That is the objects that are big enough for us to track somewhat reliably (10cm+). Based on models produced by ESA's space debris office, it is estimated that t

That is the objects that are big enough for us to track somewhat reliably (10cm+). Based on models produced by ESA's space debris office, it is estimated that there are 1 million objects between 1-10cm and an 130 million objects between 1mm to 1cm.