Positive on glass

Made:
1906 in Crowborough
photographer:
Isaac Roberts

Positive on glass, enlarged at the National Observatory in Paris, of: Spiral nebula M.51 Andromedae (R.A. 0h. 37m. 17s. Dec.N.40 degrees 43.4') enlarged 3.4 times, scale 1mm to 24 seconds of arc, taken near Liverpool, December 29th 1888 between sidereal time 1h. 38m. and 5h. 45m, with an exposure of 4 hours.

Details

Category:
Astronomy
Object Number:
1906-85
Materials:
glass
type:
black-and-white prints (photographs), astrophotographs and galaxies
credit:
Mrs. Isaac Roberts