We measured the (26)Al-(26)Mg isotope systematics of a similar to 5-micrometer refractory particle, Coki, returned from comet 81P/Wild 2 in order to relate the time scales of formation of cometary inclusions to their meteoritic counterparts. The data show no evidence of radiogenic (26)Mg and define an upper limit to the abundance of (26)Al at the time of particle formation: (26)Al/(27)Al < 1 x 10(-5). The absence of (26)Al indicates that Coki formed >1.7 million years after the oldest solids in the solar system, calcium-and aluminum-rich inclusions (CAIs). The data suggest that high-temperature inner solar system material formed, was subsequently transferred to the Kuiper Belt, and was incorporated into comets several million years after CAI formation.