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: 6 hours ago
TLE from 6 hours ago
0 PORCUPINE 2
1 1577U 65065J 25343.14111759 .00000158 00000-0 28809-3 0 9992
2 1577 90.0192 211.5959 0068430 280.3805 198.3739 13.36217398937273Epoch: 2025-12-09T03:23Z
TLE epoch observation values (Epoch: 2025-12-09T03:23:12.559Z)
Latitude
61.57719°
Longitude
-97.30119°
Altitude
1,182.777 km
Speed
7.244 km/s
True Right ascension
02h 06m 31s
True Declination
61° 26' 28"
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
07:38:04
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.786 km
Perigee altitude
1,069.16 km
Semi-major axis
7,498.61 km
Eccentricity
0.00684
Inclination
90.0192°
RAAN
211.5959°
Arg. of periapsis
280.3805°
True anomaly
198.12871°
Mean anomaly
198.3739°
Eccentric anomaly
198.25111°
Mean motion
3.3425 °/min
Orbital period
107.7 mins
BSTAR
0.00028809
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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 | 2025-12-09 15:29:02.658Z | 162.231° S | 2025-12-09 15:34:02.658Z | 97.162° ESE | 42.772° | 2025-12-09 15:41:02.658Z | 3.325° NNE |
| 8 mins | 2025-12-09 17:19:02.658Z | 247.528° W | 2025-12-09 17:22:02.658Z | 277.378° WNW | 18.913° | 2025-12-09 17:27:02.658Z | 324.791° NNW |
| 10 mins | 2025-12-10 02:47:02.658Z | 30.24° NE | 2025-12-10 02:51:02.658Z | 76.762° E | 29.395° | 2025-12-10 02:57:02.658Z | 144.053° SSE |
| 11 mins | 2025-12-10 04:34:02.658Z | 341.759° N | 2025-12-10 04:39:02.658Z | 280.75° WNW | 33.253° | 2025-12-10 04:45:02.658Z | 215.971° 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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