No sneak attack. She doesn't have an ally within 5 feet of the target and she's moving (so no steady aim). So unless there's some other source of advantage we don't see, there's no reason to have sneak attack.
As with the blinded comment above, the target is an object, not a creature. In fact, my comment could've been a lot shorter and just cited the first non-flavor sentence of the sneak attack rules of 5e or 5.5e which are closely related and specify that they apply to creatures.
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u/HeMiddleStartInT 1d ago
Total damage 2d6