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: 6 hours ago
TLE from 6 hours ago
0 PORCUPINE 2
1 1577U 65065J 26128.19017660 .00000121 00000-0 21643-3 0 9994
2 1577 90.0318 211.9689 0069020 215.0119 202.8896 13.36249833957317Epoch: 2026-05-08T04:33Z
TLE epoch observation values (Epoch: 2026-05-08T04:33:51.258Z)
Latitude
57.68709°
Longitude
-82.57022°
Altitude
1,180.819 km
Speed
7.245 km/s
True Right ascension
14h 07m 40s
True Declination
57° 32' 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
18:42:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,172.106 km
Perigee altitude
1,068.597 km
Semi-major axis
7,498.488 km
Eccentricity
0.0069
Inclination
90.0318°
RAAN
211.9689°
Arg. of periapsis
215.0119°
True anomaly
202.5844°
Mean anomaly
202.8896°
Eccentric anomaly
202.73676°
Mean motion
3.34259 °/min
Orbital period
107.7 mins
BSTAR
0.00021643
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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 | 2026-05-08 17:27:35.651Z | 12.623° NNE | 2026-05-08 17:33:35.651Z | 91.385° ESE | 39.72° | 2026-05-08 17:39:35.651Z | 165.071° S |
| 9 mins | 2026-05-08 19:16:35.651Z | 328.274° NNW | 2026-05-08 19:20:35.651Z | 285.689° WNW | 22.036° | 2026-05-08 19:25:35.651Z | 236.921° WSW |
| 12 mins | 2026-05-09 05:32:35.651Z | 160.047° S | 2026-05-09 05:38:35.651Z | 65.852° ENE | 41.793° | 2026-05-09 05:44:35.651Z | 4.985° NNE |
| 8 mins | 2026-05-09 07:22:35.651Z | 243.608° WSW | 2026-05-09 07:26:35.651Z | 284.871° WNW | 20.503° | 2026-05-09 07:30:35.651Z | 323.24° 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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