OBJECT J, 63990
Orbit data source: Space-Track
OBJECT J, 63990 is a Chinese satellite in SSO that was launched on Wed, 14 May 2025 UTC via a CHANG ZHENG 2D launch vehicle from the Jiuquan Satellite Launch Center, China (JSC). 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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63990 intel report (Beta)
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Identifier
Orbit
Country
CN / PRCRelated business
None
Manufacturer
Unknown
Mission
Operational Commercial Technology
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
0.135 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 OBJECT J
1 63990U 25100J 26202.49211512 .00032088 00000-0 10233-2 0 9994
2 63990 97.3607 278.0128 0010439 157.8776 202.2919 15.32403273 66060Epoch: 2026-07-21T11:48Z
TLE epoch observation values (Epoch: 2026-07-21T11:48:38.746Z)
Latitude
0.00003°
Longitude
161.59032°
Altitude
478.369 km
Speed
7.623 km/s
True Right ascension
18h 32m 03s
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
18:21:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
472.736 km
Perigee altitude
458.448 km
Semi-major axis
6,843.729 km
Eccentricity
0.00104
Inclination
97.3607°
RAAN
278.0128°
Arg. of periapsis
157.8776°
True anomaly
202.24658°
Mean anomaly
202.2919°
Eccentric anomaly
202.26923°
Mean motion
3.83358 °/min
Orbital period
93.91 mins
BSTAR
0.0010233
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Other satellites on launch #100 in the year 2025 (2025-05-14 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 J 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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-07-22 18:08:37.169Z | 3.107° NNE | 2026-07-22 18:11:37.169Z | 272.149° WNW | 41.045° | 2026-07-22 18:14:37.169Z | 204.447° SW |
| 4 mins | 2026-07-23 04:42:37.169Z | 124.2° SE | 2026-07-23 04:44:37.169Z | 55.693° ENE | 30.03° | 2026-07-23 04:46:37.169Z | 11.608° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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