3C 303

3C 303 is a Seyfert galaxy^[1][2] with a quasar-like appearance located in the constellation Boötes.

3C 303
Observation data (Epoch J2000)
Constellation	Boötes
Right ascension	14h 43m 02.76070s[1]
Declination	+52° 01′ 37.2982″[1]
Redshift	0.141186[2]
Distance	564 megaparsecs (1.84×109 ly) h−1 0.73[2]
Type	Sy1, Rad, AGN, IR, X, AG?, QSO, G[1] G, FR II, Sy 1.5[2]
Apparent magnitude (V)	18.29[1]
Other designations
DA 369, 3C 303, QSO B1441+5214
See also: Quasar, List of quasars

3C 303 is also a radio galaxy^[3] It also contains an extragalactic radio source.^[4] A clear defined jet is also seen, showing a polarization variation trend. With a diffuse patch of optical emission located at the intersection of the jet where a radio lobe is connected, the jet is confirmed to target a region of interstellar medium.^[5]