gravity depending of height

[Skalou]

hello,

i would like to know what is the gravity(g) at differents altitudes, does the IRL formula works for KSP?

Do you have a number for G(the big one)? or at least some g (the small) references, for exemple g/Kerbin-asl=1 (=9.81m/²) ,g/Kerbin-100km=?

thank you

Edit:

Argh sorry i am in the wrong section, i wanted to post it in the "General KSP Discussion"

so is there a modded part displaying it?

Edited June 19, 2015 by Skalou

[monstah]

g @ Kerbin ASL = 9.81m/s² as in Earth, radius is 600km (or is that the diameter? damn). So G*kerbin mass= 9.81*600² (or 300²...), from there you can calculate at any height

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Also, the Gravioli Detector is a stock part that measures it

[Skalou]

g @ Kerbin ASL = 9.81m/s² as in Earth, radius is 600km (or is that the diameter? damn). So G*kerbin mass= 9.81*600² (or 300²...), from there you can calculate at any height

- - - Updated - - -

Also, the Gravioli Detector is a stock part that measures it

Woow, i'm so ashamed now to didn't remember this

and you are right, i can do my own science,

so, that's what i've done:

-experiment in KSP with the Gravioli Detector on Kerbin:

on the launchpad; g0=9.81m/s²

g in orbit at the altitude of 100 000m; g100 000=7.21m/s²

g in orbit at the altitude of 1 000 000m; g1 000 000=1.38m/s²

from the wiki:

[TABLE]

[TR]

[TD=colspan: 2] Mkerbin=[/TD]

[TD] 5.2915793×10²² kg[/TD]

[/TR]

[/TABLE]

r=Kerbin radius + altitude

Kerbin radius= 600 000m

the calculs are ok with G=6.674x10^-11 (maybe [m]^3/^2/[kg] )

the G is different of the Standard gravitational parameter from the wiki: 3.5316000×10¹² m³/s²

thank you for your answer, that's why i like forum , i could have scratched my head many times...

Edit:

hey, i understand better why we are accelerating so slow at an high Ap of an elliptic orbit now.

Edited June 19, 2015 by Skalou

[TheShadow1138]

G=6.674x10^-11 (maybe [m]^3/^2/[kg] )

the G is different of the Standard gravitational parameter from the wiki: 3.5316000×10¹² m³/s²

Just thought I'd clarify a bit here. The G, sometimes called "Big G" is the "Universal Gravitational Constant", which is 6.67 x 10^-11 with units of m³/kg/s².

The "Standard Gravitational Parameter" is the product of a body's mass and the Universal Gravitational Constan (M*G). So this wiki's quoted value of 3.5316000 x 10¹² m³/s² is the product of Kerbin's mass and Big G:

(5.2915793 x 10²²kg * 6.67 x 10^-11m³/kg/s²) = 3.5316000 x 10¹² m³/s².

[Requia]

The mass and GM (this saves so much calculator button pushes) of all celestial bodies is listed if you click the buttons on the right in the tracking station, or focus on the body in map mode.