Spacecraft: Electronics, and Sensitive Probing
1. Now that I think of it, I don't think I've ever seen a comprehensive, and sensible, sensor table.
2. I tend to think size, movement, and noise, would be the primary means to detect an object in space.
3. I guess borrowing targetting modifiers would be the initial step.
4. Short range would add a plus one, long minuses off two, very minuses off four, and distant minuses off six.
5. Every full kilotonne of the target, you add one.
6. Which caps at plus six, for six kilotonnes.
7. Rapid change in position would depend on how long an area of space has been under observation.
8. You note that by that rapid movement in space, a detected object attracts attention.
9. Or, by rapid movement, it becomes detectable.