Paul-Pierre and Mathieu-Prosper Henry

 

Prosper Henry

 

The Henrys discovered NGC 1432, the Maia Nebula (Pleiades) in Taurus and the IC 434, Horsehead Nebula in Orion (a year earlier then Fleming). NGC 1432 was first seen on a plate taken on November 16, 1885 with the 13" (f/10) photographic refractor at Paris Observatory (see below); see also On Photographs of a new Nebula in the Pleiades, MNRAS 46, 98 (1886). The nearby Merope Nebula (NGC 1435) was dicovered visually by Tempel on October 19, 1859 with a 4" refractor at Venice.

D N NI Y M D Ap I T Name Con Type S Author Title Source
1 N 1432 1885 11 16 13,0 Rr p Maia Nebula TAU RN 2 Henry, P. Decouverte d'une nebuleuse par la Photographie  AN [2702] 113, 239 (1886)
1 I 434 1887 2 28 13,0 Rr p Horsehead Nebula ORI EN 2 Mouchez Rapport Annuel sur l'état de l'observatoire de Paris pour l'année 1887  

Obituaries: Paul: MNRAS 65, 349 (1905); AN 167, 223 (1905); Prosper: MNRAS 64, 296 (1904); Pop. Astron. 11, 558 (1903); AN 163, 381 (1903)

 

13" Photographic Refractor at Paris Observatory

The Henrys at the refractor (erected in May 1885)

The Pleiades nebulae