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: 14 hours ago
TLE from 14 hours ago
0 GGSE 1 (GGRS)
1 00728U 64001B 25258.80804556 .00000032 00000-0 61009-4 0 9991
2 00728 69.9061 74.4550 0014829 330.5260 29.5008 13.97695821141335Epoch: 2025-09-15T19:23Z
TLE epoch observation values (Epoch: 2025-09-15T19:23:35.136Z)
Latitude
-0.00004°
Longitude
148.55119°
Altitude
894.7 km
Speed
7.41 km/s
True Right ascension
04h 57m 49s
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
02:26:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
910.629 km
Perigee altitude
889.044 km
Semi-major axis
7,277.973 km
Eccentricity
0.00148
Inclination
69.9061°
RAAN
74.455°
Arg. of periapsis
330.526°
True anomaly
29.58461°
Mean anomaly
29.5008°
Eccentric anomaly
29.54269°
Mean motion
3.49565 °/min
Orbital period
102.99 mins
BSTAR
0.000061009
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-09-16 12:40:24.637Z | 179.63° S | 2025-09-16 12:45:24.637Z | 118.024° SE | 36.458° | 2025-09-16 12:50:24.637Z | 39.088° NE |
| 8 mins | 2025-09-16 14:28:24.637Z | 263.948° W | 2025-09-16 14:31:24.637Z | 305.825° NW | 24.495° | 2025-09-16 14:36:24.637Z | 3.537° NNE |
| 8 mins | 2025-09-16 21:43:24.637Z | 7.482° NNE | 2025-09-16 21:46:24.637Z | 48.75° ENE | 26.311° | 2025-09-16 21:51:24.637Z | 111.846° ESE |
| 9 mins | 2025-09-16 23:28:24.637Z | 315.14° NNW | 2025-09-16 23:32:24.637Z | 251.833° W | 34.708° | 2025-09-16 23:37:24.637Z | 184.964° SSW |
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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