There's a supermassive brown dwarf in a small orbit that seems to be shaking the entire star system.
Try increasing the time speed to 1e+007x
Code
Place "Wobbling star system"
{
Body "RS 8403-448-9-78339-1674 AAB"
Parent ""
Pos (9.776612875669563e-007, -5.385706197851611e-007, -3.170019527491263e-006)
Rot (0.1423731268443251, 0.1834225737230025, 0.9697433524746932, -0.07539152825445522)
Date "41211.04.27 15:33:34.65"
Vel 2.1798512e-006
Mode 1
}