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
Spacecraft
Bus & Motor
NRL 20", Unknown motor
Mass
38 kg wet, 38 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 12 hours ago
TLE from 12 hours ago
0 GGSE 1 (GGRS)
1 728U 64001B 26004.94630070 .00000119 00000-0 12205-3 0 9993
2 728 69.9059 195.1276 0014724 208.3484 151.6822 13.97735760156864Epoch: 2026-01-04T22:42Z
TLE epoch observation values (Epoch: 2026-01-04T22:42:40.380Z)
Latitude
-0.00005°
Longitude
109.90881°
Altitude
913.395 km
Speed
7.391 km/s
True Right ascension
13h 00m 30s
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
10:19:55
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
910.413 km
Perigee altitude
888.982 km
Semi-major axis
7,277.834 km
Eccentricity
0.00147
Inclination
69.9059°
RAAN
195.1276°
Arg. of periapsis
208.3484°
True anomaly
151.76211°
Mean anomaly
151.6822°
Eccentric anomaly
151.72217°
Mean motion
3.49575 °/min
Orbital period
102.98 mins
BSTAR
0.00012205
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-01-05 12:34:16.837Z | 138.902° SSE | 2026-01-05 12:38:16.837Z | 96.453° ESE | 16.638° | 2026-01-05 12:41:16.837Z | 64.433° ENE |
| 10 mins | 2026-01-05 14:18:16.837Z | 216.173° SW | 2026-01-05 14:23:16.837Z | 322.554° NNW | 42.288° | 2026-01-05 14:28:16.837Z | 18.852° NNE |
| 9 mins | 2026-01-05 23:20:16.837Z | 343.264° N | 2026-01-05 23:24:16.837Z | 64.861° ENE | 43.343° | 2026-01-05 23:29:16.837Z | 146.707° SSE |
| 5 mins | 2026-01-06 01:07:16.837Z | 281.306° WNW | 2026-01-06 01:09:16.837Z | 258.125° W | 15.542° | 2026-01-06 01:12:16.837Z | 226.393° WSW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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