good time to run a bluff?

[skillzilla]

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $100
BB: $100
UTG: $131.95
MP: $93
CO: $100
<font color="black">Hero (BTN): $151.55</font>

<font color="black">Preflop:</font> Hero is dealt A[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] (6 Players)
<font color="red">UTG raises to $4</font>, MP folds, CO calls $4, Hero calls $4, SB folds, BB calls $3

<font color="black">Flop:</font> ($16.50) Q[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (4 Players)
BB checks, UTG checks, CO checks, Hero checks

<font color="black">Turn:</font> ($16.50) 9[img]/images/graemlins/spade.gif[/img] (4 Players)
BB checks, <font color="red">UTG bets $11</font>, CO folds, Hero calls $11, BB folds

<font color="black">River:</font> ($38.50) K[img]/images/graemlins/diamond.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $23</font>

[All_Inn_Aces]

What do we know abotu mister UTG?
Average villain will bet turn hoping to take down pot after checked flop, especially as PFR
Not too bad a spot IMO