Is Virgo A a Star?

The Problem. You have been given telescope time on the 140 Foot Radio Telescope to observe an object called 3C274, or Virgo A. This object is in the constellation Virgo, and it is very bright. You make an image of Virgo A and it looks like this.

Predict: Is it a star or some other kind of object?

What makes you think so...

Or, Why don't you think so?

color brightness scale