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CALSPHERE 4(A), 1520

Orbit data source: Space-Track

CALSPHERE 4(A), 1520 is a payload satellite owned by NRL (US) in LEO that was launched on Fri, 13 Aug 1965 UTC via a THOR ABLESTAR launch vehicle from the Air Force Western Test Range (AFWTR). Payloads include a variety of satellites, spacecraft, and rockets 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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CALSPHERE 4(A) details
Identifier
1520, 1965-065H
Orbit
LEO
Last TLE update3 hours ago
Origin
Flag of USNRL (US)
ManufacturerNRL
MissionOperational Defense Calibration
Bus & MotorNRL 14", Unknown motor
Mass4 kg wet, 4 kg dry
Launch date (UTC)
1965-08-13 (59 years ago)
Launch vehicle
THOR ABLESTAR
Launch site
Air Force Western Test Range (AFWTR)
Object type
Payload
Rocket body
Debris
Shape & HBRSphere, 0.4 m
Radar Cross Section0.126 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 3 hours ago
0 CALSPHERE 4(A)
1  1520U 65065H   24304.20721628  .00000298  00000-0  55681-3 0  9998
2  1520  89.9326 127.2950 0068895 343.8631  68.8531 13.36123046883668
Epoch: 2024-10-30T04:58Z
Definitive object data (Epoch: 2024-10-30T04:58:23.486Z)
Latitude53.54854°
Longitude13.7799°
Altitude1,114.257 km
Speed7.309 km/s
True Right ascension08h 29m 32s
True Declination53° 23' 31"
Sunlit
Object was in daylight at TLE epoch
Visualization TLE readout
Latitude20.84186°
Longitude13.71369°
Altitude1,085.153 km
Speed7.331 km/s
Apparent Right ascension11h 15m 50s
Apparent Declination-11° 52' 49"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time04:00:29
Azimuth87.228° E
Elevation-21.989°
Doppler factor1
Orbital elements
Apogee1,172.49 km
Perigee1,069.162 km
Semi-major axis7,498.963 km
Eccentricity0.0068895
Inclination89.9326°
RAAN127.295°
Arg. of periapsis343.8631°
True anomaly69.59169°
Mean anomaly68.8531°
Eccentric anomaly69.22217°
Mean motion3.34227 °/min
BSTAR0.00055681
Period107.71 mins
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CALSPHERE 4(A) 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 mins2024-10-30 12:00:22.463Z144.481° SSE2024-10-30 12:06:22.463Z71.912° E33.092°2024-10-30 12:11:22.463Z15.676° NNE
10 mins2024-10-30 13:49:22.463Z224.578° SW2024-10-30 13:53:22.463Z272.043° WNW27.705°2024-10-30 13:59:22.463Z337.277° NNW
9 mins2024-10-30 23:18:22.463Z38.415° NE2024-10-30 23:22:22.463Z77.451° E20.104°2024-10-30 23:27:22.463Z124.325° SE
12 mins2024-10-31 01:05:22.463Z353.138° N2024-10-31 01:10:22.463Z286.708° WNW42.286°2024-10-31 01:17:22.463Z196.91° SSW
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