What would happen if Epsilon Indi B orbited Sun, not Epsilon Indi A?

B is allegedly 1500 a. u. from A. Does someone know exactly how far in
front of or behind A, and on which orbit?

Anyway, imagine Epsilon Indi B orbiting on a circular orbit 1500 a. u.
from Sun.

Ba is allegedly 47 Jupiter masses and 1,3 milliards of years old. It is
known to have temperature of about 1000 Celsius.

Sun Ba at 4,5 milliards of years would be cooler... how much?

In any case, it would radiate no visible light.

It is about the size of Jupiter (maximum cold mass!). At 50 times the
distance to Pluto in perihelion, and roughly 60 times the diametre, it
would be slightly wider. And it would receive 2500 times less light...
meaning that in reflected light of Sun, it would be 8,5 magnitudes
dimmer. Much dimmer than Charon, Quaoar or Sedna, it would be
invisible.

Would anyone discover it as a modest source of infrared?

Or would an object spanning some 0,13 arc seconds disc and covering
some 270 arc seconds over the yearly parallax of the Earth, 20 seconds
per year on orbit, show up by occulting?

Or would it gravitationally lens the stars behind?

Also, what about Bb? Epsilon Indi Bb is known to be about 600 Celsius
at the age of 1,3 milliards of years and allegedly 27 Jupiter masses.
Would an object older than this, at 4,5 milliards of years, be
discovered in infrared?