[3] This object is also classified as a blazar because of its extreme variability on the electromagnetic spectrum[4][5] and a source of gamma ray activity.

[12] In an optical light curve, S5 1803+784 showed the overall variation greater than 3 magnitudes with the largest changes observed within three flares through no periodicity was found.

However, the radio band variability is found different, showing modest oscillations instead of flares with a maximum amplitude of 30%.

[15] Furthermore, it has a weaker secondary component located 45 arcseconds south and slightly to the west side of the core with a faint emission bridge joining them together.

[20] Interestingly, the jet is shaped into a cone which the 18-cm emission from the injector region is found to be weaken by a factor of 300.