> for which you need essentially just the brightness and distance Parallax, which I mentioned, can be used for measuring the distance. I'm asking if there are

> for which you need essentially just the brightness and distance Parallax, which I mentioned, can be used for measuring the distance. I'm asking if there are better alternatives for getting the distance. For objects that are sufficiently far or slow moving, we can use Earth's natural movement to get some 2 AU of parallax base. Simply wait half a year before pointing the telescope at the object again. But, for things that move fast enough and are close enough to get some arc offset, we'll get wrong results. Which maybe isn't a problem, because we can detect such movement outright? I literally have no intuition how the math here works out. Hence asking.