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 26039.24570780 .00000138 00000-0 24615-3 0 9998
2 01577 90.0195 211.7186 0071706 107.2003 17.1799 13.36232579945436Epoch: 2026-02-08T05:53Z
TLE epoch observation values (Epoch: 2026-02-08T05:53:49.153Z)
Latitude
55.46887°
Longitude
164.93435°
Altitude
1,081.259 km
Speed
7.342 km/s
True Right ascension
02h 06m 59s
True Declination
55° 18' 54"
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
17:56:24
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.185 km
Perigee altitude
1,066.647 km
Semi-major axis
7,498.553 km
Eccentricity
0.00717
Inclination
90.0195°
RAAN
211.7186°
Arg. of periapsis
107.2003°
True anomaly
17.4247°
Mean anomaly
17.1799°
Eccentric anomaly
17.30209°
Mean motion
3.34254 °/min
Orbital period
107.7 mins
BSTAR
0.00024615
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-02-08 22:05:50.375Z | 52.454° ENE | 2026-02-08 22:07:50.375Z | 71.548° E | 14.103° | 2026-02-08 22:10:50.375Z | 100.624° ESE |
| 11 mins | 2026-02-08 23:51:50.375Z | 359.629° N | 2026-02-08 23:56:50.375Z | 243.541° WSW | 44.674° | 2026-02-09 00:02:50.375Z | 187.86° SSW |
| 7 mins | 2026-02-09 10:11:50.375Z | 102.736° ESE | 2026-02-09 10:14:50.375Z | 73.266° E | 16.997° | 2026-02-09 10:18:50.375Z | 34.773° NE |
| 11 mins | 2026-02-09 11:56:50.375Z | 186.269° SSW | 2026-02-09 12:01:50.375Z | 271.583° WNW | 43.798° | 2026-02-09 12:07:50.375Z | 353.217° 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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