South Korea's Fourth Nuri Launch Sends 13 Satellites Into Orbit as Industry Takes the Lead

Thirteen satellites and a new role for Korean industry

South Korea's fourth Nuri rocket flight placed a 516 kilogram science satellite and 12 cubesats into an orbit roughly 600 kilometers above Earth, marking the first mission in which a private company led the launcher's manufacturing and assembly. Hanwha Aerospace managed the build, bringing together more than 300 partner companies in a shift from government leadership toward industrial responsibility for the country's access to space.

Nuri lifted off at 1:13 a.m. local time from the Naro Space Center in Goheung, South Jeolla Province, after an 18 minute delay caused by a pressure sensor reading in an umbilical connection. Engineers held the countdown, checked the data and cleared the rocket to launch into the night sky.

The main spacecraft, Compact Advanced Satellite 3, or CAS500 3, established its first contact with the King Sejong Station in Antarctica at 1:55 a.m. Later communications through Daejeon and Svalbard indicated healthy operation, including power generation and the deployment of its solar panels.

The mission combined a rocket developed through the national space program with production and assembly led by industry. The government retained responsibility for final launch authorization and mission management. Hanwha's expanding role is intended to support regular launches, sustain suppliers and eventually help Korean companies compete for commercial satellite transport.

South Korea now faces the task of turning successful individual missions into a dependable service. The fifth and sixth Nuri flights are planned for 2026 and 2027, while officials are preparing a budget request for a seventh flight in 2028. Their longer term goal is at least one launch each year through 2032.

How the flight unfolded

Nuri followed its planned sequence after the countdown resumed. The first stage shut down and separated about two minutes after liftoff. The second stage separated around the five minute mark, and the vehicle passed an altitude of 500 kilometers near seven minutes.

The third stage shut down around 12 minutes into the flight, after guiding the payloads toward their intended orbital track. CAS500 3 separated cleanly, followed by the 12 cubesats, which were released at intervals of roughly 20 seconds into a similar orbit around 600 kilometers above Earth.

The flight sequence involved several tightly timed operations. Each stage supplied the propulsion needed for the next part of the climb, then separated as the remaining vehicle continued toward orbit. Releasing the satellites in sequence also tested Nuri's ability to carry and deploy different payloads on the same mission.

University and research teams reported that several cubesats made contact on schedule. Others were programmed to communicate later in the day, when their orbits brought them within reach of assigned ground stations. Confirmation of contact for every cubesat was still pending in the account available as of December 16, 2025.

Small satellites can have staggered communication windows because both their position and the location of a ground station must line up. Teams continued tracking expected passes and call times, with verification typically unfolding over days.

Hanwha takes responsibility for the build

The Korea Aerospace Research Institute designed Nuri and led its development. For the fourth flight, Hanwha Aerospace served as the system integrator, the company responsible for bringing the launcher's many components together into a complete vehicle. It managed full assembly and coordinated more than 300 partner companies across South Korea.

A comprehensive technology transfer agreement gives Hanwha the ability to manufacture and launch KSLV II, Nuri's formal name, through 2032. The arrangement includes design data, manufacturing processes and rights to build and operate the launcher, with continued close cooperation with the national program.

Hanwha assembled all six liquid engines used across Nuri's three stages: five engines in the 75 ton class and one in the 7 ton class. Each engine requires thousands of precision parts and hundreds of separate manufacturing steps. Reliable suppliers and rigorous quality checks are therefore central to producing a rocket ready for flight.

Hanwha plans to connect launch services, satellites and services using satellite data through cooperation with affiliates including Hanwha Systems and Satrec Initiative. The company aims to serve public missions while building a business capable of competing for commercial work.

Hanwha Aerospace's chief executive, Son Jae il, described independent access to space as a central reason for developing the business.

We cannot rely on foreign launch vehicles.

Hanwha will continue working with the national program team to absorb operational knowledge and prepare Nuri for repeated flights. Its shares rose after liftoff, reflecting investor confidence in the company's growing commercial role.

A Korean satellite and a locally built launchpad

Korea Aerospace Industries, or KAI, developed CAS500 3 using its own satellite platform and components selected to avoid export control restrictions. The spacecraft is the largest science payload yet flown by Nuri, combining research equipment with a demonstration of Korean satellite manufacturing capabilities.

CAS500 3 carries instruments to observe auroras, measure plasma and magnetic fields, and support life science experiments in orbit. Its biological work includes trials using three dimensional cell culture, allowing researchers to examine how cells behave under microgravity conditions.

HD Hyundai Heavy Industries designed, built and operates the Naro Space Center launchpad systems used for all Nuri flights. The infrastructure has been fully localized, including the strongback that supports the rocket, fueling equipment, umbilical connections and safe arm mechanisms.

