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Asteroid 288, discovered in 1890 by the German astronomer (Karl Theodor) Robert Luther (1822–1900). Glauke is an S-class asteroid of diameter 32 km. It is the slowest-spinning asteroid known, with a tumbling rotation period of 50 days. Its orbit has a semimajor axis of 2.756 AU, period 4.57 years, perihelion 2.18 AU, aphelion 3.33 AU, and inclination 4°.3.

Subjects: Astronomy and Astrophysics.

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