Japan Geoscience Union Meeting 2016

Presentation information


Symbol O (Public) » Public

[O-02] Poster presentations by senior high school students

Sun. May 22, 2016 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Miwa Kuri(International Research Institute of Disaster Science, Tohoku University), Keiko Konya(Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology), Hajime Naruse(Department of Geology and Mineralogy, Graduate School of Science, Kyoto University), Kou Yamada(Waseda University)

1:45 PM - 3:15 PM

[O02-P35] Surface properties of asteroids inferred from light curves and 3-D models.

*Kentaro Tsuchiya1 (1.Nasu-kogen Kaijo High School)

Keywords:Asteroid, Lightcurve, 3-D model

Generally, surface properties of asteroids are observed by a spectral photometry or a spacecraft.
However, we thought that surface properties of asteroids might be inferred from light curves and 3-D models.
Our method is as follows. (1) We observed asteroids (using 65cm reflector) and made a light curve. We call it “Light curve by observation”. (2) We measured sectional areas of asteroid 3-D models. (3) We made a line graph about a change on standing of the sectional area. We call it “Light curve from 3-D models”. (4) We compare those two kinds of light curves.
It is considered that if those light curves indicate good agreement, the surface properties of an asteroid are homogeneous. If those light curves indicate disagreement, the surface properties of an asteroid are heterogeneous.
It was concluded that (1) the flux ratio (amplitude) of the observed light curve agrees with that calculated from 3-D models, (2) sectional areas of an asteroid can be regarded as flux of an asteroid, (3) surface properties (geology, geomorphology) of an asteroid can be inferred from light curves and 3-D models.