If you add h48 to your chart elements on astro.com (this is on the Extended Chart Selection, scroll down and you will see a yellow box, enter h48 there, and it will bring up "Isis" on the chart - note: h48 TransPluto Isis is not the same as asteroid Isis), you should see it. It is a hypothetical planet, but which many appear to have found "works".do you know where you can find the placements of transpluto ?
Here is one article, by Lynn Koiner:
TRANSPLUTO IS REAL! • Lynn Koiner - Astrological Research
In 1972, I obtained the first Transpluto ephemeris which was published in Germany by the highly respected astrologer/scientist, Theodor Landscheidt. Relying
www.lynnkoiner.com
There are, however, other astrologers who scoff at the notion that any hypothetical planet has any validity whatsoever, but I believe TransPluto was posited owing to anomalous orbits by some observers so I would not be amongst those who dismiss it.
Having said that: if it works in a chart, then use it.
Wehrman mentions another book about it, which refers to "Bacchus", and discusses its rulership of Taurus.
It moves extremely slowly and thus, from the perspective of her system, works for her purposes when contacting/aspecting a transiting planet, natal planet, a cusp or a midpoint, closely.
I have it natally in a prominent place and I have also really felt it as it aspected something in my natal chart by transit.