OBJECT E, 63523

Orbit data source: Space-Track

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Recently launched and/or uncataloged satellites may have evolving metadata. Metadata may include but not limited to: Owner, Maufacturer, Bus, Motor, and Mission.

OBJECT E, 63523 is a satellite owned by Tsinghua (CN) in LEO that was launched on Thu, 29 Apr 2021 UTC via a CHANG ZHENG 7 launch vehicle from the Wenchang Satellite Launch Center (WSC). 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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https://www.satcat.com/sats-embedded/63523?theme=dark&initialShowStats=false

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Identifier

63523, 2021-035E

Orbit

LEO

Country

CN / PRC

Related business

Tsinghua University (CN)

Manufacturer

Tsinghua

Mission

Amateur Imaging

Bus & Motor

NAXING, Unknown motor

Mass

20 kg wet, 20 kg dry

Launch date (UTC)

2021-04-29 (5 years ago)

Launch vehicle

CHANG ZHENG 7

Launch site

Wenchang Satellite Launch Center (WSC)

Object type

Unknown

Shape & HBR

Box, 0.4 m

Radar Cross Section

0.240 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 OBJECT E
1 63523U 21035E   26083.48757537  .00078267  00000-0  63858-3 0  9998
2 63523  41.4556  88.5813 0005197  70.3482 289.7920 15.69586128 55070

Epoch: 2026-03-24T11:42Z

TLE epoch observation values (Epoch: 2026-03-24T11:42:06.511Z)

Latitude

-0.00006°

Longitude

91.08959°

Altitude

358.494 km

Speed

7.697 km/s

True Right ascension

05h 54m 19s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

03:08:25

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

365.828 km

Perigee altitude

358.822 km

Semi-major axis

6,740.462 km

Eccentricity

0.00052

Inclination

41.4556°

RAAN

88.5813°

Arg. of periapsis

70.3482°

True anomaly

289.73595°

Mean anomaly

289.792°

Eccentric anomaly

289.76398°

Mean motion

3.92201 °/min

Orbital period

91.79 mins

BSTAR

0.00063858

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Other satellites on launch #35 in the year 2021 (2021-04-29 UTC)

CSS (TIANHE-1), 48274

XW-4 (CAS-10), 54816 (Decayed)

CZ-5B R/B, 48275 (Decayed)

OBJECT D, 62300 (Decayed)

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OBJECT E 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.
4 mins	2026-03-25 04:46:21.207Z	243.712° WSW	2026-03-25 04:48:21.207Z	116.597° SE	41.753°	2026-03-25 04:50:21.207Z	80.383° E
4 mins	2026-03-25 07:59:21.207Z	275.525° WNW	2026-03-25 08:00:21.207Z	251.787° W	40.705°	2026-03-25 08:03:21.207Z	113.027° SE

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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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Check out OBJECT E, 63523 on other resources

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View OBJECT E, 63523 on Gunter's Space Page

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OBJECT E, 63523

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-03-24T11:42:06.511Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #35 in the year 2021 (2021-04-29 UTC)

OBJECT E Visibility forecast

Co-orbital & Co-planar RSOs

Check out OBJECT E, 63523 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 10 hours ago