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Found 8 results

1. ## Burn time calculation for orbit change

Hi all, I'm searching for a while how to calculate the duration of a burn required to change orbit both for the Hohmann transfer maneuver and for circularization maneuver. I'm using KOS in KSP and after launch I have periapsis at about 85km and apoapsis at around -200km. At this point I want to write code for orbit circularization. So from my understanding I should burn until my speed at perigee will be equal to the speed at apogee and this will mean that I have close to 0 eccentricity. I wasn't able to find the calculations needed to get the deltaV needed and the burn time. Can anyone help please? Thanks
2. ## How do you calculate the time needed to reach a celestial body?

I am trying to do a mission to a planet with life support (USI), and I would love to know how to find the time it would take to reach that planet so I could balance my habitation and resources accordingly.

4. ## Hohmann Transfer

I have an equation that shows the target speed you need to reach to have a successful hohmann transfer: V = 1878968 * sqrt(2/RInitial-2/(RLowest + RHighest)) It's always worked in the past, but I recently tried to use it to find the target velocity for a transfer around the sun. When I plug in the numbers, I get a ridiculous answer of 16 m/s, and I don't know why. The weird thing is, I tried looking this formula up on Google to see if I missed something, and I cannot find it anywhere. Has anyone else used this formula?