# Planet name

1. Jul 6, 2008

2. Jul 6, 2008

### LowlyPion

I believe they are named for the stars that they orbit. HD is a common star name because it appears listed in the Henry Draper star catalog. Hence you see names like HD ### followed by lowercase letter designating which planet out with "a" being the closest in planet.

This is my understanding anyway.

3. Jul 6, 2008