153 Hilda

153 Hilda is a large asteroid in the outer main belt, with a diameter of 170 km.

[4] It was discovered by Johann Palisa on 2 November 1875, from the Austrian Naval Observatory at Pula, now Croatia.

It is not a true asteroid family, since the members are not physically related, but rather share similar orbital elements.

[6] The asteroid is, however, the largest member of the ancient physically related Hilda family within the dynamical group of the same name.

[1] Multiple light curves of the asteroid provide a consistent rotation period of approximately 5.9585 h[7]

A schematic of the orbit of 153 Hilda (green), with Jupiter (red). The open red circles are the Jovian Lagrange points that Hilda approaches. ^{[

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