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 spacecraft
Bus & Motor
NRL 14", Unknown motor
Mass
10 kg wet, 10 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 CALSPHERE 2
1 902U 64063E 25298.43219656 .00000053 00000-0 66914-4 0 9990
2 902 90.2327 70.2492 0018447 182.9889 248.1690 13.52876702824521Epoch: 2025-10-25T10:22Z
TLE epoch observation values (Epoch: 2025-10-25T10:22:21.782Z)
Latitude
71.02776°
Longitude
-120.07781°
Altitude
1,079.177 km
Speed
7.316 km/s
True Right ascension
04h 38m 18s
True Declination
70° 55' 35"
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
18:48:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,072.458 km
Perigee altitude
1,045.02 km
Semi-major axis
7,436.876 km
Eccentricity
0.00184
Inclination
90.2327°
RAAN
70.2492°
Arg. of periapsis
182.9889°
True anomaly
247.97294°
Mean anomaly
248.169°
Eccentric anomaly
248.07095°
Mean motion
3.38421 °/min
Orbital period
106.38 mins
BSTAR
0.000066914
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2025-10-26 07:30:11.734Z | 89.982° E | 2025-10-26 07:32:11.734Z | 71.69° E | 12.622° | 2025-10-26 07:35:11.734Z | 44.148° NE |
| 12 mins | 2025-10-26 09:12:11.734Z | 173.44° S | 2025-10-26 09:18:11.734Z | 15.9° NNE | 44.385° | 2025-10-26 09:24:11.734Z | 358.605° N |
| 4 mins | 2025-10-26 11:03:11.734Z | 268.568° W | 2025-10-26 11:05:11.734Z | 288.254° WNW | 13.656° | 2025-10-26 11:07:11.734Z | 307.115° NW |
| 9 mins | 2025-10-26 20:22:11.734Z | 30.233° NE | 2025-10-26 20:26:11.734Z | 82.603° E | 29.7° | 2025-10-26 20:31:11.734Z | 144.163° SSE |
| 10 mins | 2025-10-26 22:08:11.734Z | 337.587° N | 2025-10-26 22:12:11.734Z | 287.182° WNW | 30.42° | 2025-10-26 22:18:11.734Z | 218.752° SW |
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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