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TERRA, 25994

Orbit data source: Space-Track

TERRA, 25994 is a payload satellite owned by GSFC (US) in SSO that was launched on Sat, 18 Dec 1999 UTC via an ATLAS IIAS 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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<iframe src="https://www.satcat.com/sats-embedded/25994?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/25994?theme=dark&initialShowStats=false

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Identifier

25994, 1999-068A

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

LM/Valley Forge

Mission

Extended mission Civil Imaging

Bus & Motor

EOS, AOCS

Mass

5,190 kg wet, 4,854 kg dry

Launch date (UTC)

1999-12-18 (26 years ago)

Launch vehicle

ATLAS IIAS

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 12.0 m

Radar Cross Section

32.932 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 4 hours ago

TLE from 4 hours ago

0 TERRA
1 25994U 99068A   26164.88860163  .00000364  00000-0  83151-4 0  9995
2 25994  97.9457 214.5655 0001324 201.8095 331.1346 14.61100761409129

Epoch: 2026-06-13T21:19Z

TLE epoch observation values (Epoch: 2026-06-13T21:19:35.180Z)

Latitude

6.91981°

Longitude

173.43706°

Altitude

691.164 km

Speed

7.512 km/s

True Right ascension

02h 22m 07s

True Declination

6° 52' 42"

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

11:26:46

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

687.626 km

Perigee altitude

685.755 km

Semi-major axis

7,064.827 km

Eccentricity

0.00013

Inclination

97.9457°

RAAN

214.5655°

Arg. of periapsis

201.8095°

True anomaly

331.12727°

Mean anomaly

331.1346°

Eccentric anomaly

331.13094°

Mean motion

3.65503 °/min

Orbital period

98.49 mins

BSTAR

0.000083151

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Other satellites on launch #68 in the year 1999 (1999-12-18 UTC)

ATLAS 2A CENTAUR R/B, 25995 (Decayed)

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TERRA 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	2026-06-14 03:13:52.090Z	161.375° S	2026-06-14 03:17:52.090Z	62.055° ENE	44.512°	2026-06-14 03:21:52.090Z	350.324° N
5 mins	2026-06-14 15:13:52.090Z	63.195° ENE	2026-06-14 15:15:52.090Z	96.795° ESE	19.62°	2026-06-14 15:18:52.090Z	139.723° SSE
6 mins	2026-06-14 16:50:52.090Z	341.889° N	2026-06-14 16:52:52.090Z	302.332° NW	30.661°	2026-06-14 16:56:52.090Z	226.647° WSW

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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 TERRA, 25994 on other resources

View TERRA, 25994 on NASA - NSSDCA Website

View TERRA, 25994 on Heavens-Above

View TERRA, 25994 on Keep Track

View TERRA, 25994 on Celestrak

View TERRA, 25994 on Gunter's Space Page

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

TERRA, 25994

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 4 hours ago

TLE from 4 hours ago

TLE epoch observation values (Epoch: 2026-06-13T21:19:35.180Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #68 in the year 1999 (1999-12-18 UTC)

TERRA Visibility forecast

Co-orbital & Co-planar RSOs

Check out TERRA, 25994 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 4 hours ago