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# SpecificTypeQuantity

class astropy.units.SpecificTypeQuantity(value, unit=None, dtype=<class 'numpy.inexact'>, copy=True, order=None, subok=False, ndmin=0)

  Bases: `Quantity`

  Superclass for Quantities of specific physical type.

  Subclasses of these work just like `Quantity`, except that they are for specific physical types (and may have methods that are only appropriate for that type). Astropy examples are `Angle` and `Distance`

  At a minimum, subclasses should set `_equivalent_unit` to the unit associated with the physical type.