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
BOX, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 PORCUPINE 2
1 1577U 65065J 26305.22489338 .00000100 00000-0 17364-3 0 9992
2 1577 90.0432 212.5859 0071739 77.1194 74.7851 13.36277030980953Epoch: 2026-11-01T05:23Z
TLE epoch observation values (Epoch: 2026-11-01T05:23:50.788Z)
Latitude
27.33664°
Longitude
-88.87282°
Altitude
1,112.799 km
Speed
7.305 km/s
True Right ascension
02h 10m 25s
True Declination
27° 12' 12"
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
06:03:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.042 km
Perigee altitude
1,066.457 km
Semi-major axis
7,498.386 km
Eccentricity
0.00717
Inclination
90.0432°
RAAN
212.5859°
Arg. of periapsis
77.1194°
True anomaly
75.5802°
Mean anomaly
74.7851°
Eccentric anomaly
75.18247°
Mean motion
3.34265 °/min
Orbital period
107.7 mins
BSTAR
0.00017364
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-11-01 17:20:42.954Z | 132.581° SE | 2026-11-01 17:25:42.954Z | 76.499° E | 31.69° | 2026-11-01 17:30:42.954Z | 20.902° NNE |
| 10 mins | 2026-11-01 19:08:42.954Z | 214.524° SW | 2026-11-01 19:12:42.954Z | 267.042° W | 40.306° | 2026-11-01 19:18:42.954Z | 340.957° N |
| 6 mins | 2026-11-02 04:38:42.954Z | 51.743° ENE | 2026-11-02 04:41:42.954Z | 80.452° E | 14.816° | 2026-11-02 04:44:42.954Z | 107.511° ESE |
| 11 mins | 2026-11-02 06:24:42.954Z | 0.093° NNE | 2026-11-02 06:29:42.954Z | 259.22° W | 83.477° | 2026-11-02 06:35:42.954Z | 187.469° SSW |
| 4 mins | 2026-11-02 08:14:42.954Z | 304.691° NW | 2026-11-02 08:15:42.954Z | 295.516° NW | 12.571° | 2026-11-02 08:18:42.954Z | 268.726° W |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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