Opposition effect of asteroids

被引:151
作者
Belskaya, IN [1 ]
Shevchenko, VG [1 ]
机构
[1] Kharkiv State Univ, Astron Observ, UA-310022 Kharkiv, Ukraine
关键词
asteroids; photometry; opposition effect;
D O I
10.1006/icar.2000.6410
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The opposition effect behavior is analyzed for 33 asteroids with well-measured magnitude-phase curves. It is shown that surface albedo is the main factor influencing the amplitude and width of the asteroid opposition effect. The amplitude of opposition effect depends on asteroid albedo in a non-monotonic way with the maximum for moderate albedo asteroids decreasing both for dark and for high albedo asteroids. This can be explained by the combined influence of both shadow hiding and coherent-backscatter mechanisms. The relative contribution of the coherent-backscatter effect to the asteroid magnitude-phase dependence close to opposition (alpha = 0.3 degrees) is estimated to be about 20-60% for low albedo asteroids and 80-90% for high and moderate albedo asteroids. At alpha > 5 degrees the shadow-hiding effect has the dominant influence. A tendency was found for asteroids with larger U-B colors to show larger values of the opposition effect. We also compare the opposition effects of asteroids with those of some atmosphereless satellites and meteorites. (C) 2000 Academic Press.
引用
收藏
页码:94 / 105
页数:12
相关论文
共 66 条
[61]   The surface of Deimos: Contribution of materials and processes to its unique appearance [J].
Thomas, PC ;
Adinolfi, D ;
Helfenstein, P ;
Simonelli, D ;
Veverka, J .
ICARUS, 1996, 123 (02) :536-556
[62]   First lightcurve observations and rotation of minor planet 127 Johanna [J].
Toth, I .
PLANETARY AND SPACE SCIENCE, 1997, 45 (12) :1625-1637
[63]  
VERBISCER A, 1992, ICARUS, V110, P155
[64]  
VEVERKA J, 1971, PHYSICAL STUDIES MIN, P79
[65]   GROUND-BASED PHOTOMETRY OF ASTEROID-951 GASPRA [J].
WISNIEWSKI, WZ ;
BARUCCI, MA ;
FULCHIGNONI, M ;
DESANCTIS, C ;
DOTTO, E ;
ROTUNDI, A ;
BINZEL, RP ;
MADRAS, CD ;
GREEN, SF ;
KELLY, ML ;
NEWMAN, PJ ;
HARRIS, AW ;
YOUNG, JW ;
BLANCO, C ;
DIMARTINO, M ;
FERRERI, W ;
GONANOBEURER, M ;
MOTTOLA, S ;
THOLEN, DJ ;
GOLDADER, JD ;
CORADINI, M ;
MAGNUSSON, P .
ICARUS, 1993, 101 (02) :213-222
[66]   THE 8-COLOR ASTEROID SURVEY - RESULTS FOR 589 MINOR PLANETS [J].
ZELLNER, B ;
THOLEN, DJ ;
TEDESCO, EF .
ICARUS, 1985, 61 (03) :355-416