What time and what TV channel is Ulster v Ospreys on in the URC?

Richie Murphy's Ulster bounced back from their two-game loss in South Africa by edging a tense and thrilling interpro against Connacht in Belfast last week. They are at the Kingspan Stadium tonight for a clash with Ospreys, whose last visit to Munster a fortnight ago resulted in a 23-0 defeat to Munster