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GRS 1747-312 is a bright Low-Mass X-ray Binary in the globular cluster Terzan6, located at a distance of 9.5 kpc from the Earth. It exhibits regularoutbursts approximately every 4.5 months, during which periodic eclipses areknown to occur. These eclipses have only been observed in the outburst phase,and are not clearly seen when the source is quiescent. Recent Chandraobservations of the source were performed in June 2019 and April, June, andAugust of 2021. Two of these observations captured the source during itsoutburst, and showed clear flux decreases at the expected time of eclipse. Theother two observations occurred when the source was quiescent. We present thediscovery of a dip that occurred during the quiescent state. The dip is oflonger duration and its time of occurrence does not fit the ephemeris of theshorter eclipses. We study the physical characteristics of the dip anddetermine that it has all the properties of an eclipse by an object with a welldefined surface. We find that there are several possibilities for the nature ofthe object causing the 5.3 ks eclipse. First, GRS 1747-312 may be an X-raytriple, with an LMXB orbited by an outer third object, which could be anM-dwarf, brown dwarf, or planet. Second, there could be two LMXBs in closeproximity to each other, likely bound together. Whatever the true nature of theeclipser, its presence suggests that the GRS 1747-312 system is unique.

A Possible Third Body in the X-Ray System GRS 1747-312 and Models with Higher-Order Multiplicity