Don't quote me but I believe the Kel Dor is on Tython. There is either a master that gives you a quest or the one that gives you the Heroic I believe.
If it the heroic you have to finish the heroic and then come back.
I am not 100% sure I'm right though.
The only heroic available on Tython is given by a Zabrak if memory serves me right, not a Kel-Dor.