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: 2 hours ago
TLE from 2 hours ago
0 PORCUPINE 2
1 1577U 65065J 25300.54563088 .00000157 00000-0 28437-3 0 9991
2 1577 90.0207 211.5028 0071579 41.1125 138.3354 13.36203357931588Epoch: 2025-10-27T13:05Z
TLE epoch observation values (Epoch: 2025-10-27T13:05:42.508Z)
Latitude
-0.10413°
Longitude
158.92971°
Altitude
1,166.693 km
Speed
7.25 km/s
True Right ascension
02h 06m 00s
True Declination
0° 06' 13"
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
10:43:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,174.2 km
Perigee altitude
1,066.851 km
Semi-major axis
7,498.662 km
Eccentricity
0.00716
Inclination
90.0207°
RAAN
211.5028°
Arg. of periapsis
41.1125°
True anomaly
138.87704°
Mean anomaly
138.3354°
Eccentric anomaly
138.60658°
Mean motion
3.34247 °/min
Orbital period
107.7 mins
BSTAR
0.00028437
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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 | 2025-10-27 17:41:58.319Z | 141.285° SSE | 2025-10-27 17:47:58.319Z | 74.98° E | 30.344° | 2025-10-27 17:52:58.319Z | 18.102° NNE |
| 10 mins | 2025-10-27 19:30:58.319Z | 219.731° SW | 2025-10-27 19:34:58.319Z | 269.349° W | 29.769° | 2025-10-27 19:40:58.319Z | 338.879° N |
| 7 mins | 2025-10-28 05:00:58.319Z | 50.088° ENE | 2025-10-28 05:03:58.319Z | 80.322° E | 17.139° | 2025-10-28 05:07:58.319Z | 116.875° SE |
| 11 mins | 2025-10-28 06:46:58.319Z | 356.266° N | 2025-10-28 06:51:58.319Z | 272.322° WNW | 43.859° | 2025-10-28 06:57:58.319Z | 192.944° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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