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TUBSAT, 25757

Orbit data source: Space-Track

TUBSAT, 25757 is a payload satellite owned by DLR (DE) in SSO that was launched on Wed, 26 May 1999 UTC via a PSLV launch vehicle from the Sirharikota (SRI). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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<iframe src="https://www.satcat.com/sats-embedded/25757?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/25757?theme=dark&initialShowStats=false

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Identifier

25757, 1999-029B

Orbit

SSO

Country

DE / GER

Related business

German Aerospace Center (DE)

Manufacturer

TUB

Mission

Operational Civil Imaging

Bus & Motor

TUBSAT, Unknown motor

Mass

45 kg wet, 45 kg dry

Launch date (UTC)

1999-05-26 (27 years ago)

Launch vehicle

PSLV

Launch site

Sirharikota (SRI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, 1.0 m

Radar Cross Section

0.135 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 TUBSAT
1 25757U 99029B   26092.72019476  .00000150  00000-0  48672-4 0  9997
2 25757  98.6683  85.7495 0013479 216.0129 144.0158 14.52406406422295

Epoch: 2026-04-02T17:17Z

TLE epoch observation values (Epoch: 2026-04-02T17:17:04.827Z)

Latitude

-0.00005°

Longitude

-4.58523°

Altitude

728.505 km

Speed

7.487 km/s

True Right ascension

05h 42m 59s

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

06:35:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

724.474 km

Perigee altitude

705.352 km

Semi-major axis

7,093.05 km

Eccentricity

0.00135

Inclination

98.6683°

RAAN

85.7495°

Arg. of periapsis

216.0129°

True anomaly

144.10643°

Mean anomaly

144.0158°

Eccentric anomaly

144.06113°

Mean motion

3.63324 °/min

Orbital period

99.09 mins

BSTAR

0.000048672

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Other satellites on launch #29 in the year 1999 (1999-05-26 UTC)

KITSAT 3, 25756

IRS P4 (OCEANSAT 1), 25758

PSLV R/B, 25759

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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.

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TUBSAT 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.
8 mins	2026-04-03 12:02:55.980Z	24.958° NE	2026-04-03 12:06:55.980Z	94.889° ESE	38.965°	2026-04-03 12:10:55.980Z	175.764° S
4 mins	2026-04-03 13:42:55.980Z	320.895° NNW	2026-04-03 13:44:55.980Z	291.751° WNW	15.913°	2026-04-03 13:46:55.980Z	264.809° W
7 mins	2026-04-03 23:10:55.980Z	148.454° SSE	2026-04-03 23:13:55.980Z	86.1° E	41.416°	2026-04-03 23:17:55.980Z	355.756° N

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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 TUBSAT, 25757 on other resources

View TUBSAT, 25757 on NASA - NSSDCA Website

View TUBSAT, 25757 on Heavens-Above

View TUBSAT, 25757 on Keep Track

View TUBSAT, 25757 on Celestrak

View TUBSAT, 25757 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

TUBSAT, 25757

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-04-02T17:17:04.827Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #29 in the year 1999 (1999-05-26 UTC)

TUBSAT Visibility forecast

Co-orbital & Co-planar RSOs

Check out TUBSAT, 25757 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago