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: 15 hours ago
TLE from 15 hours ago
0 PORCUPINE 2
1 1577U 65065J 25312.71966294 .00000181 00000-0 33080-3 0 9996
2 1577 90.0208 211.5296 0070614 7.2308 19.0752 13.36207150933215Epoch: 2025-11-08T17:16Z
TLE epoch observation values (Epoch: 2025-11-08T17:16:18.878Z)
Latitude
26.6061°
Longitude
-95.70466°
Altitude
1,076.689 km
Speed
7.34 km/s
True Right ascension
14h 06m 04s
True Declination
26° 28' 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
04:12:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,173.462 km
Perigee altitude
1,067.56 km
Semi-major axis
7,498.648 km
Eccentricity
0.00706
Inclination
90.0208°
RAAN
211.5296°
Arg. of periapsis
7.2308°
True anomaly
19.34187°
Mean anomaly
19.0752°
Eccentric anomaly
19.20831°
Mean motion
3.34248 °/min
Orbital period
107.7 mins
BSTAR
0.0003308
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2025-11-09 16:37:34.159Z | 129.441° SE | 2025-11-09 16:42:34.159Z | 76.772° E | 25.343° | 2025-11-09 16:47:34.159Z | 22.989° NE |
| 10 mins | 2025-11-09 18:25:34.159Z | 209.814° SW | 2025-11-09 18:29:34.159Z | 265.283° W | 35.345° | 2025-11-09 18:35:34.159Z | 343.048° N |
| 5 mins | 2025-11-10 03:56:34.159Z | 58.679° ENE | 2025-11-10 03:58:34.159Z | 76.977° E | 13.656° | 2025-11-10 04:01:34.159Z | 102.977° ESE |
| 12 mins | 2025-11-10 05:41:34.159Z | 2.957° NNE | 2025-11-10 05:46:34.159Z | 17.421° NNE | 44.829° | 2025-11-10 05:53:34.159Z | 183.489° SSW |
| 5 mins | 2025-11-10 07:31:34.159Z | 308.158° NW | 2025-11-10 07:33:34.159Z | 289.249° WNW | 14.828° | 2025-11-10 07:36:34.159Z | 262.557° W |
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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