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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1520 intel report (Beta)
CALSPHERE 4(A) details
| Identifier | |
| Orbit | LEO |
| Last TLE update | 8 hours ago |
| Origin | |
| Manufacturer | NRL |
| Mission | Operational Defense Calibration |
| Bus & Motor | NRL 14", Unknown motor |
| Mass | 4 kg wet, 4 kg dry |
| Launch date (UTC) | |
| Launch vehicle | |
| Launch site | |
| Object type | Payload Rocket body Debris |
| Shape & HBR | Sphere, 0.4 m |
| Radar Cross Section | 0.126 m², Small (<0.1 m²) |
Expand to show TLE details & history
TLE from 8 hours ago
0 CALSPHERE 4(A)
1 01520U 65065H 25015.58058087 .00000138 00000-0 24620-3 0 9993
2 01520 89.9352 126.8018 0071029 123.9274 4.6652 13.36156638893587Epoch: 2025-01-15T13:56Z
Definitive object data (Epoch: 2025-01-15T13:56:02.187Z)
| Latitude | 51.43486° |
| Longitude | -17.55905° |
| Altitude | 1,078.864 km |
| Speed | 7.343 km/s |
| True Right ascension | 20h 26m 53s |
| True Declination | 51° 16' 28" |
| Sunlit | Object was in daylight at TLE epoch |
Visualization TLE readout
| Latitude | -54.86177° |
| Longitude | 162.42806° |
| Altitude | 1,198.234 km |
| Speed | 7.228 km/s |
| Apparent Right ascension | 09h 38m 32s |
| Apparent Declination | -49° 07' 06" |
| Sunlit | Object is in daylight |
Visualization observer readout
| Local Sidereal Time | 22:42:16 |
| Azimuth | 134.418° SE |
| Elevation | -75.431° |
| Doppler factor | 1 |
Orbital elements
| Apogee altitude | 1,173.964 km |
| Perigee altitude | 1,067.437 km |
| Semi-major axis | 7,498.837 km |
| Eccentricity | 0.0071029 |
| Inclination | 89.9352° |
| RAAN | 126.8018° |
| Arg. of periapsis | 123.9274° |
| True anomaly | 4.73199° |
| Mean anomaly | 4.6652° |
| Eccentric anomaly | 4.69854° |
| Mean motion | 3.34235 °/min |
| BSTAR | 0.0002462 |
| Orbital period | 107.71 mins |
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Other satellites on launch #65 in the year 1965 (1965-08-13 UTC)
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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2025-01-16 07:21:20.201Z | 166.166° S | 2025-01-16 07:28:20.201Z | 71.799° E | 43.189° | 2025-01-16 07:34:20.201Z | 3.311° NNE |
| 7 mins | 2025-01-16 09:13:20.201Z | 251.744° W | 2025-01-16 09:16:20.201Z | 282.28° WNW | 17.733° | 2025-01-16 09:20:20.201Z | 320.772° NNW |
| 10 mins | 2025-01-16 18:40:20.201Z | 29.201° NE | 2025-01-16 18:44:20.201Z | 77.891° E | 28.922° | 2025-01-16 18:50:20.201Z | 146.059° SSE |
| 10 mins | 2025-01-16 20:27:20.201Z | 341.106° N | 2025-01-16 20:32:20.201Z | 279.197° WNW | 31.293° | 2025-01-16 20:37:20.201Z | 220.47° SW |
Authenticating...
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