Albedo assumptions 
When estimating the size of a NEA I have used the common albedo range of 0.05 to 0.25 at JPL because I believe it is easier to understand than the more complicated to read MPC table that includes solutions for a highly reflective body. Using common albedos 0.05 to 0.25, for an object with absmag (H) 26.5, the object would be 13-30 meters in diameter unless Wikipedia wants to use more extreme albedo values which may only further confuse the average reader. Either way this article should be consistent with how size is estimated when the precise size is not known.