Le 01/07/2018 à 19:37, Richard D. Saam a écrit:
m/t = F/v = 1.39 x 10^8/41,000 = 3,400 g/sec or 3.4 kg/sec

OK, but this thing has been accelerating for months... Suppose just 4
months. At this ejection rate we have

material=3.4*3600*24*30*4
35 251 200.0 Kg

For an object whose mass is 2.82e8 Kg this represents
mass=2.82e8 Kg

mass/material

7.999727

i.e. this object should have lost 1/8th of its mass in 4 months...

And we should somehow see something of those 35 thousand tons of ejected
gas.

But maybe is not a spaceship, we will never know.

There is a recent paper
"A possible flyby anomaly for Juno at Jupiter"
https://arxiv.org/abs/1711.08893v2

a team of astronomers confirms the pioneer anomaly and other spacecraft
mysterious accelerations.

Maybe this object is experiencing the same "problem"?

That would be also a big scoop, maybe more productive than just an
interstellar cargo ship passing by.

:-)

jacob