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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: 5 hours ago

TLE from 5 hours ago

0 TUBSAT
1 25757U 99029B   26272.79929399  .00000023  00000-0  17589-4 0  9990
2 25757  98.6776 271.7891 0014849  36.1810 324.0386 14.52447593448434

Epoch: 2026-09-29T19:10Z

TLE epoch observation values (Epoch: 2026-09-29T19:10:59.000Z)

Latitude

-0.00004°

Longitude

-24.51585°

Altitude

712.101 km

Speed

7.504 km/s

True Right ascension

18h 07m 09s

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

18:11:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

725.312 km

Perigee altitude

704.247 km

Semi-major axis

7,092.916 km

Eccentricity

0.00148

Inclination

98.6776°

RAAN

271.7891°

Arg. of periapsis

36.181°

True anomaly

323.93853°

Mean anomaly

324.0386°

Eccentric anomaly

323.98858°

Mean motion

3.63334 °/min

Orbital period

99.08 mins

BSTAR

0.000017589

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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	2026-09-30 12:17:38.713Z	33.887° NE	2026-09-30 12:21:38.713Z	94.377° ESE	34.4°	2026-09-30 12:25:38.713Z	160.111° S
5 mins	2026-09-30 13:57:38.713Z	327.85° NNW	2026-09-30 13:59:38.713Z	292.298° WNW	25.145°	2026-09-30 14:02:38.713Z	246.342° WSW
7 mins	2026-09-30 23:25:38.713Z	131.99° SE	2026-09-30 23:28:38.713Z	81.421° E	38.627°	2026-09-30 23:32:38.713Z	6.323° NNE

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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: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-09-29T19:10:59.000Z)

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: 5 hours ago