IC 2497 is a spiral galaxy[3] close to the intergalactic cloud Hanny's Voorwerp.

[1] The galaxy is a former quasar, whose light lit up Hanny's Voorwerp, which is now a light echo of that extinct quasar.

[6] This revises current theories of quasar operation, as the quasar is quiescent, shutting down much faster than was thought possible,[7] and is much cooler than predicted.

[5] The galaxy is currently 100 to 10,000 times dimmer than it was when its quasar burned into Hanny's Voorwerp.

[8] One supernova has been observed in IC 2497: SN 2020ilb (type Ia, mag.