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: 8 hours ago
TLE from 8 hours ago
0 CALSPHERE 1
1 00900U 64063C 26128.28213748 .00000606 00000-0 60758-3 0 9993
2 00900 90.2226 70.8300 0028437 55.0281 110.6465 13.76577122 65932Epoch: 2026-05-08T06:46Z
TLE epoch observation values (Epoch: 2026-05-08T06:46:16.678Z)
Latitude
13.98835°
Longitude
-76.80049°
Altitude
985.742 km
Speed
7.356 km/s
True Right ascension
16h 43m 32s
True Declination
13° 54' 37"
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
22:57:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
993.968 km
Perigee altitude
952.159 km
Semi-major axis
7,351.201 km
Eccentricity
0.00284
Inclination
90.2226°
RAAN
70.83°
Arg. of periapsis
55.0281°
True anomaly
110.95105°
Mean anomaly
110.6465°
Eccentric anomaly
110.79881°
Mean motion
3.44354 °/min
Orbital period
104.54 mins
BSTAR
0.00060758
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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 | 2026-05-08 20:01:59.807Z | 154.706° SSE | 2026-05-08 20:06:59.807Z | 91.421° ESE | 38.149° | 2026-05-08 20:12:59.807Z | 7.945° NNE |
| 7 mins | 2026-05-08 21:48:59.807Z | 242.601° WSW | 2026-05-08 21:51:59.807Z | 279.163° WNW | 20.194° | 2026-05-08 21:55:59.807Z | 324.035° NNW |
| 5 mins | 2026-05-09 07:01:59.807Z | 58.77° ENE | 2026-05-09 07:03:59.807Z | 80.951° E | 15.327° | 2026-05-09 07:06:59.807Z | 111.573° ESE |
| 10 mins | 2026-05-09 08:43:59.807Z | 356.382° N | 2026-05-09 08:48:59.807Z | 256.712° W | 43.385° | 2026-05-09 08:53:59.807Z | 193.795° SSW |
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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