What does PPM stand for?

PPM stands for "Positions And Proper Motions (catalog)"

How to abbreviate "Positions And Proper Motions (catalog)"?

"Positions And Proper Motions (catalog)" can be abbreviated as PPM

What is the meaning of PPM abbreviation?

The meaning of PPM abbreviation is "Positions And Proper Motions (catalog)"

What does PPM mean?

PPM as abbreviation means "Positions And Proper Motions (catalog)"