|Method||Silver Gelatin Photograph|
|Published||6th March 1933|
|Dimensions||Image 155 x 120 mm, Sheet 167 x 129 mm|
A fine telescopic photograph entitled 'Hortensius' a lunar impact crater located in the northern part of the Mare Insularum. However comparisons between this image and those taken by the Lunar Orbiter would suggest this is actually a photograph of the Copernicus crater named after the astronomer Nicolaus Copernicus, located in eastern Oceanus Procellarum.
Inscribed in ink below image 'Hortensius'.
Inscription in pencil on verso reads: 'G.D' [Gabriel Delmotte] '6.3.33'. 'd>1m.30'
Gabriel Delmotte (1876 – 1950) was a French Astronomer and Mayor of Masnières in the Nord department in France. He dedicated his scientific studies to the surface of the moon and authored the 1923 publication on selenography 'Recherches sélénographiques et nouvelle théorie des cirques lunaires'. The Delmotte crater on the moon, just north of the Crisium Sea is named after him.