Mass and orbits?

Question

Satellite A has twice the mass of satellite B, and rotates in the same orbit. Compare the two satellite's speeds.

Does A move twice as fast as B

Does B move Twice as Fast as A

Does the heavier one move 4 times as fast

or

do they both move at the same speed?

Answer 1

4. They move at the same speed. In orbit, mass has no impact. Why do you think the massive space shuttle can dock with featherweight satellites? They move at whatever speed that orbit requires to sustain that orbit. Which is usually quick. Very quick.

Answer 2

They both move at the same speed.

It is the mass of the planet they are orbiting and not the mass of the satellites themselves that makes a difference, not the mass of the satellite.

It is just like how Galileo showed that a big heavy rock falls at the same speed as a smaller, lighter rock.

Answer 3

the last one, same speed

orbit and speed are in the same ecuation relation

the mass is irrelevant

the only condition for those two bodies is that they should be one opposite the other, 180º,  or their gravity will pull them out of orbit eventually