For the object that have been thrown out...i delet them...so your computer run faster
anyways they are not anymore useful.
When you switch from jupiter mass to star mass (sun mass) all the eccentricities get to 1 so all your futur planet will collide with the star.
I start with the star because its just to readapt every object to the gravity of the star (wich is not a planet anymore). I go to the last object after because i don t want to get mix out with all the objects who are the closest to the star...Ok here some pictures that i ll show you. I use my second simulation that i m doing to show it.
1st picture aka jupiter main star
We see here a ''star'' that turn out to be a 0.42 J mass gass giant who act like the main center of this solar system. When i ll turn it to a star it will be a 0.42 Sun mass star, so you must already see that all of the orbits will be going for a crash toward the new star.
2nd picture aka proto planet a info...we see the info of this ''planet'' wich is a moon with a mass of 2.94 moon mass for now (So if i would resize everything to a 1:1 solar system model the 2.94 moon mass will get to a 2.94 earths mass planet).For the density, i ll play with it when i will resize everything to make it more realistic, i only use this random density when i add some km to the diameter of the object.
It have a sma of 689 140 km. When i ll put back this system to is full size... The orbit will get to 6 891 400 km. So imagine if I start with the closest object or any random object in the accretion disk...i will get lost easily and maybe resize the sma of object i already resize and etc... Thats why i start with the most far object in the accretion disk immediatly after i did resize the center object (the star). The excel chart i made is really useful for this lol...since i did put all the info of each objects...except for the density. In fact you just resize the mass and the sma. You put back the eccentricity, the inclination, the peri, the node and the mean, for each orbiting objects of the accretion disk.
How do i manage to add kms each 100 yrs? well i do it like that. Objects over 2000 kms in diameter i add 400 km, 1500 to 1999 kms, 200 kms; 1100 to 1499 kms, 100 kms; 1000 to 1099 kms, 50 kms; 900 to 999 kms, 25 kms. And this, i do it the 4 first 100 yrs.
the next 5 centuries: 2000 kms and + i add 200 kms; 1500 to 1999 kms, i add 100 kms; 1100 to 1499 kms, i add 50 kms and 1000 to 1099 kms i add 25 kms.
The next 6 centuries: 2000 kms and + i add 100 kms; 1500 to 1999 kms, i add 50 kms; 1100 to 1499 kms, i add 25 kms.
The next 7 centuries: 2000 kms and + i add 50 kms; 1500 to 1999 kms, i add 25 kms
And for the last 8 centuries (normally there s not many objects left in the accretion disk): 2000 kms and + i add 25 kms.
PS Everytime you save...go on your left pannel (where you can click trail, label and etc...) and before saving Delet Dust, trail and impact marks...it reduce the size of your simulation and when you open it, your universe sandbox will not crash lol.