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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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: 21 hours ago
TLE from 21 hours ago
0 CALSPHERE 1
1 900U 64063C 25312.77960910 .00001083 00000-0 10995-2 0 9998
2 900 90.2205 66.6665 0024755 236.0986 285.8819 13.76295237 41103Epoch: 2025-11-08T18:42Z
TLE epoch observation values (Epoch: 2025-11-08T18:42:38.226Z)
Latitude
18.28433°
Longitude
-82.12462°
Altitude
974.571 km
Speed
7.368 km/s
True Right ascension
16h 26m 57s
True Declination
18° 11' 07"
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
11:31:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
992.269 km
Perigee altitude
955.868 km
Semi-major axis
7,352.205 km
Eccentricity
0.00248
Inclination
90.2205°
RAAN
66.6665°
Arg. of periapsis
236.0986°
True anomaly
285.60883°
Mean anomaly
285.8819°
Eccentric anomaly
285.74539°
Mean motion
3.44284 °/min
Orbital period
104.56 mins
BSTAR
0.0010995
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-11-09 18:57:13.868Z | 30.199° NE | 2025-11-09 19:02:13.868Z | 87.205° E | 22.796° | 2025-11-09 19:06:13.868Z | 131.974° SE |
| 10 mins | 2025-11-09 20:42:13.868Z | 344.28° N | 2025-11-09 20:46:13.868Z | 287.494° WNW | 35.872° | 2025-11-09 20:52:13.868Z | 208.316° SW |
| 7 mins | 2025-11-10 06:43:13.868Z | 109.313° ESE | 2025-11-10 06:46:13.868Z | 76.199° E | 19.118° | 2025-11-10 06:50:13.868Z | 32.787° NE |
| 11 mins | 2025-11-10 08:25:13.868Z | 193.108° SSW | 2025-11-10 08:30:13.868Z | 266.146° W | 40.872° | 2025-11-10 08:36:13.868Z | 349.5° 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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