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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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
SPHERE, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 16 hours ago
TLE from 16 hours ago
0 CALSPHERE 1
1 00900U 64063C 26264.99365185 .00000428 00000-0 42569-3 0 9997
2 00900 90.2180 74.0106 0025890 3.7533 121.5849 13.76709843 84745Epoch: 2026-09-21T23:50Z
TLE epoch observation values (Epoch: 2026-09-21T23:50:51.519Z)
Latitude
54.50414°
Longitude
-104.26548°
Altitude
994.668 km
Speed
7.354 km/s
True Right ascension
16h 57m 15s
True Declination
54° 20' 48"
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
09:03:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
991.622 km
Perigee altitude
953.56 km
Semi-major axis
7,350.728 km
Eccentricity
0.00259
Inclination
90.218°
RAAN
74.0106°
Arg. of periapsis
3.7533°
True anomaly
121.8372°
Mean anomaly
121.5849°
Eccentric anomaly
121.71109°
Mean motion
3.44388 °/min
Orbital period
104.53 mins
BSTAR
0.00042569
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-09-22 22:31:32.427Z | 36.403° NE | 2026-09-22 22:35:32.427Z | 81.689° E | 22.969° | 2026-09-22 22:39:32.427Z | 126.619° SE |
| 10 mins | 2026-09-23 00:15:32.427Z | 348.097° N | 2026-09-23 00:20:32.427Z | 266.742° W | 51.368° | 2026-09-23 00:25:32.427Z | 206.065° SW |
| 6 mins | 2026-09-23 10:17:32.427Z | 100.451° ESE | 2026-09-23 10:20:32.427Z | 66.322° ENE | 17.564° | 2026-09-23 10:23:32.427Z | 35.516° NE |
| 10 mins | 2026-09-23 11:59:32.427Z | 191.141° SSW | 2026-09-23 12:03:32.427Z | 254.603° W | 65.24° | 2026-09-23 12:09:32.427Z | 351.2° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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