   $R$                            00 bad observing conditions   0    000         Jena 0.0m         $R_\textrm{B}$                 00 only first half of transit observed   0    000         Tenerife 0.0m     $r_\textrm{S}$                 00 only ingress observed   0    000         Tenerife 0.0m     $r_\textrm{S}$                 00 only 