Examining the proper motion of Ross 248 has found no evidence of a brown dwarf or stellar companion orbiting between 100–1400 AU,[17] and other unsuccessful searches have been attempted using both the Hubble Space Telescope Wide Field Planetary Camera[6] and by near-infrared speckle interferometry.[18] Long-term observations by the Sproul Observatory show no astrometric perturbations by any unseen companion.[16]