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
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 EXPLORER 22
1 899U 64064A 26120.20814455 .00000163 00000-0 13608-3 0 9997
2 899 79.6911 179.5092 0118517 329.8366 29.5994 13.83039554 98347Epoch: 2026-04-30T04:59Z
TLE epoch observation values (Epoch: 2026-04-30T04:59:43.689Z)
Latitude
-0.00003°
Longitude
-113.5809°
Altitude
880.627 km
Speed
7.45 km/s
True Right ascension
11h 58m 02s
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
18:56:46
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,037.271 km
Perigee altitude
863.559 km
Semi-major axis
7,328.552 km
Eccentricity
0.01185
Inclination
79.6911°
RAAN
179.5092°
Arg. of periapsis
329.8366°
True anomaly
30.27895°
Mean anomaly
29.5994°
Eccentric anomaly
29.93829°
Mean motion
3.45952 °/min
Orbital period
104.06 mins
BSTAR
0.00013608
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-04-30 14:15:34.083Z | 24.067° NE | 2026-04-30 14:19:34.083Z | 66.101° ENE | 19.356° | 2026-04-30 14:23:34.083Z | 106.811° ESE |
| 11 mins | 2026-04-30 16:00:34.083Z | 340.011° N | 2026-04-30 16:05:34.083Z | 249.393° W | 42.429° | 2026-04-30 16:11:34.083Z | 182.416° SSW |
| 7 mins | 2026-05-01 03:42:34.083Z | 125.224° SE | 2026-05-01 03:45:34.083Z | 84.051° E | 22.506° | 2026-05-01 03:49:34.083Z | 39.778° NE |
| 9 mins | 2026-05-01 05:26:34.083Z | 224.888° SW | 2026-05-01 05:30:34.083Z | 297.065° NW | 34.883° | 2026-05-01 05:35:34.083Z | 357.449° N |
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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