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Table 1

Present physical and orbital properties of the Uranian system (Thomas 1988; Jacobson 2014).

m (M × 10−10) R (km) Trot〈 (day) J2(×10−3) C/(m0R2)
Uranus 436562.8821 25559. 0.7183 3.5107 0.2296

Satellite m (M × 10−10) R (km) Torb〈 (day) a〈 (R) 〈e〈 (×10−3) I〉 (º)

Ariel 6.291561 578.9 2.479971 7.468180 1.22 0.0167

Umbriel 6.412118 584.7 4.133904 10.403550 3.94 0.0796

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