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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
900, 1964-063C
Orbit
LEO
Last TLE update
9 hours ago
Origin
Manufacturer
NRL
Mission
Operational Defense Calibration
Bus & Motor
NRL 14", Unknown motor
Mass
1 kg wet, 1 kg dry
Launch date (UTC)
1964-10-06 (61 years ago)
Launch vehicle
THOR ABLESTAR
Launch site
Air Force Western Test Range (AFWTR)
Object type
Payload
Rocket body
Debris
Shape & HBR
Sphere, 0.36 m
Radar Cross Section
0.102 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 9 hours ago
0 CALSPHERE 1
1 00900U 64063C   25191.62623264  .00000457  00000-0  45967-3 0  9997
2 00900  90.2147  63.9264 0023027 246.2573 174.3419 13.76109085 24440
Epoch: 2025-07-10T15:01Z
TLE epoch observation values (Epoch: 2025-07-10T15:01:46.5Z)
Latitude
60.71429°
Longitude
-90.688°
Altitude
1,005.026 km
Speed
7.346 km/s
True Right ascension
04h 14m 10s
True Declination
60° 34' 20"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
82.94864°
Longitude
91.42824°
Altitude
1,005.769 km
Speed
7.348 km/s
Apparent Right ascension
23h 31m 15s
Apparent Declination
35° 24' 01"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
12:12:06
Azimuth
8.57° NNE
Elevation
-14.098°
Doppler factor
1
Orbital elements
Apogee altitude
991.663 km
Perigee altitude
957.8 km
Semi-major axis
7,352.869 km
Eccentricity
0.0023
Inclination
90.2147°
RAAN
63.9264°
Arg. of periapsis
246.2573°
True anomaly
Unknown
Mean anomaly
174.3419°
Eccentric anomaly
Unknown
Mean motion
3.44237 °/min
Orbital period
104.58 mins
BSTAR
0.00045967
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CALSPHERE 1 Visibility forecast

Observer location: undefined°, undefined°

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.
12 mins2025-07-11 03:31:57.518Z9.917° NNE2025-07-11 03:37:57.518Z90.353° ESE41.144°2025-07-11 03:43:57.518Z169.877° S
7 mins2025-07-11 05:18:57.518Z319.437° NNW2025-07-11 05:21:57.518Z285.047° WNW18.576°2025-07-11 05:25:57.518Z243.952° WSW
10 mins2025-07-11 15:16:57.518Z149.353° SSE2025-07-11 15:21:57.518Z77.274° E36.593°2025-07-11 15:26:57.518Z11.794° NNE
8 mins2025-07-11 17:02:57.518Z234.991° WSW2025-07-11 17:06:57.518Z284.902° WNW22.61°2025-07-11 17:10:57.518Z328.128° NNW
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