Pogson , Norman Robert
(1829–1891) British astronomer
Pogson, who was born at Nottingham, started his career in 1852 as an assistant at the Radcliffe Observatory in Oxford. While there he discovered four new asteroids: Amphitrite in 1854, Isis in 1856, and Ariadne and Hestia in 1857. He was to discover nine in all, including the first to be discovered on the continent of Asia and consequently called Asia (1891).
In 1860 he was appointed government astronomer at Madras. He remained in India for the rest of his life, conscious of the enormous amount of observational work that could be done there. He constructed star catalogs and a variable star atlas while there.
His most lasting achievement was the introduction of Pogson's ratio. It had been realized that the average first-magnitude star is about a hundred times brighter than stars of the sixth magnitude. He therefore proposed that this interval should be represented by five equal magnitudes, that is, one magnitude would equal 5√100, which equals 2.512. This means that stars of increasing magnitude are roughly 2.5 times brighter. The system has survived in the form proposed by Pogson more than a century ago.

Scientists. . 2011.

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  • Norman Robert Pogson — Infobox Scientist name = Norman Robert Pogson box width = image width =150px caption = Norman Robert Pogson birth date = March 23, 1829 birth place = Nottingham death date = June 23, 1891 death place = residence = citizenship = nationality =… …   Wikipedia

  • Norman Robert Pogson — Astéroïdes découverts : 8 (42) Isis 23 mai 1856 (43) Ariane 15 avril 1857 (46) Hestia 16 août 1857 (67) Asia 17 avril 1861 (80) Sappho …   Wikipédia en Français

  • Norman Robert Pogson — Entdeckte Asteroiden: 8 Isis 23. Mai 1856 Ariadne 15. April 1857 Hestia 16. August 1857 Asia 17. April 1861 …   Deutsch Wikipedia

  • Pogson — Norman Robert Pogson (* 23. März 1829 in Nottingham, † 23. Juni 1891) war ein englischer Astronom. Pogson wurde 1851 Assistent am Radcliff Observatorium in Oxford. Ab 1858 war er Direktor des Hartwell Hall Observatoriums in Buckingham. Von 1861… …   Deutsch Wikipedia

  • Pogson (Asteroid) — Asteroid (1830) Pogson Eigenschaften des Orbits (Simulation) Orbittyp Hauptgürtelasteroid Große Halbachse 2.188  …   Deutsch Wikipedia

  • Norman Pogson — Norman Robert Pogson Astéroïdes découverts : 8 (42) Isis 23 mai 1856 (43) Ariane 15 avril 1857 (46) Hestia 16 août 1857 (67) Asia 17 avril 1861 (80) Sappho …   Wikipédia en Français

  • Norman Pogson — Norman Robert Pogson (Nottingham (Reino Unido), 23 de marzo de 1829  ?, 23 de junio de 1891). Astrónomo británico. Biografía A los 18 años Pogson había ya calculado las órbitas de dos cometas. En 1851 comenzó a trabajar como ayudante en el… …   Wikipedia Español

  • Norman Pogson — Norman Robert Pogson (Nottingham (Reino Unido), 23 de marzo de 1829 ?, 23 de junio de 1891). Astrónomo británico …   Enciclopedia Universal

  • Pogson —   [ pɔgsən], Norman Robert, englischer Astronom, * Nottingham 23. 7. 1829, ✝ Madras 23. 6. 1891; Direktor der Sternwarte in Madras. Nach Pogson ist die von ihm vorgeschlagene und noch benutzte Skala der Sternhelligkeiten benannt (Helligkeit) …   Universal-Lexikon

  • Pogson — Recorded as Poag, Poge, Poage, Pogue, Puig, Pogg, Pudge, Poig, and the patronymics Pogson, Poxon, and Poggs, this interesting and unusual surname is of early medieval English origin. It is one of a handful of surnames surviving which were derived …   Surnames reference

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