CALSPHERE 2, 902
Orbit data source: Space-Track
CALSPHERE 2, 902 is a payload satellite owned by NRL (US) in LEO that was launched on Tue, 06 Oct 1964 UTC via a THOR ABLESTAR 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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Operational Defense Calibration
Bus & Motor
NRL 14", Unknown motor
Mass
10 kg wet, 10 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Sphere, 0.2 m
Radar Cross Section
0.102 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 22 hours ago
TLE from 22 hours ago
0 CALSPHERE 2
1 00902U 64063E 25259.98292295 .00000058 00000-0 74520-4 0 9994
2 00902 90.2267 69.3551 0016876 304.1079 177.4224 13.52871905819321Epoch: 2025-09-16T23:35Z
TLE epoch observation values (Epoch: 2025-09-16T23:35:24.542Z)
Latitude
58.55172°
Longitude
-100.29377°
Altitude
1,084.23 km
Speed
7.309 km/s
True Right ascension
16h 38m 53s
True Declination
58° 24' 19"
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
14:37:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,071.307 km
Perigee altitude
1,046.206 km
Semi-major axis
7,436.894 km
Eccentricity
0.00169
Inclination
90.2267°
RAAN
69.3551°
Arg. of periapsis
304.1079°
True anomaly
177.43108°
Mean anomaly
177.4224°
Eccentric anomaly
177.42674°
Mean motion
3.3842 °/min
Orbital period
106.38 mins
BSTAR
0.00007452
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Other satellites on launch #63 in the year 1964 (1964-10-06 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.CALSPHERE 2 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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-09-17 22:40:07.311Z | 26.425° NE | 2025-09-17 22:45:07.311Z | 79.4° E | 26.07° | 2025-09-17 22:50:07.311Z | 136.832° SSE |
| 10 mins | 2025-09-18 00:27:07.311Z | 342.847° N | 2025-09-18 00:32:07.311Z | 269.733° W | 34.541° | 2025-09-18 00:37:07.311Z | 213.636° SW |
| 9 mins | 2025-09-18 10:38:07.311Z | 121.772° SE | 2025-09-18 10:42:07.311Z | 71.585° E | 25.897° | 2025-09-18 10:47:07.311Z | 20.273° NNE |
| 10 mins | 2025-09-18 12:23:07.311Z | 208.488° SW | 2025-09-18 12:28:07.311Z | 281.5° WNW | 34.705° | 2025-09-18 12:33:07.311Z | 341.04° 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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