Norman Robert Pogson
|
|
Norman Robert Pogson (March 23, 1829 – June 23, 1891) was a British astronomer who worked in Oxford and in Madras, India.
In 1856 he formalized the system of stellar magnitudes, by defining magnitudes logarithmically and fixing a difference of five magnitudes as corresponding to a hundred-fold difference in brightness.
A lunar crater is named after him, and so is the asteroid 1830 Pogson.
References
- Magnitudes of Thirty-six of the Minor Planets for the first day of each month of the year 1857 (http://fulltext.ads.harvard.edu//full/1856MNRAS..17...12P), N. Pogson, MNRAS 17 pp 12 1856 in which Pogson first introduced his magnitude system
Template:Astronomer-stubde:Norman Robert Pogson sl:Norman Robert Pogson