EXPLORER 22, 899
Orbit data source: Space-Track
EXPLORER 22, 899 is a payload satellite owned by GSFC (US) in LEO that was launched on Sat, 10 Oct 1964 UTC via an SCOUT X-4 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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899 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
APL
Mission
Spacecraft
Bus & Motor
TRANSIT 5, Unknown motor
Mass
52 kg wet, 52 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
OCT CYL + 4 PAN, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 EXPLORER 22
1 00899U 64064A 26317.77015954 .00000147 00000-0 12149-3 0 9995
2 00899 79.6894 323.3041 0119496 181.0634 179.0282 13.83089265125653Epoch: 2026-11-13T18:29Z
TLE epoch observation values (Epoch: 2026-11-13T18:29:01.784Z)
Latitude
-0.00002°
Longitude
-6.83787°
Altitude
1,043.367 km
Speed
7.286 km/s
True Right ascension
21h 33m 12s
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
02:06:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,037.811 km
Perigee altitude
862.668 km
Semi-major axis
7,328.376 km
Eccentricity
0.01195
Inclination
79.6894°
RAAN
323.3041°
Arg. of periapsis
181.0634°
True anomaly
179.05108°
Mean anomaly
179.0282°
Eccentric anomaly
179.03967°
Mean motion
3.45964 °/min
Orbital period
104.06 mins
BSTAR
0.00012149
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Other satellites on launch #64 in the year 1964 (1964-10-10 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.EXPLORER 22 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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-11-14 10:42:53.811Z | 35.479° NE | 2026-11-14 10:44:53.811Z | 57.05° ENE | 14.903° | 2026-11-14 10:47:53.811Z | 90.401° ESE |
| 10 mins | 2026-11-14 12:26:53.811Z | 343.584° N | 2026-11-14 12:30:53.811Z | 301.351° NW | 70.099° | 2026-11-14 12:36:53.811Z | 177.525° S |
| 8 mins | 2026-11-15 00:07:53.811Z | 129.559° SE | 2026-11-15 00:11:53.811Z | 83.919° E | 23.386° | 2026-11-15 00:15:53.811Z | 42.256° NE |
| 10 mins | 2026-11-15 01:51:53.811Z | 214.402° SW | 2026-11-15 01:56:53.811Z | 300.486° NW | 52.652° | 2026-11-15 02:01:53.811Z | 359.779° 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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