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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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: 8 hours ago
TLE from 8 hours ago
0 GGSE 1 (GGRS)
1 728U 64001B 26069.20909946 .00000069 00000-0 87110-4 0 9996
2 728 69.9070 56.7354 0010833 121.7620 238.4542 13.97754537165847Epoch: 2026-03-10T05:01Z
TLE epoch observation values (Epoch: 2026-03-10T05:01:06.193Z)
Latitude
-0.00009°
Longitude
173.56858°
Altitude
908.022 km
Speed
7.396 km/s
True Right ascension
03h 46m 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
17:15:14
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
907.516 km
Perigee altitude
891.748 km
Semi-major axis
7,277.769 km
Eccentricity
0.00108
Inclination
69.907°
RAAN
56.7354°
Arg. of periapsis
121.762°
True anomaly
238.34848°
Mean anomaly
238.4542°
Eccentric anomaly
238.40133°
Mean motion
3.49579 °/min
Orbital period
102.98 mins
BSTAR
0.00008711
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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 | 2026-03-11 00:00:49.812Z | 182.716° SSW | 2026-03-11 00:06:49.812Z | 91.331° ESE | 37.648° | 2026-03-11 00:11:49.812Z | 35.068° NE |
| 8 mins | 2026-03-11 01:48:49.812Z | 263.668° W | 2026-03-11 01:51:49.812Z | 302.408° NW | 23.205° | 2026-03-11 01:56:49.812Z | 1.398° NNE |
| 8 mins | 2026-03-11 09:03:49.812Z | 5.044° NNE | 2026-03-11 09:06:49.812Z | 46.064° ENE | 27.052° | 2026-03-11 09:11:49.812Z | 113.184° SE |
| 9 mins | 2026-03-11 10:48:49.812Z | 314.149° NW | 2026-03-11 10:52:49.812Z | 254.512° W | 32.882° | 2026-03-11 10:57:49.812Z | 187.641° 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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