And I would be absolutely right

so you think that as long as the spacecraft's or satellite's mass is of no concern then you could double or tripple its mass and that extra mass would not require any adjustments to the velocity to remain in that orbit?

or you could decrease its mass and the same would be true?

suppose our moon were to suddenly shrink its mass to 1/10 of what its mass is today , would it remain in its current orbit without the need to increase or decrease its orbital velocity?

I say that by increasing its mass without changing its orbital velocity , the moon would increase its orbit.

it would reach escape velocity if the moons mass is increased too much.

I think.

I wonder why this guy uses a small "m" to represent a

orbiting satelite?

and a large "M" to represent the earth?

http://www.youtube.com/watch?v=Ky2XIElijvs do you think that if we plug in different sized masses

into the small "m" the answer will always be exactly the same?

or could you possibly be wrong?

try it out and see just plug in the sun's mass

and the earth's mass.

then use the same and plug in double and tripple the earths mass.

then shrink the earths mass to 1/10th its mass today.

theres one thing you can rely on , the velocities will differ in each case because the mass is different in each case.

but you must somehow figure out how to keep the different earths with the different masses in the same orbit without changing their orbital velocity.

let me know what you find.

I plugged the above formula into a excell spreadsheet

and then I changed the values of m1 and the orbital velocity did not remain the same , I wonder why?

perhaps everybody is wrong except you !

I decreased the value of m1 the orbiting mass

and the orbiting velocity increased !

the values I used are as follows

m1 mass 7.3477 * 10^22

m2 mass 5.9736 * 10^24

moons perigee 362,570 km

the result was

12,629,335,298

then I replaced the m1 mass of 7.4377 * 10^22

with

m1 mass of 5.0 * 10^22

and the result changed to

12,653,922,800

this tells me that a heavier satellite needs to have a slower orbital velocity than a lighter satellite when occupying the same orbital distance.

that is why I said

they must be extremely heavy to just remain orbiting the sun at such a close proximity otherwise they would need a tremendous velocity to remain in orbit.