[5] The age of the stellar population in NGC 3489 shows a gradient, with the younger stars lying closer to the core.

When observed in H-beta, the central arcsecond of NGC 3489 shows a peak, indicating the presence of younger stars at the core, whose age is estimated to be about 1.7 Gys.

[9] This kind of transition emission could be attributed to post AGB stars located in the core.

[7] A supermassive black hole which accretes material in the centre of the galaxy is believed to be the cause of nuclear activity.

In the centre of NGC 3489 lies a black hole with estimated mass (6±0.54)×106 M☉ based on velocity dispersion.