Crj-900 flight crew reported an airborne conflict with a drone on descent to landing at atl airport.

Attributes
ACN	1638522
Time
Date	201904
Local Time Of Day	0601-1200
Place
Locale Reference	ATL.Airport
State Reference	GA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR HOBTT2
Flight Plan	IFR
Aircraft 2
Make Model Name	UAV - Unpiloted Aerial Vehicle
Person 1
Function	First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict Airborne Conflict

Narrative:

Passing ensll while level at 12;000 feet on the HOBTT2 arrival into atl; I observed an object appearing to be a consumer type drone pass off the right of the aircraft. I estimated that the object was approximately two (2) miles away; and approximately 1;000 feet below our altitude. The object was reflecting the sun and was hard to distinguish any identifying features. I immediately notified ATC; approach; who advised the aircraft behind us. An aircraft behind us also spotted the object; concurred that it appeared to be a drone; and also noted that it appeared to be traveling southbound. Near collision with object appearing to be a drone; insufficient time to react.

Original NASA ASRS Text

Title: CRJ-900 flight crew reported an airborne conflict with a drone on descent to landing at ATL airport.

Narrative: Passing ENSLL while level at 12;000 feet on the HOBTT2 arrival into ATL; I observed an object appearing to be a consumer type drone pass off the right of the aircraft. I estimated that the object was approximately two (2) miles away; and approximately 1;000 feet below our altitude. The object was reflecting the sun and was hard to distinguish any identifying features. I immediately notified ATC; Approach; who advised the aircraft behind us. An aircraft behind us also spotted the object; concurred that it appeared to be a drone; and also noted that it appeared to be traveling southbound. Near collision with object appearing to be a drone; insufficient time to react.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.