We analyze a quiescent prominence observed by the Solar Dynamics Observatory's Atmospheric Imaging Assembly (AIA) with a focus on mass and energy flux in the spine, measured using Lyman continuum absorption. This is the first time this type of analysis has been applied with an emphasis on individual features and fluxes in a quiescent prominence. The prominence, observed on 2010 September 28, is detectable in most AIA wavebands in absorption and/or emission. Flows along the spine exhibit horizontal bands 5''-10'' wide and kinetic energy fluxes on the order of a few times 105 erg s–1cm–2, consistent with quiet sun coronal heating estimates. For a discrete moving feature we estimate a mass of a few times 1011 g. We discuss the implications of our derived properties for a model of prominence dynamics, the thermal non-equilibrium model.
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