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
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: 10 hours ago
TLE from 10 hours ago
0 PORCUPINE 2
1 01577U 65065J 26038.04824851 .00000137 00000-0 24520-3 0 9990
2 01577 90.0193 211.7161 0071684 110.4991 16.9589 13.36232306945278Epoch: 2026-02-07T01:09Z
TLE epoch observation values (Epoch: 2026-02-07T01:09:28.671Z)
Latitude
52.39475°
Longitude
-122.8058°
Altitude
1,080.507 km
Speed
7.342 km/s
True Right ascension
02h 06m 57s
True Declination
52° 14' 08"
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
12:53:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.17 km
Perigee altitude
1,066.664 km
Semi-major axis
7,498.554 km
Eccentricity
0.00717
Inclination
90.0193°
RAAN
211.7161°
Arg. of periapsis
110.4991°
True anomaly
17.20057°
Mean anomaly
16.9589°
Eccentric anomaly
17.07953°
Mean motion
3.34254 °/min
Orbital period
107.7 mins
BSTAR
0.0002452
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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 | 2026-02-07 11:24:08.914Z | 159.154° S | 2026-02-07 11:30:08.914Z | 99.343° ESE | 40.111° | 2026-02-07 11:36:08.914Z | 8.002° NNE |
| 8 mins | 2026-02-07 13:15:08.914Z | 242.841° WSW | 2026-02-07 13:18:08.914Z | 274.843° WNW | 20.739° | 2026-02-07 13:23:08.914Z | 326.216° NNW |
| 9 mins | 2026-02-07 22:43:08.914Z | 36.683° NE | 2026-02-07 22:47:08.914Z | 85.599° E | 24.978° | 2026-02-07 22:52:08.914Z | 137.432° SSE |
| 10 mins | 2026-02-08 00:30:08.914Z | 343.074° N | 2026-02-08 00:35:08.914Z | 267.168° W | 35.209° | 2026-02-08 00:40:08.914Z | 211.89° 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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