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: 11 hours ago
TLE from 11 hours ago
0 PORCUPINE 2
1 1577U 65065J 26237.88279183 .00000096 00000-0 16909-3 0 9991
2 1577 90.0330 212.3178 0067819 267.1923 120.4937 13.36265471971968Epoch: 2026-08-25T21:11Z
TLE epoch observation values (Epoch: 2026-08-25T21:11:13.214Z)
Latitude
28.39305°
Longitude
-79.64877°
Altitude
1,152.841 km
Speed
7.266 km/s
True Right ascension
14h 09m 12s
True Declination
28° 15' 25"
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
23:19:09
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.146 km
Perigee altitude
1,069.439 km
Semi-major axis
7,498.43 km
Eccentricity
0.00678
Inclination
90.033°
RAAN
212.3178°
Arg. of periapsis
267.1923°
True anomaly
121.16047°
Mean anomaly
120.4937°
Eccentric anomaly
120.82737°
Mean motion
3.34263 °/min
Orbital period
107.7 mins
BSTAR
0.00016909
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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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-08-26 10:13:16.357Z | 11.785° NNE | 2026-08-26 10:20:16.357Z | 100.471° ESE | 38.998° | 2026-08-26 10:26:16.357Z | 164.133° S |
| 9 mins | 2026-08-26 12:03:16.357Z | 326.325° NNW | 2026-08-26 12:07:16.357Z | 281.587° WNW | 23.489° | 2026-08-26 12:12:16.357Z | 234.446° WSW |
| 12 mins | 2026-08-26 22:19:16.357Z | 157.083° SSE | 2026-08-26 22:24:16.357Z | 88.664° E | 41.251° | 2026-08-26 22:31:16.357Z | 5.044° NNE |
| 9 mins | 2026-08-27 00:08:16.357Z | 238.407° WSW | 2026-08-27 00:12:16.357Z | 278.63° WNW | 21.175° | 2026-08-27 00:17:16.357Z | 327.138° NNW |
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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