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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
899 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
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 26137.78705549 .00000121 00000-0 99997-4 0 9991
2 899 79.6890 160.2744 0118247 284.3883 74.4166 13.83044481100779Epoch: 2026-05-17T18:53Z
TLE epoch observation values (Epoch: 2026-05-17T18:53:21.594Z)
Latitude
-0.00005°
Longitude
1.44976°
Altitude
933.581 km
Speed
7.396 km/s
True Right ascension
10h 41m 05s
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
15:06:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,037.056 km
Perigee altitude
863.74 km
Semi-major axis
7,328.535 km
Eccentricity
0.01182
Inclination
79.689°
RAAN
160.2744°
Arg. of periapsis
284.3883°
True anomaly
75.72689°
Mean anomaly
74.4166°
Eccentric anomaly
75.07124°
Mean motion
3.45953 °/min
Orbital period
104.06 mins
BSTAR
0.000099997
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #64 in the year 1964 (1964-10-10 UTC)
Did you know?
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
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-05-18 12:50:06.640Z | 357.27° N | 2026-05-18 12:56:06.640Z | 94.239° ESE | 40.961° | 2026-05-18 13:01:06.640Z | 154.135° SSE |
| 7 mins | 2026-05-18 14:37:06.640Z | 308.801° NW | 2026-05-18 14:40:06.640Z | 277.022° WNW | 19.161° | 2026-05-18 14:44:06.640Z | 234.241° WSW |
| 11 mins | 2026-05-19 02:15:06.640Z | 186.948° SSW | 2026-05-19 02:20:06.640Z | 125.35° SE | 44.877° | 2026-05-19 02:26:06.640Z | 12.607° NNE |
| 5 mins | 2026-05-19 04:04:06.640Z | 275.371° WNW | 2026-05-19 04:06:06.640Z | 295.745° NW | 14.689° | 2026-05-19 04:09:06.640Z | 325.945° NNW |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|