Local control of the launchpad reduces dependence on foreign suppliers and gives teams greater control over preparing it for the next mission. More frequent flights require dependable ground equipment as well as dependable rockets, making the pad a practical part of the government's annual launch ambition.

What CAS500 3 will study

CAS500 3 is designed to study fine structures in Earth's upper atmosphere. Its wide field airglow camera will observe auroral and airglow activity linked to the Sun and Earth's magnetic field, while separate instruments measure plasma density and magnetic vectors.

Those measurements will help researchers map space weather dynamics. Space weather describes conditions shaped by solar activity and their effects around Earth. The mission's data may improve understanding of how those conditions affect communication and navigation services on the ground.

The satellite's biological equipment will examine how cells behave in microgravity. Research into three dimensional cell culture can inform medicine and future biomanufacturing in space, where living cells could be used in production processes.

Data from CAS500 3 will be shared across research institutions. The spacecraft therefore serves two connected purposes: providing a platform for scientific experiments and demonstrating that a domestically built satellite can carry substantial research equipment into orbit aboard a Korean launcher.

Twelve cubesats widen the mission

The dozen cubesats carry a broader collection of experiments from universities and laboratories. Some will test communication payloads, while others will study the atmosphere using GPS signals or evaluate infrared sensors capable of tracking ocean plastics.

Other cubesats will measure radiation or test new solar cell technologies. These small spacecraft give research teams access to orbit while allowing the launch program to practice integrating and releasing a mixture of payloads.

Nuri's fourth mission paired one larger science spacecraft with many smaller satellites. The arrangement gave universities and research groups a ride alongside a national science mission, rather than requiring each experiment to secure its own launch.

The work also extends beyond reaching orbit. Ground teams must establish communications, check spacecraft health and begin operating instruments. CAS500 3's early contacts supplied evidence of healthy operation, while the smaller spacecraft followed their own scheduled communication windows.

Government backs a shift toward commercial operations

South Korea's policy is moving toward commercial launch operations anchored by a national rocket. Private companies led the fourth mission's build and operations, while the state oversaw final launch authorization and mission management.

Policymakers expect the government to continue funding public missions, with commercial services added as reliability improves. A regular schedule is intended to support jobs, encourage supplier investment and reduce costs through repeated production and launch work.

President Lee Jae Myung described the mission as a step toward industry leadership and scientific independence.

This is the first time private companies participated in the entire process, and proving the independence of South Korea's science and technology will be the foundation for future generations.

Yoon Young bin, administrator of the Korea AeroSpace Administration, or KASA, set out the agency's goal for launch frequency and reliability.

We will conduct at least one launch per year until 2032 to raise the success rate to over 90%.

Bae Kyung hoon, minister of Science and ICT, connected the flight to plans beyond Nuri's current missions.

Building on today's success, we will pursue next generation launch vehicles, lunar exploration and deep space missions.

The government's role remains central to maintaining that schedule. Officials have said the state would fund a basic annual launch cadence if private demand is insufficient in the near term.

Nuri's progress across four flights

Nuri is South Korea's first fully indigenous orbital launcher. Its development took more than a decade under the Korea Aerospace Research Institute, with widespread participation by industry. The fourth flight builds on a progression from an unsuccessful orbital attempt to missions carrying working satellites.

• October 2021: Nuri's first flight reached space but failed to place a dummy payload into orbit.
• June 2022: The second flight placed six satellites into orbit, confirming the basic design.
• May 2023: The third mission successfully placed eight small satellites into orbit, including a radar test satellite and research cubesats.
• Fourth flight, covered as of December 16, 2025: Nuri carried CAS500 3 and 12 cubesats, with Hanwha Aerospace leading manufacturing and assembly for the first time.
• 2026 and 2027: The fifth and sixth flights are planned.
• 2028: A seventh flight is under consideration, with KASA preparing a budget request.

The three stage rocket weighs about 200 metric tons when fully fueled. Its first and second stages use five engines in the 75 ton class, while its third stage uses a 7 ton class engine. Nuri is built primarily with domestic technology.

That approach differs from South Korea's earlier Naro rocket, which used a foreign built first stage. Nuri supplies independent access to orbit, an asset that became valuable as international launch markets tightened and payloads originally booked on foreign rockets needed alternative rides.

The satellite count has increased across the three successful missions: six in June 2022, eight in May 2023 and 13 on the fourth flight. The latest mission also tested the country's new production structure alongside the established launcher design.

Suppliers seek a share of a growing market

Hundreds of Korean companies have supplied engines, avionics, structures and ground systems for the space program. Small and medium enterprises working in defense and aerospace are moving into satellite components and other space equipment.

