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: 6 hours ago
TLE from 6 hours ago
0 CALSPHERE 1
1 00900U 64063C 25299.30305163 .00000995 00000-0 10097-2 0 9998
2 00900 90.2190 66.3542 0023864 279.3641 112.2193 13.76268876 39255Epoch: 2025-10-26T07:16Z
TLE epoch observation values (Epoch: 2025-10-26T07:16:23.660Z)
Latitude
31.89137°
Longitude
-77.80113°
Altitude
987.991 km
Speed
7.357 km/s
True Right ascension
04h 24m 52s
True Declination
31° 44' 32"
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
08:59:28
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
991.708 km
Perigee altitude
956.617 km
Semi-major axis
7,352.299 km
Eccentricity
0.00239
Inclination
90.219°
RAAN
66.3542°
Arg. of periapsis
279.3641°
True anomaly
112.47217°
Mean anomaly
112.2193°
Eccentric anomaly
112.34576°
Mean motion
3.44277 °/min
Orbital period
104.57 mins
BSTAR
0.0010097
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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 | 2025-10-26 19:56:13.069Z | 29.913° NE | 2025-10-26 20:01:13.069Z | 90.542° ESE | 24.768° | 2025-10-26 20:05:13.069Z | 135.754° SSE |
| 9 mins | 2025-10-26 21:41:13.069Z | 340.902° N | 2025-10-26 21:45:13.069Z | 281.87° WNW | 34.151° | 2025-10-26 21:50:13.069Z | 214.643° SW |
| 7 mins | 2025-10-27 07:42:13.069Z | 109.584° ESE | 2025-10-27 07:45:13.069Z | 73.715° E | 20.649° | 2025-10-27 07:49:13.069Z | 29.968° NE |
| 11 mins | 2025-10-27 09:24:13.069Z | 197.376° SSW | 2025-10-27 09:29:13.069Z | 274.003° WNW | 39.068° | 2025-10-27 09:35:13.069Z | 348.288° 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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