Program: GS-2020A-FT-203

We request to do speckle imaging with either Alopeke or Zorro to confirm or discard the duplicity of a 17 magnitude star. This distant star was occulted by a Solar System transneptunian object (TNO) were multiple occultation events were seen. This is indication of a multiple star or, more interestingly, one of the most compact multiple systems in the transneptunian region. The fraction of binary TNOs is a strong observational clue to test models of formation and evolution of the early Solar System. The proposed observation will alow us to derive an unbiased astrometric measurement of the TNO position during the occultation to improve its orbit and improve the prediction of future occultations. More than 20 occultation opportunities in the next 5 years could be exploited to further characterize this unique compact TNO system.