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 | 12 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 12 hours ago
0 CALSPHERE 4(A)
1 1520U 65065H 24356.10568140 .00000194 00000-0 35506-3 0 9991
2 1520 89.9343 126.9614 0069307 194.8510 227.6110 13.36146279890590Epoch: 2024-12-21T02:32Z
Definitive object data (Epoch: 2024-12-21T02:32:10.872Z)
| Latitude | 61.9647° |
| Longitude | -1.12276° |
| Altitude | 1,169.617 km |
| Speed | 7.257 km/s |
| True Right ascension | 08h 28m 20s |
| True Declination | 61° 49' 46" |
| Sunlit | Object was in full shadow at TLE epoch |
Visualization TLE readout
| Latitude | 37.49564° |
| Longitude | -1.19872° |
| Altitude | 1,176.306 km |
| Speed | 7.246 km/s |
| Apparent Right ascension | 05h 40m 47s |
| Apparent Declination | 3° 58' 04" |
| Sunlit | Object is in full shadow |
Visualization observer readout
| Local Sidereal Time | 14:01:51 |
| Azimuth | 297.423° NW |
| Elevation | -23.412° |
| Doppler factor | 1 |
Orbital elements
| Apogee altitude | 1,172.711 km |
| Perigee altitude | 1,068.767 km |
| Semi-major axis | 7,498.876 km |
| Eccentricity | 0.0069307 |
| Inclination | 89.9343° |
| RAAN | 126.9614° |
| Arg. of periapsis | 194.851° |
| True anomaly | 227.02783° |
| Mean anomaly | 227.611° |
| Eccentric anomaly | 227.31908° |
| Mean motion | 3.34233 °/min |
| BSTAR | 0.00035506 |
| 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. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2024-12-21 20:47:37.790Z | 11.735° NNE | 2024-12-21 20:53:37.790Z | 76.148° E | 38.827° | 2024-12-21 20:59:37.790Z | 162.59° S |
| 8 mins | 2024-12-21 22:37:37.790Z | 324.718° NNW | 2024-12-21 22:40:37.790Z | 291.93° WNW | 22.17° | 2024-12-21 22:45:37.790Z | 238.898° WSW |
| 12 mins | 2024-12-22 08:53:37.790Z | 157.786° S | 2024-12-22 08:58:37.790Z | 93.036° ESE | 41.375° | 2024-12-22 09:05:37.790Z | 5.175° NNE |
| 9 mins | 2024-12-22 10:42:37.790Z | 237.97° WSW | 2024-12-22 10:46:37.790Z | 277.266° WNW | 21.12° | 2024-12-22 10:51:37.790Z | 326.314° NNW |
Authenticating...
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