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: 10 hours ago
TLE from 10 hours ago
0 CALSPHERE 2
1 00902U 64063E 25258.21857160 .00000062 00000-0 79916-4 0 9996
2 00902 90.2265 69.3146 0016984 309.7153 223.9514 13.52871749819081Epoch: 2025-09-15T05:14Z
TLE epoch observation values (Epoch: 2025-09-15T05:14:44.586Z)
Latitude
6.39127°
Longitude
176.22769°
Altitude
1,073.177 km
Speed
7.311 km/s
True Right ascension
16h 37m 21s
True Declination
6° 21' 18"
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
07:36:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,071.388 km
Perigee altitude
1,046.126 km
Semi-major axis
7,436.894 km
Eccentricity
0.0017
Inclination
90.2265°
RAAN
69.3146°
Arg. of periapsis
309.7153°
True anomaly
223.81653°
Mean anomaly
223.9514°
Eccentric anomaly
223.88394°
Mean motion
3.3842 °/min
Orbital period
106.38 mins
BSTAR
0.000079916
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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 | 2025-09-15 22:44:57.488Z | 30.017° NE | 2025-09-15 22:49:57.488Z | 86.021° E | 24.896° | 2025-09-15 22:54:57.488Z | 137.711° SSE |
| 11 mins | 2025-09-16 00:30:57.488Z | 346.674° N | 2025-09-16 00:35:57.488Z | 283.688° WNW | 36.006° | 2025-09-16 00:41:57.488Z | 210.11° SW |
| 8 mins | 2025-09-16 10:42:57.488Z | 116.674° SE | 2025-09-16 10:45:57.488Z | 80.349° E | 24.685° | 2025-09-16 10:50:57.488Z | 24.391° NE |
| 11 mins | 2025-09-16 12:26:57.488Z | 203.597° SW | 2025-09-16 12:31:57.488Z | 267.002° W | 36.03° | 2025-09-16 12:37:57.488Z | 343.893° 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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