CALSPHERE 1, 900
Orbit data source: Space-Track
CALSPHERE 1, 900 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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900 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Operational spacecraft
Bus & Motor
NRL 14", Unknown motor
Mass
1 kg wet, 1 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 8 hours ago
TLE from 8 hours ago
0 CALSPHERE 1
1 900U 64063C 26177.68217566 .00000516 00000-0 51665-3 0 9990
2 900 90.2228 71.9944 0023247 265.8739 126.0297 13.76632944 72737Epoch: 2026-06-26T16:22Z
TLE epoch observation values (Epoch: 2026-06-26T16:22:19.977Z)
Latitude
32.17482°
Longitude
-88.53546°
Altitude
990.153 km
Speed
7.354 km/s
True Right ascension
04h 47m 25s
True Declination
32° 01' 30"
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
11:57:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
989.954 km
Perigee altitude
955.776 km
Semi-major axis
7,351.002 km
Eccentricity
0.00232
Inclination
90.2228°
RAAN
71.9944°
Arg. of periapsis
265.8739°
True anomaly
126.24477°
Mean anomaly
126.0297°
Eccentric anomaly
126.13727°
Mean motion
3.44368 °/min
Orbital period
104.54 mins
BSTAR
0.00051665
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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 1 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-06-27 05:00:49.780Z | 10.401° NNE | 2026-06-27 05:06:49.780Z | 103.066° ESE | 41.112° | 2026-06-27 05:11:49.780Z | 168.47° S |
| 6 mins | 2026-06-27 06:47:49.780Z | 316.405° NNW | 2026-06-27 06:50:49.780Z | 281.154° WNW | 18.4° | 2026-06-27 06:53:49.780Z | 249.355° W |
| 10 mins | 2026-06-27 16:45:49.780Z | 147.057° SSE | 2026-06-27 16:49:49.780Z | 90.659° ESE | 36.431° | 2026-06-27 16:55:49.780Z | 9.908° NNE |
| 7 mins | 2026-06-27 18:31:49.780Z | 240.358° WSW | 2026-06-27 18:34:49.780Z | 278.85° WNW | 22.645° | 2026-06-27 18:38:49.780Z | 325.166° 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 |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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