V723 Monocerotis is a variable star in the constellation Monoceros.

It was proposed in 2021 to be a binary system including a lower mass gap black hole candidate nicknamed "The Unicorn".

[1] Located 1,500 light years from Earth, it would be the closest black hole to our planet, and among the smallest ever found.

[8][9] Located in the Monoceros constellation, V723 Monocerotis is an eighth-magnitude ellipsoidal variable yellow giant star roughly the mass of the Sun, but 25 times its radius.

[10][11] Follow-up work in 2022 argued that V723 Monocerotis does not contain a black hole, but is a mass-transfer binary containing a red giant and a subgiant star that has been stripped of much of its mass.