OBJECT B, 49316

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 B, 49316 is a Chinese satellite in SSO that was launched on Thu, 14 Oct 2021 UTC via a CHANG ZHENG 2D launch vehicle from the Taiyaun Space Center, China (TSC). 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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<iframe src="https://www.satcat.com/sats-embedded/49316?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/49316?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

49316, 2021-091B

Orbit

SSO

Country

CN / PRC

Related business

Nanjing University (CN)

Manufacturer

SAST

Mission

Operational Amateur Astronomy

Bus & Motor

CHASE, Unknown motor

Mass

500 kg wet, 500 kg dry

Launch date (UTC)

2021-10-14 (5 years ago)

Launch vehicle

CHANG ZHENG 2D

Launch site

Taiyaun Space Center, China (TSC)

Object type

Unknown

Shape & HBR

Box + 2 Pan, 2.5 m

Radar Cross Section

3.585 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 22 hours ago

TLE from 22 hours ago

0 OBJECT B
1 49316U 21091B   26172.54079062  .00001977  00000-0  98738-4 0  9990
2 49316  97.4477   0.0491 0014224  31.7391 328.4697 15.18569924259649

Epoch: 2026-06-21T12:58Z

TLE epoch observation values (Epoch: 2026-06-21T12:58:44.309Z)

Latitude

-0.00011°

Longitude

-104.3751°

Altitude

504.9 km

Speed

7.616 km/s

True Right ascension

00h 00m 11s

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

21:51:24

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

516.925 km

Perigee altitude

497.338 km

Semi-major axis

6,885.268 km

Eccentricity

0.00142

Inclination

97.4477°

RAAN

0.0491°

Arg. of periapsis

31.7391°

True anomaly

328.38433°

Mean anomaly

328.4697°

Eccentric anomaly

328.42703°

Mean motion

3.79894 °/min

Orbital period

94.76 mins

BSTAR

0.000098738

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Other satellites on launch #91 in the year 2021 (2021-10-14 UTC)

OBJECT A, 49315 (Decayed)

OBJECT F, 49320 (Decayed)

OBJECT J, 49323 (Decayed)

OBJECT G, 49321

OBJECT E, 49319

OBJECT L, 49325 (Decayed)

OBJECT H, 49322 (Decayed)

OBJECT D, 49318

OBJECT C, 49317 (Decayed)

OBJECT K, 49324 (Decayed)

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OBJECT B 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	2026-06-22 12:49:20.006Z	183.405° SSW	2026-06-22 12:52:20.006Z	251.954° W	38.813°	2026-06-22 12:55:20.006Z	335.485° NNW
5 mins	2026-06-23 01:55:20.006Z	341.988° N	2026-06-23 01:57:20.006Z	291.649° WNW	29.651°	2026-06-23 02:00:20.006Z	224.99° SW

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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 B, 49316 on other resources

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View OBJECT B, 49316 on Keep Track

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View OBJECT B, 49316 on Gunter's Space Page

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OBJECT B, 49316

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 22 hours ago

TLE from 22 hours ago

TLE epoch observation values (Epoch: 2026-06-21T12:58:44.309Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #91 in the year 2021 (2021-10-14 UTC)

OBJECT B Visibility forecast

Co-orbital & Co-planar RSOs

Check out OBJECT B, 49316 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 22 hours ago