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: 11 hours ago
TLE from 11 hours ago
0 EXPLORER 22
1 899U 64064A 25322.43569584 .00000229 00000-0 19251-3 0 9998
2 899 79.6916 357.6247 0119886 28.5190 332.2449 13.82971054 75849Epoch: 2025-11-18T10:27Z
TLE epoch observation values (Epoch: 2025-11-18T10:27:24.120Z)
Latitude
-0.00006°
Longitude
143.05237°
Altitude
878.612 km
Speed
7.452 km/s
True Right ascension
23h 50m 29s
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
18:48:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,038.519 km
Perigee altitude
862.795 km
Semi-major axis
7,328.794 km
Eccentricity
0.01199
Inclination
79.6916°
RAAN
357.6247°
Arg. of periapsis
28.519°
True anomaly
331.59655°
Mean anomaly
332.2449°
Eccentric anomaly
331.92159°
Mean motion
3.45935 °/min
Orbital period
104.07 mins
BSTAR
0.00019251
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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 | 2025-11-19 02:12:14.877Z | 133.628° SE | 2025-11-19 02:16:14.877Z | 87.214° E | 19.34° | 2025-11-19 02:19:14.877Z | 50.401° ENE |
| 9 mins | 2025-11-19 03:57:14.877Z | 218.886° SW | 2025-11-19 04:01:14.877Z | 292.935° NW | 36.518° | 2025-11-19 04:06:14.877Z | 359.158° N |
| 8 mins | 2025-11-19 13:05:14.877Z | 23.113° NE | 2025-11-19 13:09:14.877Z | 76.41° E | 24.806° | 2025-11-19 13:13:14.877Z | 120.996° SE |
| 10 mins | 2025-11-19 14:50:14.877Z | 327.377° NNW | 2025-11-19 14:54:14.877Z | 265.635° W | 35.066° | 2025-11-19 15:00:14.877Z | 195.778° SSW |
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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