The 200-ton rocket lifted off from the Naro Space Center in Goheung, about 400 kilometers (248 miles) southwest of Seoul, at 12:25 p.m. local time, Yonhap News Agency reported.
The payload consisted of five New-space Earth Observation Satellite Constellation for National Safety (NEONSAT) microsatellites and 10 CubeSats.
The five NEONSAT satellites, numbered 2 through 6, were scheduled for deployment at intervals of 35 to 40 seconds at an altitude of about 575 kilometers (357 miles), followed by the CubeSats.
Each NEONSAT weighs less than 100 kilograms (220 pounds) and is equipped with an electro-optical camera capable of identifying objects as small as 1 meter (3.3 feet) in black-and-white imagery.
The satellites are designed to monitor the Korean Peninsula and surrounding areas for national security and disaster-response purposes.
Another five NEONSAT satellites are scheduled to be launched on Nuri’s sixth flight next year, completing the 10-satellite constellation.
Meanwhile, Nuri successfully placed 13 satellites into orbit during its fourth flight in November 2025, including the CAS500-3 and 12 CubeSats.
That mission marked Nuri’s first nighttime launch and the first flight led by private company Hanwha Aerospace.