n_r_pogson | nationality | england <sep> norman robert pogson, cie (23 march 1829 – 23 june 1891) was an english astronomer who worked in india at the madras observatory he discovered several minor planets and made observations on comets he introduced a mathematical scale of stellar magnitudes with the ratio of two successive magnitudes being the fifth root of one hundred (~2512) and referred to as pogson's ratio 
n. r. pogson was english.no information