Exoplanet discoveries have demonstrated a vast range of planetary system architectures .
The demographic of compact planetary systems are especially interesting from the perspective of planetary formation and the evolution of orbital dynamics .
Another interesting demographic is that of giant planets in eccentric orbits , since these planets have likely had a dynamical history involving planet-planet scattering events .
The WASP-47 system is particularly fascinating since it combines these two demographics , having both compact planetary orbits and a giant planet on an eccentric orbit within the system Habitable Zone .
Here we provide an analysis of the WASP-47 system from the perspective of atmospheric detection and characterization .
We discuss the system architecture and the potential for additional long-period planets .
We simulate expected phase variations as a function of planet orbital phase for the system due to the combined effect of the planets .
We present an analysis of precision photometry of WASP-47 from the K2 mission , phased on each of the planets .
The analysis rules out the detection of phase signatures for the two inner-most planets , enabling constraints upon their albedos and atmospheric properties .
Our study concludes that WASP-47b is an example of a “ dark ” planet with a tentative geometric albedo of 0.016 and a 1 \sigma upper limit of 0.17 .
The WASP-47e data are consistent with a broad range of albedos , but also show early evidence of having a relatively low albedo .
The growing number of dark , short-period giant planets provide the framework of an ideal sample for studying low albedo dependence on atmospheric composition .