Gpt TRACON controller reported descending aircraft below the MVA.

Attributes
ACN	1725351
Time
Date	202002
Local Time Of Day	1801-2400
Place
Locale Reference	GPT.Tower
State Reference	MS
Aircraft 1
Make Model Name	Regional Jet 900 (CRJ900)
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Other Instrument Approach
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Developmental
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

After turning and descending the crj-900 I was dealing with a VFR south east of gpt that had traffic coming at him and didn't realize in time crj-900 hadn't turned as quickly as I anticipated and he was descending faster than I anticipated. In all honesty I remember him being higher than he was when I glanced back up at him. Crj-900 was on the border of our antennas north of gpt 1780 highest obstruction where MVA is 3000 ft. His attitude when I saw was leaving 2900 ft. For 2800 ft. Almost out of the MVA circle. No recommendations for the airspace I understand I just miscalculated the situation.

Original NASA ASRS Text

Title: GPT TRACON Controller reported descending aircraft below the MVA.

Narrative: After turning and descending the CRJ-900 I was dealing with a VFR south east of GPT that had traffic coming at him and didn't realize in time CRJ-900 hadn't turned as quickly as I anticipated and he was descending faster than I anticipated. In all honesty I remember him being higher than he was when I glanced back up at him. CRJ-900 was on the border of our antennas north of GPT 1780 highest obstruction where MVA is 3000 ft. His attitude when I saw was leaving 2900 ft. for 2800 ft. almost out of the MVA circle. No recommendations for the airspace I understand I just miscalculated the situation.

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.