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: 11 hours ago
TLE from 11 hours ago
0 PORCUPINE 2
1 1577U 65065J 26129.16510955 .00000109 00000-0 19220-3 0 9991
2 1577 90.0318 211.9721 0069101 212.2254 212.8400 13.36250079957443Epoch: 2026-05-09T03:57Z
TLE epoch observation values (Epoch: 2026-05-09T03:57:45.465Z)
Latitude
64.7202°
Longitude
-74.52079°
Altitude
1,178.191 km
Speed
7.249 km/s
True Right ascension
14h 07m 37s
True Declination
64° 35' 40"
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
23:11:15
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,172.166 km
Perigee altitude
1,068.535 km
Semi-major axis
7,498.487 km
Eccentricity
0.00691
Inclination
90.0318°
RAAN
211.9721°
Arg. of periapsis
212.2254°
True anomaly
212.41369°
Mean anomaly
212.84°
Eccentric anomaly
212.62654°
Mean motion
3.34259 °/min
Orbital period
107.7 mins
BSTAR
0.0001922
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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 | 2026-05-09 16:49:57.633Z | 26.331° NE | 2026-05-09 16:54:57.633Z | 80.388° E | 27.214° | 2026-05-09 16:59:57.633Z | 137.862° SSE |
| 11 mins | 2026-05-09 18:37:57.633Z | 342.581° N | 2026-05-09 18:42:57.633Z | 276.064° WNW | 34.036° | 2026-05-09 18:48:57.633Z | 212.57° SW |
| 11 mins | 2026-05-10 04:54:57.633Z | 136.711° SSE | 2026-05-10 04:59:57.633Z | 83.615° E | 30.737° | 2026-05-10 05:05:57.633Z | 17.119° NNE |
| 11 mins | 2026-05-10 06:42:57.633Z | 215.928° SW | 2026-05-10 06:47:57.633Z | 279.468° WNW | 32.252° | 2026-05-10 06:53:57.633Z | 341.268° N |
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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