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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Edit Public Description
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: 20 hours ago
TLE from 20 hours ago
0 EXPLORER 22
1 899U 64064A 25306.44743492 .00000176 00000-0 14602-3 0 9999
2 899 79.6932 15.1167 0120263 69.5267 291.8745 13.82963438 73636Epoch: 2025-11-02T10:44Z
TLE epoch observation values (Epoch: 2025-11-02T10:44:18.377Z)
Latitude
-0.00007°
Longitude
172.07709°
Altitude
924.267 km
Speed
7.406 km/s
True Right ascension
01h 00m 28s
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
02:05:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,038.823 km
Perigee altitude
862.546 km
Semi-major axis
7,328.821 km
Eccentricity
0.01203
Inclination
79.6932°
RAAN
15.1167°
Arg. of periapsis
69.5267°
True anomaly
290.58852°
Mean anomaly
291.8745°
Eccentric anomaly
291.23222°
Mean motion
3.45933 °/min
Orbital period
104.07 mins
BSTAR
0.00014602
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-11-03 15:06:00.303Z | 25.757° NE | 2025-11-03 15:09:00.303Z | 60.777° ENE | 19.8° | 2025-11-03 15:13:00.303Z | 108.346° ESE |
| 9 mins | 2025-11-03 16:51:00.303Z | 333.624° NNW | 2025-11-03 16:55:00.303Z | 266.526° W | 38.915° | 2025-11-03 17:00:00.303Z | 191.119° SSW |
| 8 mins | 2025-11-04 04:32:00.303Z | 141.962° SSE | 2025-11-04 04:36:00.303Z | 87.389° E | 25.343° | 2025-11-04 04:40:00.303Z | 37.521° NE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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