N. R. Pogson
Norman Robert Pogson | |
|---|---|
| Born | 23 March 1829 Nottingham, England |
| Died | 23 June 1891 (aged 62) Chennai, India |
| Nationality | English |
| Awards | Lalande Prize (1856) |
| Scientific career | |
| Fields | Astronomy |
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 (~2.512) and referred to as Pogson's ratio.