Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Distraction; Situational Awareness
Airspace Violation All Types; Conflict NMAC; Deviation / Discrepancy - Procedural Unauthorized Flight Operations (UAS); Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; General Police / Security Involved
Environment - Non Weather Related; Human Factors
While descending on the ZZZZZ Arrival into ZZZ about halfway between ZZZZZ1 and ZZZZZ2; we were descending through 12;400 ft. for 12;000 ft.; and we had what looked like a drone pass off our left side about 200 ft. or so away. We did not have to do any evasive maneuvers. It appeared to be black and silver and cylindrical with what appeared to be the little drone rotors.  It was right around the tops of the cloud layer. We reported it to ATC about 15 seconds later. A little while after reporting it ATC asked us what gate we were planning on. We told them [gate] XX. After landing and taxiing to the gate; [authorities] met us in the jetway and asked us about what we saw. I repeated the events just as I have written here to him.What appeared to be a drone was just above the cloud layer near our flight path on the ZZZZZ Arrival in to ZZZ. Drones should not be near commercial aircraft.
CRJ200 Captain reported a near miss with a UAS while on descent to a Class B airport and reported to ATC.