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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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Iframe URL

https://www.satcat.com/sats-embedded/1577?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

1577, 1965-065J

Orbit

LEO

Last TLE update

19 hours ago

Origin

United States Navy (US)

Manufacturer

NRL

Mission

Defense Calibration

Bus & Motor

SURCAL, Unknown motor

Mass

5 kg wet, 5 kg dry

Launch date (UTC)

1965-08-13 (60 years ago)

Launch vehicle

THOR ABLESTAR

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box, 0.1 m

Radar Cross Section

0.060 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 19 hours ago

0 PORCUPINE 2
1  1577U 65065J   25223.98875441  .00000086  00000-0  14898-3 0  9999
2  1577  90.0088 211.3750 0068025 255.8868 158.6900 13.36183019921768

Epoch: 2025-08-11T23:43Z

TLE epoch observation values (Epoch: 2025-08-11T23:43:48.381Z)

Latitude

54.9503°

Longitude

-105.27692°

Altitude

1,180.288 km

Speed

7.245 km/s

True Right ascension

14h 05m 27s

True Declination

54° 47' 51"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-25.20787°

Longitude

74.73212°

Altitude

1,099.092 km

Speed

7.318 km/s

Apparent Right ascension

23h 58m 46s

Apparent Declination

-38° 24' 20"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

08:52:42

Azimuth

257.078° W

Elevation

-54.313°

Doppler factor

Orbital elements

Apogee altitude

1,171.612 km

Perigee altitude

1,069.591 km

Semi-major axis

7,498.738 km

Eccentricity

0.0068

Inclination

90.0088°

RAAN

211.375°

Arg. of periapsis

255.8868°

True anomaly

158.97106°

Mean anomaly

158.69°

Eccentric anomaly

158.83075°

Mean motion

3.34242 °/min

Orbital period

107.71 mins

BSTAR

0.00014898

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Other satellites on launch #65 in the year 1965 (1965-08-13 UTC)

THOR ABLESTAR DEB, 1504

THOR ABLESTAR R/B, 1508

DODECAPOLE 2, 1510

THOR ABLESTAR DEB, 1511

TEMPSAT 1, 1512

OPS 8464 (TRANSIT 5B-7), 1514

NAVSPASUR ROD 1, 1515

CALSPHERE 4(A), 1520

THOR ABLESTAR DEB, 1521

THOR ABLESTAR DEB, 1522

OPS 8464 DEB *, 2335 (Decayed)

TRANSIT 5B-7 DEB, 3809 (Decayed)

THOR ABLESTAR DEB, 3810

THOR ABLESTAR DEB, 5265

PORCUPINE 2 Visibility forecast

Observer location: undefined°, undefined°
Set Observer location

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	2025-08-12 22:55:21.584Z	150.47° SSE	2025-08-12 23:01:21.584Z	80.575° E	37.1°	2025-08-12 23:07:21.584Z	10.917° NNE
10 mins	2025-08-13 00:44:21.584Z	226.968° WSW	2025-08-13 00:49:21.584Z	281.504° WNW	25.755°	2025-08-13 00:54:21.584Z	332.067° NNW
9 mins	2025-08-13 10:14:21.584Z	39.076° NE	2025-08-13 10:18:21.584Z	82.326° E	22.3°	2025-08-13 10:23:21.584Z	130.647° SE
12 mins	2025-08-13 12:00:21.584Z	351.464° N	2025-08-13 12:06:21.584Z	270.105° WNW	39.827°	2025-08-13 12:12:21.584Z	203.014° SW

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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Authenticating...

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Check out PORCUPINE 2, 1577 on other resources

View PORCUPINE 2, 1577 on NASA - NSSDCA Website

View PORCUPINE 2, 1577 on Heavens-Above

View PORCUPINE 2, 1577 on Keep Track

View PORCUPINE 2, 1577 on Celestrak

View PORCUPINE 2, 1577 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.