PORCUPINE 2, 1577
Orbit data source: Space-Track
PORCUPINE 2, 1577 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). 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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1577 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Defense Calibration
Bus & Motor
SURCAL, Unknown motor
Mass
5 kg wet, 5 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box, 0.1 m
Radar Cross Section
0.060 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 PORCUPINE 2
1 01577U 65065J 25261.13229491 .00000120 00000-0 21241-3 0 9995
2 01577 90.0155 211.4256 0070843 149.8017 270.5078 13.36191180926329Epoch: 2025-09-18T03:10Z
TLE epoch observation values (Epoch: 2025-09-18T03:10:30.28Z)
Latitude
59.58735°
Longitude
166.47488°
Altitude
1,133.599 km
Speed
7.292 km/s
True Right ascension
14h 05m 35s
True Declination
59° 26' 40"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
05:26:02
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,173.694 km
Perigee altitude
1,067.448 km
Semi-major axis
7,498.708 km
Eccentricity
0.00708
Inclination
90.0155°
RAAN
211.4256°
Arg. of periapsis
149.8017°
True anomaly
269.69599°
Mean anomaly
270.5078°
Eccentric anomaly
270.1019°
Mean motion
3.34244 °/min
Orbital period
107.71 mins
BSTAR
0.00021241
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Other satellites on launch #65 in the year 1965 (1965-08-13 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.PORCUPINE 2 Visibility forecast
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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 | 2025-09-18 20:57:46.216Z | 167.46° S | 2025-09-18 21:02:46.216Z | 104.655° ESE | 44.066° | 2025-09-18 21:09:46.216Z | 1.231° NNE |
| 6 mins | 2025-09-18 22:48:46.216Z | 258.106° W | 2025-09-18 22:50:46.216Z | 277.714° WNW | 16.627° | 2025-09-18 22:54:46.216Z | 316.164° NNW |
| 10 mins | 2025-09-19 08:14:46.216Z | 24.383° NE | 2025-09-19 08:19:46.216Z | 86.323° E | 30.638° | 2025-09-19 08:24:46.216Z | 145.953° SSE |
| 10 mins | 2025-09-19 10:02:46.216Z | 337.044° NNW | 2025-09-19 10:06:46.216Z | 289.261° WNW | 29.502° | 2025-09-19 10:12:46.216Z | 220.768° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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