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: 9 hours ago
TLE from 9 hours ago
0 PORCUPINE 2
1 01577U 65065J 25344.18983953 .00000141 00000-0 25601-3 0 9999
2 01577 90.0191 211.5982 0068401 277.3466 203.2030 13.36217725937415Epoch: 2025-12-10T04:33Z
TLE epoch observation values (Epoch: 2025-12-10T04:33:22.135Z)
Latitude
59.84549°
Longitude
-115.87505°
Altitude
1,180.874 km
Speed
7.246 km/s
True Right ascension
02h 06m 31s
True Declination
59° 42' 15"
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
12:18:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,171.763 km
Perigee altitude
1,069.18 km
Semi-major axis
7,498.608 km
Eccentricity
0.00684
Inclination
90.0191°
RAAN
211.5982°
Arg. of periapsis
277.3466°
True anomaly
202.89659°
Mean anomaly
203.203°
Eccentric anomaly
203.04956°
Mean motion
3.34251 °/min
Orbital period
107.7 mins
BSTAR
0.00025601
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Other satellites on launch #65 in the year 1965 (1965-08-13 UTC)
Did you know?
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 | 2025-12-10 14:50:39.568Z | 141.036° SSE | 2025-12-10 14:56:39.568Z | 73.235° E | 31.894° | 2025-12-10 15:02:39.568Z | 13.749° NNE |
| 11 mins | 2025-12-10 16:38:39.568Z | 215.632° SW | 2025-12-10 16:43:39.568Z | 271.37° WNW | 30.545° | 2025-12-10 16:49:39.568Z | 338.306° N |
| 7 mins | 2025-12-11 02:09:39.568Z | 45.755° ENE | 2025-12-11 02:12:39.568Z | 74.997° E | 18.128° | 2025-12-11 02:16:39.568Z | 113.749° SE |
| 12 mins | 2025-12-11 03:55:39.568Z | 356.147° N | 2025-12-11 04:00:39.568Z | 303.689° NW | 43.204° | 2025-12-11 04:07:39.568Z | 193.608° 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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