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: 16 hours ago
TLE from 16 hours ago
0 PORCUPINE 2
1 01577U 65065J 26111.55821124 .00000097 00000-0 17058-3 0 9991
2 01577 90.0314 211.9146 0067986 262.9903 113.9073 13.36246245955098Epoch: 2026-04-21T13:23Z
TLE epoch observation values (Epoch: 2026-04-21T13:23:49.451Z)
Latitude
17.59547°
Longitude
161.31638°
Altitude
1,146.615 km
Speed
7.271 km/s
True Right ascension
14h 07m 37s
True Declination
17° 30' 06"
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
12:07:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.344 km
Perigee altitude
1,069.385 km
Semi-major axis
7,498.502 km
Eccentricity
0.0068
Inclination
90.0314°
RAAN
211.9146°
Arg. of periapsis
262.9903°
True anomaly
114.61706°
Mean anomaly
113.9073°
Eccentric anomaly
114.26242°
Mean motion
3.34258 °/min
Orbital period
107.7 mins
BSTAR
0.00017058
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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 | 2026-04-22 05:37:02.559Z | 118.343° SE | 2026-04-22 05:42:02.559Z | 70.962° E | 20.882° | 2026-04-22 05:47:02.559Z | 25.473° NE |
| 12 mins | 2026-04-22 07:23:02.559Z | 191.566° SSW | 2026-04-22 07:29:02.559Z | 280.498° WNW | 41.803° | 2026-04-22 07:35:02.559Z | 350.072° N |
| 12 mins | 2026-04-22 18:41:02.559Z | 10.973° NNE | 2026-04-22 18:46:02.559Z | 81.824° E | 42.674° | 2026-04-22 18:53:02.559Z | 172.785° S |
| 7 mins | 2026-04-22 20:30:02.559Z | 319.148° NNW | 2026-04-22 20:33:02.559Z | 288.075° WNW | 19.599° | 2026-04-22 20:37:02.559Z | 248.992° W |
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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