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SUNSAT, 25636

Orbit data source: Space-Track

SUNSAT, 25636 is a payload satellite owned by Stellenbosch (ZA) in SSO that was launched on Tue, 23 Feb 1999 UTC via a DELTA 7920-10 launch vehicle from the Air Force Western Test Range (AFWTR). 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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https://www.satcat.com/sats-embedded/25636?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

25636, 1999-008C

Orbit

SSO

Country

ZA / SAFR

Related business

Stellenbosch University (ZA)

Manufacturer

Stellenbosch

Mission

Non-operational Amateur Com/Imaging

Bus & Motor

SUNSAT, Unknown motor

Mass

60 kg wet, 60 kg dry

Launch date (UTC)

1999-02-23 (27 years ago)

Launch vehicle

DELTA 7920-10

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, Unknown HBR

Radar Cross Section

0.425 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 SUNSAT
1 25636U 99008C   26154.63290705  .00000303  00000-0  82126-4 0  9997
2 25636  96.4716  34.5959 0142180  11.9894 348.4629 14.46465369437277

Epoch: 2026-06-03T15:11Z

TLE epoch observation values (Epoch: 2026-06-03T15:11:23.169Z)

Latitude

-0.00002°

Longitude

-85.33936°

Altitude

641.147 km

Speed

7.59 km/s

True Right ascension

02h 18m 23s

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

21:12:35

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

835.368 km

Perigee altitude

633.12 km

Semi-major axis

7,112.381 km

Eccentricity

0.01422

Inclination

96.4716°

RAAN

34.5959°

Arg. of periapsis

11.9894°

True anomaly

348.13127°

Mean anomaly

348.4629°

Eccentric anomaly

348.29767°

Mean motion

3.61843 °/min

Orbital period

99.49 mins

BSTAR

0.000082126

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Other satellites on launch #8 in the year 1999 (1999-02-23 UTC)

DELTA 2 R/B, 25637

DELTA 2 DEB, 39737 (Decayed)

DELTA 2 DEB, 39734 (Decayed)

DELTA 2 DEB, 39736 (Decayed)

DELTA 2 DEB, 39735 (Decayed)

ORSTED, 25635

DELTA 2 DEB, 39739 (Decayed)

ARGOS, 25634

DELTA 2 DEB, 39738 (Decayed)

DELTA 2 DEB, 39740 (Decayed)

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SUNSAT 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	2026-06-05 15:27:28.052Z	138.406° SSE	2026-06-05 15:31:28.052Z	70.479° E	30.76°	2026-06-05 15:35:28.052Z	6.795° NNE
4 mins	2026-06-05 17:08:28.052Z	240.362° WSW	2026-06-05 17:10:28.052Z	273.652° WNW	17.646°	2026-06-05 17:12:28.052Z	304.268° NW
5 mins	2026-06-06 03:34:28.052Z	66.862° ENE	2026-06-06 03:36:28.052Z	94.928° ESE	17.673°	2026-06-06 03:39:28.052Z	130.912° SE
8 mins	2026-06-06 05:11:28.052Z	354.872° N	2026-06-06 05:15:28.052Z	266.692° W	37.987°	2026-06-06 05:19:28.052Z	212.281° 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 SUNSAT, 25636 on other resources

View SUNSAT, 25636 on NASA - NSSDCA Website

View SUNSAT, 25636 on Heavens-Above

View SUNSAT, 25636 on Keep Track

View SUNSAT, 25636 on Celestrak

View SUNSAT, 25636 on Gunter's Space Page

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

SUNSAT, 25636

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-03T15:11:23.169Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #8 in the year 1999 (1999-02-23 UTC)

SUNSAT Visibility forecast

Co-orbital & Co-planar RSOs

Check out SUNSAT, 25636 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago