Physical Characteristics
Sinope has an estimated diameter of 38 km (assuming an albedo of 0.04) The satellite is red (colour indices B-V=0.84, R-V=0.46). unlike Pasiphae which is grey.
Its infrared spectrum is similar to D-type asteroids also different from Pasiphae. These dissimilarities of the physical parameters suggest a different origin from the core members of the group.
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