SNUGLITE-II

SNUGLITE-II is an active satellite operated by Seoul National University (South Korea), launched on 2022-06-21 from Naro Space Center, South Korea. It orbits in Low Earth Orbit (LEO) at altitudes between 674 km and 685 km with an inclination of 98.2°. It travels at approximately 27,068 km/h (7.52 km/s), completing one full orbit every 98 minutes — that’s roughly 14.64 orbits per day. Its near-polar, sun-synchronous orbit means it passes over any given point on Earth at approximately the same local solar time, ideal for consistent Earth observation lighting conditions. Its near-circular orbit (eccentricity close to zero) means it maintains a very consistent altitude throughout each revolution. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. Orbital Radar tracks SNUGLITE-II in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

SNUGLITE-II orbits at an average altitude of 680 km in a sun-synchronous orbit (SSO), a specialised subset of LEO where the orbital plane precesses to maintain a constant angle relative to the Sun. This provides consistent lighting conditions on every pass — essential for Earth observation, weather monitoring and environmental science. Within ±50 km of SNUGLITE-II’s average altitude, there are currently 330 active payloads and 1,268 tracked debris or rocket body fragments — notable neighbours include TERRA, AQUA, LANDSAT 9. With an inclination of 98.2°, SNUGLITE-II passes over latitudes between 98.2°N and 98.2°S, providing near-global coverage including the polar regions. Polar and near-polar orbits are used for reconnaissance, weather monitoring and Earth-observation missions that need to image every part of the planet. South Korea operates approximately 51 active satellites in total, of which 12 share a similar altitude band with SNUGLITE-II.