Air Traffic Control Developmental
Communication Breakdown; Situational Awareness; Other / Unknown
ATC Issue All Types; Conflict Airborne Conflict
Air Traffic Control Issued New Clearance
Procedure; Human Factors
During an arrival push; while working arrivals; a CRJ-200 was inbound to CVG via the TIGRR fix at 110; heading approximately 230. When the CRJ was 1 mile from my boundary; I noticed an untagged aircraft; on a discrete beacon code; 7 miles SW of the CRJ's position; indicating 100; eastbound. I gave the CRJ a vector of heading 255 and immediately issued traffic. As soon as I issued the vector; I noticed the target appeared to have turned northbound and was still climbing. I issued a vector of H270 to the CRJ and once again issued the traffic; this time at 12 o'clock and 2 miles; out of 106 and still climbing. My trainer stepped in and issued a traffic alert and a climb to the CRJ; who then told us he was responding to a RA and would miss the aircraft by 1;000 feet. Recommendation; I suspect this unknown aircraft was a skydiving aircraft; operating out of Waynesville airport; which our facility does not have a LOA with. This company needs to be notified that even if they are VFR; anything above 100 is a bad place to be at the inbound fix. I'm not sure why the aircraft was on a discrete code; or who was working the aircraft.
CVG Controller described a TCAS RA event between an IFR air carrier arrival and a non-identified target on a discrete code a likely skydiving aircraft.