Found this out on the message board about Cartoons and they said that Astro had his own show. I learn something new everyday-lol I think it was in 1981.

I did not know that.

Neither did I.

That's true. ASTRO AND THE SPACE MUTTS premiered on NBC in 1981. I
haven't seen it, but it is mentioned in William Hanna's biography, "A CAST OF
FRIENDS" (1996).

from what I have read about it, it wasn't a full half hour series. It sounds like it was just a segment of the show Space Stars. I don't know how long the segments were but they made 11 episodes of it.

Here are some links
http://www.toonarific.com/show.php?show_id=310
http://ficklinm.com/ASTROSPACEMUTTS.HTML
http://www.bcdb.com/cartoons/Hanna-Barbera_Studios/S/Space_Stars_with_the_Teen_Force_and_Astro_and_the_Space_Mutts/index.html