Okay, so looking back at it, it seems like it is different for other objects, but it doesn't go higher than 327.67. If I move any part of a capital ship (up or down), it will stay at 327.67. I don't know... It's weird.

You can also select the object and press the p key, then check out the middle number in the Vector line. I just want the number before the decimal place. I'm curious to know where the ship was then and where it is now.

That's a neat and very useful trick! The middle number after I moved it down is 974. I'm gonna guess it was around 1200 to 1500 before I moved it, but I don't know for sure.