NGC 5278 is a spiral galaxy in the constellation Ursa Major.

In addition, NGC 5278 is possibly a LINER galaxy, a galaxy whose nucleus presents an emission spectrum characterized by broad lines of weakly ionized atoms.

[3] NGC 5278 is also a galaxy whose core shines in the ultraviolet spectrum.

It is listed in the Markarian catalog under the reference Mrk 271 (MK 271).

[4] Two supernovae have been observed in NGC 5278: SN 2001ai (type Ic, mag.