[5] In the large arms of the galaxy have been observed 28 HII regions that may host young massive star clusters, and for two of them the nebular emission comprises most of the flux.

[6] Observations in the ultraviolet showed 78 star forming regions, with two of them between the spiral arms and six at the galaxy ring.

[7] Scattered dust lanes which do not fit into a spiral structure have been observed in the nuclear region of the galaxy.

[5] In the centre of NGC 2336 lies a supermassive black hole whose mass is estimated to be 30 million (107.5) M☉ based on Ks bulge luminosity.

[14] Spectrography performed by William Herschel Telescope on 20–21 October 1987 concluded that it was a type Ia supernova with its maximum approximately 100 days before.