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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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: 16 hours ago
TLE from 16 hours ago
0 CALSPHERE 1
1 00900U 64063C 26095.69487546 .00000858 00000-0 86509-3 0 9991
2 00900 90.2193 70.0695 0026492 146.5689 268.1647 13.76536316 61455Epoch: 2026-04-05T16:40Z
TLE epoch observation values (Epoch: 2026-04-05T16:40:37.239Z)
Latitude
54.52489°
Longitude
-14.38841°
Altitude
985.957 km
Speed
7.363 km/s
True Right ascension
04h 39m 03s
True Declination
54° 22' 02"
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
14:13:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
992.684 km
Perigee altitude
953.734 km
Semi-major axis
7,351.346 km
Eccentricity
0.00265
Inclination
90.2193°
RAAN
70.0695°
Arg. of periapsis
146.5689°
True anomaly
267.86131°
Mean anomaly
268.1647°
Eccentric anomaly
268.013°
Mean motion
3.44344 °/min
Orbital period
104.55 mins
BSTAR
0.00086509
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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 | 2026-04-06 10:26:52.390Z | 6.808° NNE | 2026-04-06 10:31:52.390Z | 61.37° ENE | 43.671° | 2026-04-06 10:37:52.390Z | 176.983° S |
| 5 mins | 2026-04-06 12:13:52.390Z | 310.451° NW | 2026-04-06 12:15:52.390Z | 288.72° WNW | 14.743° | 2026-04-06 12:18:52.390Z | 257.842° W |
| 10 mins | 2026-04-06 22:11:52.390Z | 155.03° SSE | 2026-04-06 22:15:52.390Z | 87.557° E | 40.606° | 2026-04-06 22:21:52.390Z | 5.725° NNE |
| 7 mins | 2026-04-06 23:57:52.390Z | 246.333° WSW | 2026-04-07 00:00:52.390Z | 280.918° WNW | 18.692° | 2026-04-07 00:04:52.390Z | 323.196° 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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