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: 11 hours ago
TLE from 11 hours ago
0 PORCUPINE 2
1 01577U 65065J 25298.79824177 .00000168 00000-0 30484-3 0 9990
2 01577 90.0206 211.4990 0071682 45.9435 12.9153 13.36202832931351Epoch: 2025-10-25T19:09Z
TLE epoch observation values (Epoch: 2025-10-25T19:09:28.088Z)
Latitude
59.13494°
Longitude
-110.32595°
Altitude
1,081.148 km
Speed
7.343 km/s
True Right ascension
14h 05m 51s
True Declination
58° 59' 23"
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
01:37:45
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.279 km
Perigee altitude
1,066.775 km
Semi-major axis
7,498.664 km
Eccentricity
0.00717
Inclination
90.0206°
RAAN
211.499°
Arg. of periapsis
45.9435°
True anomaly
13.10051°
Mean anomaly
12.9153°
Eccentric anomaly
13.00774°
Mean motion
3.34247 °/min
Orbital period
107.7 mins
BSTAR
0.00030484
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-10-26 06:18:42.562Z | 37.929° NE | 2025-10-26 06:20:42.562Z | 94.258° ESE | 40.536° | 2025-10-26 06:26:42.562Z | 166.561° S |
| 9 mins | 2025-10-26 08:03:42.562Z | 327.13° NNW | 2025-10-26 08:07:42.562Z | 284.826° WNW | 21.569° | 2025-10-26 08:12:42.562Z | 237.728° WSW |
| 11 mins | 2025-10-26 18:20:42.562Z | 161.075° S | 2025-10-26 18:25:42.562Z | 83.529° E | 42.325° | 2025-10-26 18:31:42.562Z | 4.546° NNE |
| 7 mins | 2025-10-26 20:10:42.562Z | 248.772° W | 2025-10-26 20:13:42.562Z | 280.234° WNW | 18.009° | 2025-10-26 20:17:42.562Z | 320.527° NNW |
| 10 mins | 2025-10-27 05:37:42.562Z | 29.606° NE | 2025-10-27 05:42:42.562Z | 91.031° ESE | 28.274° | 2025-10-27 05:47:42.562Z | 142.469° SSE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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