Sylle🇩🇰 
4K
A Tier
OY-CDC
cat (possibly Copenhagen Air Taxi, by livery/logo)
P68
RKE/EKRK
Partenavia P.68B Victor
Copenhagen Airport, Roskilde Denmark’s second-largest airport by movements, serving eastern Denmark and Greater Copenhagen. Traffic includes G/A, business aviation, VIP, air ambulance, private flying, and military operat…