Original description: An image of the surroundings of the comparatively bright OB star HD77581 and its (optically invisible) companion Vela X-1 was obtained...
companion Vela X-1 was obtained with the 1.54-m Danish telescope at La Silla, through a narrow-band H-alpha filter. determination method: SHA-1 described...
DescriptionVela X-1 (eso9702a) - Large.jpg English: Original description (ESO): An image of the surroundings of the comparatively bright OB star HD77581...
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