NGC 4340 is a double-barred lenticular galaxy[2][3] located about 55 million light-years away[4] in the constellation of Coma Berenices.

[6][7] NGC 4340 has a small inner bar embedded in a luminous stellar nuclear ring.

[3] Careful inspection shows that the two bars are slightly misaligned, which suggests they may be independently rotating.

[2] The larger primary bar connects to another ring that surrounds the central regions of the galaxy.

[7] One supernova has been observed in NGC 4340: SN 1977A (type unknown, mag.