In Bridge, Do You Count Defensive Points In the Opponents' Suit When Making a Takeout Double?
Nearly all American experts would not make a takeout double here, and my impression is that most Europeans would not as well.  Having 3 cards in their suit is a flaw when deciding to try and declare the hand rather than defend, and points outside their suits do matter: with only 9 points outside of their suit, your offense-to-defense ratio is low.

If opener has 6 hearts, and partner 3 or 4, your K will not take a trick on offense (it will be ruffed).  And if partner has 1 heart, the K could be useless as well.  But it will always take a trick on defense, so the heart K should be discounted slightly when considering the takeout double.  Qxx of hearts would discounted heavily because it would be useless on many hands.

There are several ways to lose by doubling here: partner has 3 hearts, partner gets you into a 4-3 minor fit, partner competes over 2H and gets you too high, partner drives to game expecting more.

Partner is still there.  He will reopen after 1H P P if he has one of the hands you want, and I would recommend playing a pre-balancing style where partner can double light after 1H P 2H... then he will protect you from having passed this hand.

In all, too many flaws: only 9 points outside their suit, poor shape, no spots, bad vulnerability.  If opponents were vulnerable that's another flaw since you might be able to get 100 or 200 by setting them.