HD 219134 Revisited: Planet d Transit Upper Limit and Planet f Transit Non-Detection with ASTERIA and TESS

HD 219134 is a K3V dwarf star with six reported planets discovered by the radial velocity method. The two innermost planets HD 219134 b and c show transits, raising the possibility of the HD 219134 system to be the nearest (6.53 pc), brightest (V=5.57) example of a star with a compact multiple transiting planet system. Ground-based searches for transits of planets beyond b and c is not feasible because of the infrequent transits, long transit duration (~5 hours), shallow transit depths (< 1%), and large transit time uncertainty (~ half a day). We use the space-based telescopes ASTERIA and TESS to search for transits of planets HD 219134 f (P =22.717 days and M_sin(i) = 7.3 +/- 0.04 M_Earth) and d (P = 46.859 days and M_sin(i) = 16.7 +/- 0.64 M_Earth). ASTERIA was a technology demonstration CubeSat with an opportunity for science in an extended program. ASTERIA observations of HD 219134 were designed to cover the 3-sigma transit windows for planets f and d via repeated visits over many months. While TESS has much higher sensitivity and more continuous time coverage than ASTERIA, only the HD 219134 f transit window fell within the TESS survey's observations. Our TESS photometric results definitively rule out planetary transits for HD 219134 f. We do not detect the Neptune-mass HD 219134 d transits and our ASTERIA data are sensitive to planets as small as 4.1 R_Earth. We provide TESS updated transit times for HD 219134 b and c, which are designated TOI 1469.01 and 1469.02 respectively.