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Créateur est exactement "Roberts, Isaac (1829-1904)"

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Cygnus, AD 19h 55m, D 37° 45’. Photographed 24th August 1886, exposure 60 minutes, 20’’ Reflector (titre original)

Cygnus, AD 19h 55m, D 37° 45’. Photographed 24th August 1886, exposure 60 minutes, 20’’ Reflector (titre original)

Mots-clés: Constellations

Photographic Search for the Minor Planet Sappho [80], AD 7h 15m, D +8° 49’. 30th December 1886, exposure 60 minutes. (titre original)

Photographic Search for the Minor Planet Sappho [80], AD 7h 15m, D +8° 49’. 30th December 1886, exposure 60 minutes. (titre original)

Mots-clés: Astéroïdes

Nebulae in Orion, Exposure 1h 7m, enlarged 5 times, 30th November 1882 (titre original)

Nebulae in Orion, Exposure 1h 7m, enlarged 5 times, 30th November 1882 (titre original)

Mots-clés: Nébuleuses

Nebulae in the Pleiades, 24th October 1886, exposure 3 hours, enlarged 5 times (titre original)

Nebulae in the Pleiades, 24th October 1886, exposure 3 hours, enlarged 5 times (titre original)

Mots-clés: Amas| Etoiles

Photographic Search for the Minor Planet Sappho […], 14th January 1887, exposure 60 minutes (titre original)

Photographic Search for the Minor Planet Sappho […], 14th January 1887, exposure 60 minutes (titre original)

Mots-clés: Astéroïdes

Photograph of the Nebula 405 Persei […]. Exposure 90 minutes, on the 14th Januay 1902 (titre original)

Photograph of the Nebula 405 Persei […]. Exposure 90 minutes, on the 14th Januay 1902 (titre original)

Mots-clés: Nébuleuses

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