Duksan Nepcores, a navigation specialist, supplied satellite navigation receivers for all four Nuri flights. It is also developing devices to counter jamming and smaller receivers for small satellites.

M and C Solution is working on actuators for solid and liquid propulsion systems. Actuators are mechanisms that turn control commands into physical movement. Xenoco is developing X band transmitters for satellite payloads, equipment used to send information by radio.

These suppliers see opportunities in constellations of satellites in low Earth orbit, which require frequent and reliable launches. Hanwha's plan to connect launch, satellite manufacturing and satellite services would place domestic suppliers within a wider space business.

One market study projects South Korea's launch services market growing from roughly $313 million in 2024 to more than $815 million by 2033. Those figures put the projected market at more than 2.6 times its 2024 size.

Another forecast expects an average of about 1,000 small satellites to enter orbit annually over the next decade, with the global small satellite launch market reaching tens of billions of dollars by the end of the decade. A domestic launcher could capture part of that demand while supporting Korean satellite builders and component manufacturers.

Why regular flights matter to factories and workers

The gap of two and a half years between Nuri's third and fourth flights created difficulties for some suppliers trying to retain specialized workers and keep production lines active. Industry leaders warn that an irregular schedule can weaken the supply chain needed for future missions.

KASA and the government are therefore pushing for at least one flight each year. A predictable schedule would give companies greater confidence to invest in tooling, maintain inventories and expand their workforce.

Stable budgets, clear schedules and a known manifest, the list of payloads assigned to future launches, are the main tools identified for keeping the program moving. Long pauses can cause skilled staff to leave and suppliers to redirect their effort to other work.

Shares of both Hanwha Aerospace and HD Hyundai Heavy rose after the launch. The investor response accompanied the operational achievement, while the industry's longer term needs remain tied to sustained orders and repeated missions.

Reliability and cost remain practical challenges

Nuri's success rate stands near 75 percent after four flights. Three successful missions out of four produce that figure, and KASA aims to raise reliability above 90 percent by the early 2030s.

Repeated flights will allow teams to learn from operations, diagnose anomalies quickly and refine production. The late pressure sensor issue on the fourth mission also showed why launch teams need time and procedures to investigate readings before authorizing liftoff.

Current estimates put the cost of a Nuri mission at around 120 billion won. Teams will seek savings through streamlined processes, greater reuse of ground hardware and gradual design refinements.

Nuri itself is expendable, unlike some foreign launchers designed for reuse. Its cost control will therefore depend on production efficiency and volume, alongside improvements in launch operations. The plan for annual flights connects the reliability goal with the need to make manufacturing and ground preparation more efficient.

Government funding for a basic annual schedule could help maintain operations while commercial demand develops. Keeping workers, suppliers and production facilities ready between missions is part of the effort to make the launcher dependable and economically sustainable.

The next missions and ambitions beyond Nuri

The fifth flight in 2026 and sixth in 2027 are the next planned steps. KASA is preparing a budget request for a seventh flight in 2028 and has outlined an ambition for at least one launch each year from then through 2032.

Hanwha Aerospace will continue leading assembly and operations, with KAI, HD Hyundai Heavy and hundreds of partner companies contributing across the rocket, satellites and ground systems. Repeated missions would allow those companies to refine processes and improve performance.

Engineers are also planning a next generation launcher that could carry heavier payloads and potentially reduce the cost per kilogram sent into orbit. That vehicle would support planned science missions, lunar exploration and deeper space objectives.

The government and industry are aligning a satellite roadmap covering Earth observation, communications and space science equipment built domestically. Regular access to orbit would give Korean universities and startups opportunities to test technologies in space, while established firms expand satellite services at home and abroad.

What to Know

• Nuri's fourth flight placed a 516 kilogram science satellite and 12 cubesats into an orbit roughly 600 kilometers above Earth.
• Liftoff occurred at 1:13 a.m. local time from Goheung after an 18 minute delay linked to an umbilical pressure sensor reading.
• CAS500 3 first contacted Antarctica's King Sejong Station at 1:55 a.m., with later links through Daejeon and Svalbard.
• Hanwha Aerospace led manufacturing and assembly for the first time under a technology transfer arrangement running through 2032.
• KAI built the main satellite, and HD Hyundai Heavy Industries built and operates the locally developed launchpad systems.
• More than 300 partner companies participated in the industrial effort.
• Flights are planned for 2026 and 2027, with a seventh under consideration for 2028 and an annual launch ambition through 2032.
• Nuri's current success rate is near 75 percent, against a target above 90 percent, with estimated costs around 120 billion won per mission.
• Stable funding and schedules are intended to protect skilled jobs, sustain suppliers and support future commercial launches.