William Lassell

18 June 1799 – 5 October 1880 OTT

Businessman (beer brewery) and amateur English astronomer who discovered Ariel, Umbriel and Triton. He also co-discovered Hyperion.

Pioneered the use of equatorial mounts for astronomy telescopes.

Elected a fellow of the Royal Society of London in 1849 OTT

President of the Royal Astronomical Society from 1870 to 1872 OTT.

The crater Lassell on Luna, a crater on Mars, the asteroid 2636 Lassell and a ring of Neptune are named in his honor.