C210 pilot reported an near midair collision with a glider.

Attributes
ACN	1755191
Time
Date	202008
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 210 Centurion / Turbo Centurion 210C 210D
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Sail Plane
Operating Under FAR Part	Part 91
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 45 Flight Crew Total 3857 Flight Crew Type 36
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 100 Vertical 0

Narrative:

Flying at 5000 feet MSL. I was being vectored between ZZZ and ZZZ1. I was about 10 miles west of ZZZ2 when out of the corner of my eye; approximately at my 2:00; I started to see a pair of wings that were very quickly growing in my windshield. Within a second; the only thing I could see was a glider out my windshield. I had to take an evasive maneuver by disengaging the autopilot; climbing and turning to the north. It did not appear that the glider had seen me. I told the controller what had happened and that an evasive maneuver had occurred. The controller was polite and professional. They mentioned they had a primary target a bit to my north; but that was another glider; which I had a visual on. Neither glider was showing on my traffic page on my GPS; but this is understandable if they do not have electrical systems; and thus no transponders. The controller gave me a vector further to the south; I assume to get me further and more quickly away from the glider port that is near ZZZ2. Made a practice approach into ZZZ1 with no further incidents.

Original NASA ASRS Text

Title: C210 pilot reported an NMAC with a glider.

Narrative: Flying at 5000 feet MSL. I was being vectored between ZZZ and ZZZ1. I was about 10 miles west of ZZZ2 when out of the corner of my eye; approximately at my 2:00; I started to see a pair of wings that were very quickly growing in my windshield. Within a second; the only thing I could see was a glider out my windshield. I had to take an evasive maneuver by disengaging the autopilot; climbing and turning to the north. It did not appear that the glider had seen me. I told the Controller what had happened and that an evasive maneuver had occurred. The Controller was polite and professional. They mentioned they had a primary target a bit to my north; but that was another glider; which I had a visual on. Neither glider was showing on my traffic page on my GPS; but this is understandable if they do not have electrical systems; and thus no transponders. The Controller gave me a vector further to the south; I assume to get me further and more quickly away from the glider port that is near ZZZ2. Made a practice approach into ZZZ1 with no further incidents.

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.