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S.B. Karavashkin and O.N. Karavashkina

To visualise better, in Fig. 21 we show the dynamic diagram of stellar orbit precession within the galactic nucleus.

Fig. 21. Dynamic diagram showing the stellar orbit's precession within the nucleus of elliptic galaxy

Such complicated motion can occur due to the conditions under which the primary association of stars has formed when the galactic system formed. If this association was elliptic, even at the early stage there could form the average field of this association in the plane of small axis of the ellipse, and this motion, in absence of catastrophic transformations, could retain its stability.

A considerable angle of precession of the NGC 4650A disk, which amounts about 12^o to the galactic equator, is well seen in Fig. 19 and serves as an additional corroboration of such model. This angle could result only from the precession of the total dynamic field of stars of the galaxy, as well as due to disbalance of the nucleus. Galaxies of non-elliptic shape usually have not so large angle of precession.