GGSE 1 (GGRS), 728
Orbit data source: Space-Track
GGSE 1 (GGRS), 728 is an American payload satellite in LEO that was launched on Sat, 11 Jan 1964 UTC via a THOR SLV-2A AGENA D 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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Defense Technology
Bus & Motor
NRL 20", Unknown motor
Mass
38 kg wet, 38 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Sphere + 1 Ant, 4.5 m
Radar Cross Section
0.623 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 22 hours ago
TLE from 22 hours ago
0 GGSE 1 (GGRS)
1 00728U 64001B 25260.88341872 .00000069 00000-0 86843-4 0 9992
2 00728 69.9063 69.9854 0014935 328.0898 31.9302 13.97696312141622Epoch: 2025-09-17T21:12Z
TLE epoch observation values (Epoch: 2025-09-17T21:12:07.377Z)
Latitude
-0°
Longitude
114.90169°
Altitude
894.867 km
Speed
7.41 km/s
True Right ascension
04h 39m 56s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
12:26:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
910.704 km
Perigee altitude
888.965 km
Semi-major axis
7,277.971 km
Eccentricity
0.00149
Inclination
69.9063°
RAAN
69.9854°
Arg. of periapsis
328.0898°
True anomaly
32.02086°
Mean anomaly
31.9302°
Eccentric anomaly
31.97551°
Mean motion
3.49565 °/min
Orbital period
102.99 mins
BSTAR
0.000086843
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Other satellites on launch #1 in the year 1964 (1964-01-11 UTC)
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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.GGSE 1 (GGRS) 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2025-09-18 21:47:54.535Z | 346.993° N | 2025-09-18 21:52:54.535Z | 51.513° ENE | 37.164° | 2025-09-18 21:58:54.535Z | 135.152° SSE |
| 8 mins | 2025-09-18 23:34:54.535Z | 300.176° NW | 2025-09-18 23:37:54.535Z | 263.682° W | 22.442° | 2025-09-18 23:42:54.535Z | 206.014° SW |
| 5 mins | 2025-09-19 11:07:54.535Z | 123.696° SE | 2025-09-19 11:09:54.535Z | 101.673° ESE | 14.933° | 2025-09-19 11:12:54.535Z | 69.243° E |
| 9 mins | 2025-09-19 12:50:54.535Z | 213.735° SW | 2025-09-19 12:54:54.535Z | 295.896° NW | 43.777° | 2025-09-19 12:59:54.535Z | 19.817° NNE |
| 4 mins | 2025-09-19 14:39:54.535Z | 299.298° NW | 2025-09-19 14:41:54.535Z | 320.637° NNW | 12.796° | 2025-09-19 14:43:54.535Z | 340.972° N |
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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