Trickplay Posted March 3, 2023 Share Posted March 3, 2023 I have some remarks about the orbital object data displayed in the tracking center. Please check my statements and please cut me down ruthlessly if I am wrong Eccentricity should have no unit - it is a unitless measure. Currently it shows "°" (as in degrees angle) Sidereal period is a time value and should be in seconds (or a derived unit). It now shows as m/s (as in speed) Circumference (in the Physical block) I would expect to give me the circumference of the planet itself. I have no idea what that value represents, but definitely not the circumference of the body (2 x PI x Radius of the planet). I approximated the orbital circumference, but that does not fit either. The values for planet gravity have a unit as if they are absolute values, but when I calculate based on mass and density the values for all objects seem to be off by a factor of approx. 9.80 or the earth surface gravity (g). Either use absolute values (Kerbin about 9.8 m/s^2 and Laythe about 7.84 m/s^2) or use relative values: the presented numbers but with a unit g (small letter to avoid confusion with G for Gravitational constant) Just my 2 cents to help improve the work already done. Leo Link to comment Share on other sites More sharing options...
ShadoxFilms Posted March 4, 2023 Share Posted March 4, 2023 Hey Trickplay, I'm going to add this post to the compilation post I have over at Link to comment Share on other sites More sharing options...
Trickplay Posted March 4, 2023 Author Share Posted March 4, 2023 thank you, that is fine.... At the time of this typing, you did not include the measure for Sidereal period as a timespan instead of a speed? Is my assumption wrong? Link to comment Share on other sites More sharing options...
TomKerbal Posted March 4, 2023 Share Posted March 4, 2023 (edited) 2 hours ago, Trickplay said: thank you, that is fine.... At the time of this typing, you did not include the measure for Sidereal period as a timespan instead of a speed? Is my assumption wrong? You are absolutely right . 17 hours ago, Trickplay said: I have some remarks about the orbital object data displayed in the tracking center. Please check my statements and please cut me down ruthlessly if I am wrong Eccentricity should have no unit - it is a unitless measure. Currently it shows "°" (as in degrees angle) Sidereal period is a time value and should be in seconds (or a derived unit). It now shows as m/s (as in speed) Circumference (in the Physical block) I would expect to give me the circumference of the planet itself. I have no idea what that value represents, but definitely not the circumference of the body (2 x PI x Radius of the planet). I approximated the orbital circumference, but that does not fit either. The values for planet gravity have a unit as if they are absolute values, but when I calculate based on mass and density the values for all objects seem to be off by a factor of approx. 9.80 or the earth surface gravity (g). Either use absolute values (Kerbin about 9.8 m/s^2 and Laythe about 7.84 m/s^2) or use relative values: the presented numbers but with a unit g (small letter to avoid confusion with G for Gravitational constant) Just my 2 cents to help improve the work already done. Leo yes yes the circumference values mentioned are really strange. Kerbol has a value of about 100Ly . What could that even be? Distance to next star system (too far then). 9.8 m/s^2 looks good for Kerbin gravity. Unit is (abolute of course) correct SI Unit . So if you see a factor of 9.8 the shown value is a relative factor to Kerbin gravity. Then clearly this value is not allowed to have a unit at all. Edited March 4, 2023 by TomKerbal Link to comment Share on other sites More sharing options...
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