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

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Roberts, Isaac (1829-1904), “Photographic Search for the Minor Planet Sappho [80], AD 7h 15m, D +8° 49’. 30th December 1886, exposure 60 minutes. (titre original),” Bibliothèque numérique - Observatoire de Paris, consulté le 6 novembre 2024, https://bibnum.obspm.fr/ark:/11287/3nPnv.