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
Civil Science
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 + 2 Rod, 2.0 m
Radar Cross Section
1.165 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 EXPLORER 22
1 00899U 64064A 25260.94118568 .00000201 00000-0 16836-3 0 9993
2 00899 79.6880 64.9020 0119999 186.0136 173.9583 13.82932686 67344Epoch: 2025-09-17T22:35Z
TLE epoch observation values (Epoch: 2025-09-17T22:35:18.442Z)
Latitude
-0.00001°
Longitude
88.96524°
Altitude
1,043.83 km
Speed
7.286 km/s
True Right ascension
04h 19m 36s
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
14:10:25
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,038.74 km
Perigee altitude
862.847 km
Semi-major axis
7,328.93 km
Eccentricity
0.012
Inclination
79.688°
RAAN
64.902°
Arg. of periapsis
186.0136°
True anomaly
174.1009°
Mean anomaly
173.9583°
Eccentric anomaly
174.02981°
Mean motion
3.45925 °/min
Orbital period
104.07 mins
BSTAR
0.00016836
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-09-18 21:44:43.429Z | 11.951° NNE | 2025-09-18 21:49:43.429Z | 75.961° E | 25.953° | 2025-09-18 21:53:43.429Z | 125.366° SE |
| 9 mins | 2025-09-18 23:30:43.429Z | 324.71° NNW | 2025-09-18 23:34:43.429Z | 266.99° W | 30.299° | 2025-09-18 23:39:43.429Z | 203.645° SW |
| 11 mins | 2025-09-19 11:09:43.429Z | 160.893° S | 2025-09-19 11:14:43.429Z | 97.511° ESE | 35.424° | 2025-09-19 11:20:43.429Z | 24.661° NE |
| 9 mins | 2025-09-19 12:56:43.429Z | 245.606° WSW | 2025-09-19 13:00:43.429Z | 297.345° NW | 25.509° | 2025-09-19 13:05:43.429Z | 349.445° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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