Lunar occultation

The data show that at least 90% of the K-band flux of the central parsec of the Galaxy comes from about 340 compact sources. The central 16 complex is resolved into about two dozen compact sources. These are likely individual or mtdtiple stars as lunar occultation observations set limits of... 

One of the advantages of the solar occultation method is that the concentrations are derived from the measurement of a ratio of 2 fluxes, and therefore are not substantially affected by instrument calibration errors or solar spectral features. Because of the observing geometry involved, this technique provides good vertical resolution. The major limitation results from the limited number of observations due to the sunrise or sunset contraints. Better coverage can be obtained by considering, in addition, lunar and stellar occultations. 

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