Large Transport; Low Wing; 2 Turbojet Eng
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 13
Human-Machine Interface; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Exited Penetrated Airspace
Procedure; ATC Equipment / Nav Facility / Buildings; Airspace Structure; Human Factors
R2501 was released at 16000 feet and above. At XB:00 it was going 'HOT' released to ZLA 29000 feet and above. At approximately XA:50; I issued Aircraft X to descend now to 28000 feet then descend at pilots discretion to 24000 feet. At XB:00 R2501 went hot and alerted on my scope. As I saw this; Aircraft X was about 2 miles from the airspace and at 28300 feet. I immediately told Aircraft X to climb to 29000 feet immediately for active military airspace. Forty seconds later; Aircraft X entered R2501 at 28600 feet climbing to 29000 feet. I was aware of the change and just forgot at the time when I gave the clearance. A Controller in Charge was in charge and did not warn the area of the change as we normally do. Have the airspace come onto the scope 2 minutes prior to remind people sooner rather than it just coming onto the scope at the exact time.
ZLA Controller reported forgetting that a local restricted area was about to become active and descended an aircraft into the airspace.