Joseph Gledhill

Joseph Gledhill (November 17, 1837 – March 20, 1906) was a British astronomer. He worked as an assistant at the Bermerside Observatory in Halifax, West Yorkshire, England.
In 1879 he co-authored the book "A Handbook of Double Stars" with Edward Crossley and Rev. James Wilson (who was later Canon of Worcester).
A crater on Mars is named in his honour.