This was detected by Energetic Gamma Ray Experiment Telescope (EGRET) in the year 1995, where its outburst in the energy range above 100 MeV lasted for a period of five weeks.

[13] Radio images made of the object via Very Long Baseline Interferometry observations showed the source having an elongated structure towards the west on parsec scales.

[15] However a VLBI Space Observatory Programme (VSOP) image shows it having a weak component and a strong core.

In an Australia Telescope Compact Array (ATCA) imaging at 4.8 GHz, the source has a bright core with strong extended emission in form of two components.

[16] The supermassive black hole in PKS 1622-297 is estimated to be 8 x 108 Mʘ with the limit of the Schwarzschild radius being Rg > 2.5 x 1014 centimeters.