Too aggressive with the raise and/or flop bet?

[Meatmaw]

Is it too early to be raising with A9o UTG, and is the flop bet too small (i.e. should be large enough to make drawing incorrect)?

Seat #2 is the button
Seat 1: bonovox11 (685 in chips)
Seat 2: whitehot (1500 in chips)
Seat 3: dogshark123 (4180 in chips)
Seat 4: mdnttkr (5560 in chips)
Seat 6: HERO (1575 in chips)
dogshark123: posts small blind 50
mdnttkr: posts big blind 100

*** HOLE CARDS ***
Dealt to HERO [Ac 9h]
HERO: raises 200 to 300
bonovox11: folds
whitehot: folds
dogshark123: folds
mdnttkr: calls 200

*** FLOP *** [Jd Kd Jh]
mdnttkr: checks
HERO: bets 200
mdnttkr: calls 200

*** TURN *** [Jd Kd Jh] [2c]
mdnttkr: checks
HERO: checks

*** RIVER *** [Jd Kd Jh 2c] [9c]
mdnttkr: checks
HERO: checks

[Unarmed]

Check that flop everytime.