ZedF wrote:The split missiles tech is MWM missiles. Independents always get it for free, empires have to research it.
If the CH is already over 1000 to you, then you won't be able to settle it even if the satellite is destroyed because the Indys won't surrender to you due to environmental concerns. You will need to back off and wait for them to terraform the planet themselves down to something you can colonize.
As far as the remaining satellite goes, you can split your forces and go around both directions and see if it's closer one way than the other... or else get faster ships to do the job. Generally, as Tarka and without researching speed improvement techs, HH/armour cruisers will be your fastest ships.
Or just auto-resolve... although if it's an Independent now, that would wipe them out.
If they've only got one sat, it'll start directly in front of you. Follow it around the planet; you should be fast enough to catch it. Trying to go counterorbit will cost you all of your existing time and you won't be able to destroy it, most likely. Set your weapons to 'Only fire on my target' to avoid damaging the world, then change from 'Fighting' to 'Peace' once the sat is down and the combat should end without too much damage from planet missiles.
And yes, the 'splitting missiles' are Multi-warhead Missiles, which as Zed said, Independents get automatically. They also have Heavy Planet Missiles.