Also, Sedna's initial orbit must have been approximately circular, otherwise its formation by the accretion of smaller bodies into a whole would not have been possible, because the large relative velocities between planetesimals would have been too disruptive.
Ademais, a órbita de Sedna inicial debería ser circular, en caso contrario, a súa formación por acreción de corpos menores nun corpo maior nunca tería sido posible, xa que as diferenzas das velocidades relativas entre os planetesimais terían sido moi grandes.