OBJECT D, 66653
Orbit data source: Space-Track
OBJECT D, 66653 is a South Korean satellite in SSO that was launched on Wed, 26 Nov 2025 UTC via an NURI launch vehicle from the Naro Space Center, South Korea (NSC). Unknown objects in Earth's orbit typically refer to objects detected orbiting the Earth but have not yet been identified or cataloged. These objects could be anything from previously untracked satellites, spent rocket stages, debris from satellite collisions, or even natural meteoroids temporarily captured by Earth's gravity.
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66653 intel report (Beta)
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Identifier
Orbit
Country
KR / SKORRelated business
None
Manufacturer
Unknown
Mission
Operational Commercial Imaging
Bus & Motor
Unknown
Mass
Unknown
Launch date (UTC)
Launch vehicle
Launch site
Object type
Unknown
Shape & HBR
Box + 2 Pan, 1.1 m
Radar Cross Section
0.077 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 OBJECT D
1 66653U 25274D 26151.78742606 .00001783 00000-0 17796-3 0 9993
2 66653 97.7486 81.1347 0013884 54.3029 305.9480 14.92707314 27769Epoch: 2026-05-31T18:53Z
TLE epoch observation values (Epoch: 2026-05-31T18:53:53.611Z)
Latitude
-0.00005°
Longitude
-91.62276°
Altitude
586.87 km
Speed
7.57 km/s
True Right ascension
05h 24m 32s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
03:18:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
596.185 km
Perigee altitude
576.846 km
Semi-major axis
6,964.652 km
Eccentricity
0.00139
Inclination
97.7486°
RAAN
81.1347°
Arg. of periapsis
54.3029°
True anomaly
305.81907°
Mean anomaly
305.948°
Eccentric anomaly
305.88355°
Mean motion
3.73417 °/min
Orbital period
96.41 mins
BSTAR
0.00017796
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Other satellites on launch #274 in the year 2025 (2025-11-26 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.OBJECT D Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-01 19:09:11.079Z | 157.832° S | 2026-06-01 19:13:11.079Z | 28.405° NE | 41.418° | 2026-06-01 19:16:11.079Z | 353.451° N |
| 7 mins | 2026-06-02 08:28:11.079Z | 359.369° N | 2026-06-02 08:31:11.079Z | 284.27° WNW | 39.592° | 2026-06-02 08:35:11.079Z | 208.082° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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