148 reputation
17
bio website
location France
age 29
visits member for 3 years, 4 months
seen Oct 1 at 11:03

Sep
14
awarded  Popular Question
Jul
16
awarded  Notable Question
Jan
31
accepted Does Planet revolution time is always greater the more it's getting away from the center?
Jan
31
revised Does Planet revolution time is always greater the more it's getting away from the center?
precision
Jan
31
asked Does Planet revolution time is always greater the more it's getting away from the center?
Jan
30
awarded  Supporter
Jan
30
accepted How to calculate linar velocity of planet orbit?
Jan
30
comment How to calculate linar velocity of planet orbit?
This is perfect ! thanks a lot. Just to be sure , the α is always PI/2 or -PI/2 , no ?
Jan
30
comment How to calculate linar velocity of planet orbit?
@Joe ,It's determined because I choose to make all the planet rotate the same way. By the way when you talk about eccentricity , if you know a formula, it interest me a lot.
Jan
30
comment How to calculate linar velocity of planet orbit?
@JohnRennie I just notice why my result was wrong. I was using 1.49e8 instead of 1.49e11 because I use all value in km but didn't change my G constant.
Jan
30
comment How to calculate linar velocity of planet orbit?
@Joe , I know , but since I didn't found anything , I was testing this one
Jan
30
awarded  Commentator
Jan
30
comment How to calculate linar velocity of planet orbit?
@Kyle I need the "initial" velocity , I already can update the velocity using nbody. If i should add a parameter I think that should be the eccentricity since it's surely something I'll be playing with too. By the way sorry for the confusion in my question , I have some difficulties to ask technical questions in english :/. Don't hesitate to suggest edition
Jan
30
comment How to calculate linar velocity of planet orbit?
that's one of the formulas I found but when i apply it , I got extremly high result (eg: for earth fixed vector is 29.783 and generated with your formula : 941690.7474866967)
Jan
30
comment How to calculate linar velocity of planet orbit?
And what do i need ?
Jan
30
asked How to calculate linar velocity of planet orbit?
Jan
30
accepted Planet's Moon attrated by sun
Jan
29
answered Planet's Moon attrated by sun
Jan
28
comment Planet's Moon attrated by sun
i just tested that and the same happen , the moon orbit around the sun without noticing the earth , it's orbit speed is faster (because of the mass I guess). For the moon to remain in the same distance from earth , i need the force to be almost null , no?
Jan
28
comment Planet's Moon attrated by sun
the problem is that with the velocity of moon+earth , the moon do not stick around earth, it doesn't behave like a satelite of earth. (i mean by that , that the path between the two is not the same and it's visible after a little time , i can post video to see if you like