OBJECT D, 49398

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 D, 49398 is a Japanese satellite in SSO that was launched on Tue, 09 Nov 2021 UTC via an EPSILON launch vehicle from the Kagoshima Space Center University Of Tokyo (KSCUT). 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/49398?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/49398?theme=dark&initialShowStats=false

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Identifier

49398, 2021-102D

Orbit

SSO

Last TLE update

14 hours ago

Origin

National Satellite Center, Vietnam Academy of Science and Te (JP / JPN)

Manufacturer

VNSC/MEISEI

Mission

Non-operational Civil Com/Tech

Bus & Motor

CUBESAT 3U, Unknown motor

Mass

4 kg wet, 4 kg dry

Launch date (UTC)

2021-11-09 (4 years ago)

Launch vehicle

EPSILON

Launch site

Kagoshima Space Center University Of Tokyo (KSCUT)

Object type

Unknown

Shape & HBR

Box + 1 Ant, 3.5 m

Radar Cross Section

0.281 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 OBJECT D
1 49398U 21102D   25202.09651982  .00006354  00000-0  27798-3 0  9994
2 49398  97.3694 244.7963 0008925 299.2587  60.7757 15.22370606203519

Epoch: 2025-07-21T02:18Z

TLE epoch observation values (Epoch: 2025-07-21T02:18:59.312Z)

Latitude

0°

Longitude

-89.06066°

Altitude

498.794 km

Speed

7.617 km/s

True Right ascension

16h 19m 11s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow at epoch

Visualization orbit readout

Latitude

-28.32369°

Longitude

-84.51063°

Altitude

504.307 km

Speed

7.614 km/s

Apparent Right ascension

16h 57m 09s

Apparent Declination

-33° 51' 03"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

05:21:38

Azimuth

40.795° NE

Elevation

-82.209°

Doppler factor

Orbital elements

Apogee altitude

501.788 km

Perigee altitude

489.519 km

Semi-major axis

6,873.79 km

Eccentricity

0.00089

Inclination

97.3694°

RAAN

244.7963°

Arg. of periapsis

299.2587°

True anomaly

60.865°

Mean anomaly

60.7757°

Eccentric anomaly

60.82035°

Mean motion

3.80845 °/min

Orbital period

94.53 mins

BSTAR

0.00027798

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Other satellites on launch #102 in the year 2021 (2021-11-09 UTC)

ASTERISC, 49395 (Decayed)

TEIKYOSAT-4 (OORURI), 49396

EPSILON R/B, 49405 (Decayed)

DRUMS TARGET-1, 55685 (Decayed)

DRUMS TARGET-2, 58954 (Decayed)

OBJECT D Visibility forecast

Observer location: undefined°, undefined°

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.
5 mins	2025-07-22 02:07:22.016Z	117.929° SE	2025-07-22 02:10:22.016Z	60.417° ENE	19.502°	2025-07-22 02:12:22.016Z	24.18° NE
4 mins	2025-07-22 03:42:22.016Z	235.857° WSW	2025-07-22 03:43:22.016Z	258.919° W	20.684°	2025-07-22 03:46:22.016Z	316.384° NNW
4 mins	2025-07-22 15:11:22.016Z	54.351° ENE	2025-07-22 15:13:22.016Z	110.433° ESE	25.866°	2025-07-22 15:15:22.016Z	151.716° SSE

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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Authenticating...

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Check out OBJECT D, 49398 on other resources

View OBJECT D, 49398 on Heavens-Above

View OBJECT D, 49398 on Keep Track

View OBJECT D, 49398 on Celestrak

View OBJECT D, 49398 on Gunter's Space Page

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