# Configuration Issues & Known Bugs

## Active TODOs:
- ⚠️ **TODO**: Update configs/solar_system.txt to new 12-field format
- ⚠️ **TODO**: Update configs/example_binary_star.txt to new 12-field format
- ⚠️ **TODO**: Fix Moon and Jupiter's moons positions in solar_system.txt

## Fixed Issues:
- ✅ Eccentric orbit support added
- ✅ Binary star barycenter calculation
- ✅ Refactored main.cpp into focused functions
- ✅ Initial state capture in headless mode

## Known Issues:

### Solar System Configuration Issues:

**Moon position is incorrect (configs/solar_system.txt)**
- Earth at: `(1.496e11, 0, 0)` m
- Moon at: `(1.500e11, 0, 0)` m
- Distance: ~4M km, should be ~384,400 km (~3.844e8 m)
- Should be at: `(1.496e11 + 3.844e8, 0, 0)` approximately

**Jupiter's moons positions (configs/solar_system.txt)**
- Io, Europa, Ganymede, Callisto all positioned incorrectly
- Currently use absolute coordinates, should be relative to Jupiter
- Example: Io at `(8.207e11, 0, 0)` - 422M km from Jupiter (should be ~422,000 km)

### Implementation Notes:

**Coordinate system**: All positions are absolute (heliocentric), not relative to parent
**Velocity calculation**: Uses vis-viva equation: `v = sqrt(G*M*(2/r - 1/a))`
**Orbit plane**: All orbits calculated in XY plane (Z-axis perpendicular)

## Future Improvements:

### Validation:
- Add config file validation to warn about incorrectly positioned child bodies
- Check for unrealistic orbital parameters

### Features:
- Consider relative coordinate option for child bodies
- Add 3D orbit support (currently all orbits in XY plane)