HD 88986

Traversing the HD starcatalogue, Warwick Uni are onto #88986. Here's a wide-ish orbit planet as transits. This cycle's length is 146 days, which orbit would be subVenus here but still, catching transits at 146 days apart is quite a stroke of luck (and of patience).

Radial calculations hit up 17 Earth masses, and we know its inclination so... sini=1, 17 Earth masses indeed. Its disc is twice Earth radius, so the planet is deemed a "sub-Neptune". It is denser than Uranus our own miniNeptune. As I suppose it would be; they're estimating 460s K temperature, although I suspect that figure comes from stellar flux. UPDATE 6/15: This needs to be considered like Gliese 3470 b, sulfurous Sudarsky II.

Also possible in this system is a... body, at 100 Jupiter masses. I do not think this body transits. That has to be a minimum mass. The body has to be a browndwarf at least. And we haven't seen its electromagnetic signals.

So it is not stellar. As a browndwarf it is not young. It hasn't blasted visible aurora. sini is close to 1, like HD 88986 b.