10NL - 99 in a large pot, 4 players

should I be checkign behind here?

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($1.75)
BB ($9.85)
UTG ($10.20)
UTG+1 ($10)
MP1 ($11.45)
Hero ($11.90)
CO ($2.85)
Button ($2)

Preflop: Hero is MP2 with 9, 9.
1 fold, UTG+1 raises to $0.4, MP1 calls $0.40, Hero calls $0.40, 3 folds, BB raises to $2, UTG+1 calls $1.60, MP1 calls $1.60, Hero calls $1.60.

Flop: ($8.05) 8, 7, T (4 players)
BB checks, UTG+1 checks, MP1 checks, Hero bets $9.9 (All-In)

Ni Han.

eight good outs(the 9s don't count cos they give someone else a straight), decent fold equity, two streets to come
well played