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, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 PORCUPINE 2
1 1577U 65065J 26308.04167490 .00000083 00000-0 14010-3 0 9992
2 1577 90.0432 212.5983 0071694 69.3779 304.9803 13.36277509981332Epoch: 2026-11-04T01:00Z
TLE epoch observation values (Epoch: 2026-11-04T01:00:00.711Z)
Latitude
13.64791°
Longitude
154.28922°
Altitude
1,094.8 km
Speed
7.321 km/s
True Right ascension
14h 10m 21s
True Declination
13° 34' 22"
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
09:48:13
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.007 km
Perigee altitude
1,066.489 km
Semi-major axis
7,498.385 km
Eccentricity
0.00717
Inclination
90.0432°
RAAN
212.5983°
Arg. of periapsis
69.3779°
True anomaly
304.3037°
Mean anomaly
304.9803°
Eccentric anomaly
304.64235°
Mean motion
3.34266 °/min
Orbital period
107.7 mins
BSTAR
0.0001401
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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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-11-04 17:13:24.066Z | 136.624° SSE | 2026-11-04 17:18:24.066Z | 81.555° E | 34.191° | 2026-11-04 17:24:24.066Z | 16.115° NNE |
| 10 mins | 2026-11-04 19:01:24.066Z | 215.779° SW | 2026-11-04 19:06:24.066Z | 281.859° WNW | 36.989° | 2026-11-04 19:11:24.066Z | 338.109° N |
| 7 mins | 2026-11-05 04:31:24.066Z | 48.364° ENE | 2026-11-05 04:34:24.066Z | 77.508° E | 16.501° | 2026-11-05 04:38:24.066Z | 114.092° SE |
| 12 mins | 2026-11-05 06:17:24.066Z | 358.126° N | 2026-11-05 06:22:24.066Z | 296.702° NW | 76.807° | 2026-11-05 06:29:24.066Z | 190.196° SSW |
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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