that the best solution mentioned above is essentially the right one. This is amazing, because we only had 6 (!) transits of KOI-872b in late 2011, when this email was written (Figure 1).

[**From David K’s email on 12/1/2011:**]{}

Excellent stuff. It is frustrating that we only have 6 transits. In January we should acquire additional $\sim$10 transits so we will then have more than enough.

The TDVs are significant so I suspect there is important information in there and I look forward to seeing what happens when you fit the TTV and TDV simultaneously.

David K was rightly pointing out the importance of transit duration variations (TDVs). The lack of TDVs of KOI-872 was later used to reject the second best solution and obtain a unique fit.

[**From David N’s email on 12/9/2011:**]{}

With 6 transits it is impossible to do anything reasonable with non-coplanar systems, so I focused on coplanar planetary fits.

For the moment I looked at the semimajor axis range of the putative planet between 0.17 to 1 AU. There are 30 solutions where analytic fits to observed TTVs showed normalized chi2$<$1. This cut is arbitrary.

I would like to briefly highlight the first solution in 