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CALSPHERE 1, 900

Orbit data source: Space-Track

CALSPHERE 1, 900 is a payload satellite 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
18 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 18 hours ago
0 CALSPHERE 1
1 00900U 64063C   25138.75695194  .00000820  00000-0  83223-3 0  9994
2 00900  90.2168  62.7226 0028088  48.5059 343.3084 13.76046257 17171
Epoch: 2025-05-18T18:10Z
TLE epoch observation values (Epoch: 2025-05-18T18:10:00.647Z)
Latitude
31.77658°
Longitude
-86.59304°
Altitude
962.298 km
Speed
7.383 km/s
True Right ascension
04h 10m 21s
True Declination
31° 37' 38"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
31.03745°
Longitude
93.6875°
Altitude
986.471 km
Speed
7.359 km/s
Apparent Right ascension
13h 15m 12s
Apparent Declination
-2° 29' 59"
Sunlit
Object is in full shadow
Visualization observer readout
Local Sidereal Time
21:00:19
Azimuth
285.617° WNW
Elevation
-21.547°
Doppler factor
1
Orbital elements
Apogee altitude
995.609 km
Perigee altitude
954.302 km
Semi-major axis
7,353.093 km
Eccentricity
0.00281
Inclination
90.2168°
RAAN
62.7226°
Arg. of periapsis
48.5059°
True anomaly
Unknown
Mean anomaly
343.3084°
Eccentric anomaly
Unknown
Mean motion
3.44222 °/min
Orbital period
104.58 mins
BSTAR
0.00083223
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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.
11 mins2025-05-19 18:33:07.422Z147.376° SSE2025-05-19 18:38:07.422Z91.872° ESE33.027°2025-05-19 18:44:07.422Z12.459° NNE
9 mins2025-05-19 20:19:07.422Z226.668° WSW2025-05-19 20:23:07.422Z276.341° WNW24.622°2025-05-19 20:28:07.422Z333.279° NNW
10 mins2025-05-20 07:16:07.422Z2.188° NNE2025-05-20 07:20:07.422Z350.298° N44.849°2025-05-20 07:26:07.422Z184.936° SSW
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