I'm thinking about the challenges involved in developing a single metric of #spacesustainability or #spacedebris. A key issue is that the combination of different factors will largely be subjective (e.g is lifetime more important than mass?)
Then whomever decides how to achieve this combination will potentially influence the usefulness, the outcomes of its use, and perhaps the future of our space environment. So, who do you trust to make this decision? Should satellite operators be included?
However it is approached, the subjectivity will probably divide opinion
Sustainability ratings are a lot like university league table rankings: a combination of different factors that can be used by prospective students to make decisions about their future. The newspapers decide how those factors are combined. What do you think their motives are?
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