The 33-year old former Republic of Ireland international joined the Royals from Carlisle United in August last year and has been a major factor for the club's turn around in form in the second half of the season.
Harte's eight league goals, four of which have come since late January, have helped Reading fight back into the top half of the standings and Federici was only full of praise for the former Leeds United star.
"He's been fantastic. He's good to have off the pitch as well," the Australian gloveman told tribalfootball.com.
"He's a great guy and a great family man and he adds that bit of experience into the team and obviously he has played a lot of games. I'd say he's got one of the best left foots that I've ever seen and the last games especially, he has scored a few magnificent goals."