Damghan University Press Iranian Journal of Astronomy and Astrophysics 2322-4924 11 2 2024 12 02 Variable Mass of the Test Particle in the Collinear 4-Body System with Triaxial Primaries 155 167 447 10.22128/ijaa.2024.834.1184 EN Abdullah Abdullah Dyal Singh College, University of Delhi, Delhi, India Rabah Kellil Laghrour Abbes University, Khenchela, Algeria 0000-0003-2582-3612 Journal Article 2024 05 27 The mass variation effect of the test particle is studied in the collinear restricted four-body configuration with the assumption that the shapes of the three primary bodies are triaxial. It is assumed that these three primary bodies are placed in consecutive order on the abscissa axis and their axes are always parallel to the synodic ones. We also consider that the central body have solar radiation effect and whole the system is affected by Coriolis as well as centrifugal forces. Under these assumptions and using Jeans’ law, the equations of motion and quasi-Jacobian integral are determined. And hence the locations of parking points, Poincaré surfaces of section, surfaces with projection and basins of attractions are illustrated for the various values of the variation parameters .$\mu, \phi_1 , \phi_2 ,T_{11} , T_{21} , T_{31} , T_{12} , T_{22} , T_{32} , T_{13} , T_{23} , T_{33}$. Further-more the stability of the parking points are examined in the in-plane as well as in the out-of-plane. https://ijaa.du.ac.ir/article_447_91bfe6c357bb1804f3e6f8ecd5ad0d65.pdf