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 Defense Calibration
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, 0.2 m
Radar Cross Section
0.102 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 CALSPHERE 1
1 00900U 64063C 25260.93231028 .00000597 00000-0 60255-3 0 9993
2 00900 90.2139 65.4781 0026482 40.3304 82.1755 13.76190799 33974Epoch: 2025-09-17T22:22Z
TLE epoch observation values (Epoch: 2025-09-17T22:22:31.608Z)
Latitude
57.28657°
Longitude
-86.92348°
Altitude
984.532 km
Speed
7.366 km/s
True Right ascension
16h 23m 14s
True Declination
57° 08' 05"
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
01:28:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
993.911 km
Perigee altitude
954.969 km
Semi-major axis
7,352.577 km
Eccentricity
0.00265
Inclination
90.2139°
RAAN
65.4781°
Arg. of periapsis
40.3304°
True anomaly
82.47627°
Mean anomaly
82.1755°
Eccentric anomaly
82.32587°
Mean motion
3.44258 °/min
Orbital period
104.57 mins
BSTAR
0.00060255
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-09-18 10:08:40.356Z | 112.85° SE | 2025-09-18 10:11:40.356Z | 80.113° E | 18.976° | 2025-09-18 10:15:40.356Z | 34.213° NE |
| 10 mins | 2025-09-18 11:51:40.356Z | 197.012° SSW | 2025-09-18 11:55:40.356Z | 254.343° W | 39.514° | 2025-09-18 12:01:40.356Z | 348.132° N |
| 10 mins | 2025-09-18 22:48:40.356Z | 20.028° NNE | 2025-09-18 22:53:40.356Z | 95.584° ESE | 35.215° | 2025-09-18 22:58:40.356Z | 157.365° SSE |
| 8 mins | 2025-09-19 00:33:40.356Z | 330.499° NNW | 2025-09-19 00:37:40.356Z | 281.396° WNW | 23.753° | 2025-09-19 00:41:40.356Z | 235.457° WSW |
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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