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Asteroid 4581, a member of the Apollo group, discovered in 1989 by the American astronomers Henry Edward Holt (1929– ) and Norman Gene Thomas (1930– ). It can approach to within 0.004 AU (600 000 km) of Earth's orbit. Asclepius is about 400 m in diameter. Its orbit has a semimajor axis of 1.023 AU, period 1.03 years, perihelion 0.66 AU, aphelion 1.39 AU, and inclination 4°.9.

Subjects: Astronomy and Astrophysics.

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