3C 147

3C 147 is a compact steep-spectrum quasar that was discovered in 1964. It is located in the constellation Auriga not far in the sky from the 5th magnitude star Omicron Aurigae.
The "distance" of a far away galaxy depends on the distance measurement used. With a redshift of 0.545, light from this active galaxy is estimated to have taken around 5.1 billion years to reach Earth. But as a result of the expansion of the Universe, the present distance to this galaxy is about 6.4 billion light-years.
Very Long Baseline Array observations have identified a complex central region that is dominated by two bright components, A and B. The separation between the two central components of the source seems to be increasing with an apparent velocity of 1.2 ± 0.4 c.
3C 147 is one of four primary calibrators used by the Very Large Array. Visibilities of all other sources are calibrated using observed visibilities of one of these four calibrators.