Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 9.5
Situational Awareness; Distraction; Human-Machine Interface; Physiological - Other; Confusion
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
ATC Equipment / Nav Facility / Buildings; Human Factors
Had just relieved another controller. Aircraft X was descending via JFUND2 STAR and (I think) flashing to Approach Control. I signed in with my settings and went on to help an aircraft at a different airport up north with a practice approach and subsequent missed into another. This may have distracted me enough so that I didn't become aware that approach hadn't taken the hand off on Aircraft X. However; when I looked back down; Aircraft X was around 3NM into Approach airspace and I still had track control. I could've sworn Approach already had the hand off but when I looked back it wasn't even flashing to them anymore.I accept I may be in error. Fatigue was definitely a factor and it was the end of my week. That being said; when I called my Supervisor over; I noted to him that the auto-hand off function was still active on the data block. At a minimum; this means that even if I'd forgotten Aircraft X; the function should have activated and worked as designed to initiate a hand off to approach when I hadn't done it myself in a timely manner.I'm uncertain; but believe that when I signed in with my settings the hand off that the previous controller had already initiated for Aircraft X ceased. I am certain that the auto hand off function was not suppressed when I noticed Aircraft X was 3NM into approach airspace. Look into the auto-hand off function behavior.
ZBW Center Controller reported an airspace violation that may have been either human or equipment failure.