52s from the BB, river decision

[NL__Fool]

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($60.25)
SB ($105.40)
Hero ($101.75)
UTG ($98.85)
MP ($31.20)
CO ($101.25)

No reads on villain, I made a smallish bet on the turn figuring he'd let me know right there if he had a flush or not. Do call this river? Is he going to value bet an A here?

Preflop: Hero is BB with 5[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img].
UTG calls $1, MP calls $1, <font color="#666666">1 fold</font>, Button calls $1, SB completes, Hero checks.

Flop: ($5) 2[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">Hero bets $5</font>, UTG calls $5, MP folds, Button folds, SB folds.

Turn: ($15) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $9</font>, UTG calls $9.

River: ($33) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $19</font>, Hero ??