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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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
SURCAL, Unknown motor
Mass
5 kg wet, 5 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 8 hours ago
TLE from 8 hours ago
0 PORCUPINE 2
1 1577U 65065J 26087.84104267 .00000087 00000-0 15040-3 0 9995
2 1577 90.0287 211.8412 0068727 331.6232 141.2668 13.36241812951922Epoch: 2026-03-28T20:11Z
TLE epoch observation values (Epoch: 2026-03-28T20:11:06.086Z)
Latitude
66.69764°
Longitude
-97.12337°
Altitude
1,175.292 km
Speed
7.252 km/s
True Right ascension
02h 07m 37s
True Declination
66° 34' 46"
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
09:49:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.916 km
Perigee altitude
1,068.846 km
Semi-major axis
7,498.518 km
Eccentricity
0.00687
Inclination
90.0287°
RAAN
211.8412°
Arg. of periapsis
331.6232°
True anomaly
141.75628°
Mean anomaly
141.2668°
Eccentric anomaly
141.51187°
Mean motion
3.34257 °/min
Orbital period
107.7 mins
BSTAR
0.0001504
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-03-29 08:17:19.853Z | 165.235° S | 2026-03-29 08:24:19.853Z | 59.799° ENE | 42.645° | 2026-03-29 08:30:19.853Z | 3.267° NNE |
| 7 mins | 2026-03-29 10:09:19.853Z | 253.461° W | 2026-03-29 10:12:19.853Z | 285.026° WNW | 17.889° | 2026-03-29 10:16:19.853Z | 322.695° NNW |
| 10 mins | 2026-03-29 19:36:19.853Z | 29.071° NE | 2026-03-29 19:41:19.853Z | 91.354° ESE | 29.878° | 2026-03-29 19:46:19.853Z | 143.741° SSE |
| 11 mins | 2026-03-29 21:23:19.853Z | 342.071° N | 2026-03-29 21:28:19.853Z | 283.459° WNW | 33.067° | 2026-03-29 21:34:19.853Z | 217.135° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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