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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Edit Public Description
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
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 CALSPHERE 1
1 00900U 64063C 25343.29487051 .00001129 00000-0 11442-2 0 9998
2 00900 90.2213 67.3780 0027424 145.8433 280.5505 13.76361616 45303Epoch: 2025-12-09T07:04Z
TLE epoch observation values (Epoch: 2025-12-09T07:04:36.812Z)
Latitude
66.16417°
Longitude
-117.5553°
Altitude
984.709 km
Speed
7.367 km/s
True Right ascension
04h 27m 31s
True Declination
66° 02' 27"
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
12:17:31
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
993.994 km
Perigee altitude
953.67 km
Semi-major axis
7,351.969 km
Eccentricity
0.00274
Inclination
90.2213°
RAAN
67.378°
Arg. of periapsis
145.8433°
True anomaly
280.24136°
Mean anomaly
280.5505°
Eccentric anomaly
280.39595°
Mean motion
3.44301 °/min
Orbital period
104.56 mins
BSTAR
0.0011442
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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 | 2025-12-09 17:48:43.593Z | 10.948° NNE | 2025-12-09 17:53:43.593Z | 67.998° E | 40.455° | 2025-12-09 17:59:43.593Z | 168.928° S |
| 6 mins | 2025-12-09 19:35:43.593Z | 314.54° NW | 2025-12-09 19:37:43.593Z | 291.149° WNW | 18.009° | 2025-12-09 19:41:43.593Z | 247.337° WSW |
| 10 mins | 2025-12-10 05:33:43.593Z | 147.578° SSE | 2025-12-10 05:37:43.593Z | 93.472° ESE | 36.238° | 2025-12-10 05:43:43.593Z | 10.133° NNE |
| 7 mins | 2025-12-10 07:19:43.593Z | 239.233° WSW | 2025-12-10 07:22:43.593Z | 277.127° WNW | 22.483° | 2025-12-10 07:26:43.593Z | 324.354° 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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