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, 0.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 PORCUPINE 2
1 01577U 65065J 26236.41139394 .00000092 00000-0 16078-3 0 9991
2 01577 90.0328 212.3128 0067823 271.4665 242.1316 13.36265184971768Epoch: 2026-08-24T09:52Z
TLE epoch observation values (Epoch: 2026-08-24T09:52:24.436Z)
Latitude
27.12114°
Longitude
-88.46578°
Altitude
1,150.632 km
Speed
7.268 km/s
True Right ascension
02h 09m 19s
True Declination
26° 59' 21"
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
18:55:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.15 km
Perigee altitude
1,069.437 km
Semi-major axis
7,498.431 km
Eccentricity
0.00678
Inclination
90.0328°
RAAN
212.3128°
Arg. of periapsis
271.4665°
True anomaly
241.44727°
Mean anomaly
242.1316°
Eccentric anomaly
241.78916°
Mean motion
3.34262 °/min
Orbital period
107.7 mins
BSTAR
0.00016078
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-08-25 09:05:57.025Z | 42.847° NE | 2026-08-25 09:09:57.025Z | 78.275° E | 14.749° | 2026-08-25 09:12:57.025Z | 105.12° ESE |
| 12 mins | 2026-08-25 10:52:57.025Z | 0.978° NNE | 2026-08-25 10:57:57.025Z | 312.966° NW | 44.888° | 2026-08-25 11:04:57.025Z | 186.225° SSW |
| 4 mins | 2026-08-25 12:42:57.025Z | 306.455° NW | 2026-08-25 12:44:57.025Z | 288.068° WNW | 13.593° | 2026-08-25 12:46:57.025Z | 270.318° WNW |
| 7 mins | 2026-08-25 21:12:57.025Z | 98.393° ESE | 2026-08-25 21:15:57.025Z | 69.214° E | 17.162° | 2026-08-25 21:19:57.025Z | 33.266° NE |
| 12 mins | 2026-08-25 22:56:57.025Z | 183.018° SSW | 2026-08-25 23:02:57.025Z | 305.921° NW | 43.992° | 2026-08-25 23:08:57.025Z | 354.567° N |
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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