SPA), indicating the CE-4 landing site has experienced complex emplacement sequences of both near and distant ejecta materials. This complicates the interpretation of CE-4 surface in-situ measurements of the Visible and Near Infrared Spectrometer (VNIS) and Lunar Penetrating Radar (LPR) onboard Yutu-2 rover. In order to evaluate the sources and amounts of all considerable (> 10 cm in thickness) ejecta materials on the landing site of Chang’e-4, we thoroughly examine the ejecta delivered by all crater-forming events possibly occurred later than the formation of mare unit within Von Kármán crater in this study. We find a total of 20 craters throughout the Moon may deliver unneglectable ejecta (> 10 cm in thickness) superposed on the mare units of the landing site of Chang’e-4 and confirm that the ejecta from Finsen crater is the most dominant foreign materials, followed by the ejecta of Von Kármán L.