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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 src="https://www.satcat.com/sats-embedded/1577?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

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

12 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, 0.2 m

Radar Cross Section

0.060 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 12 hours ago

0 PORCUPINE 2
1 01577U 65065J   25184.53786434  .00000064  00000-0  10511-3 0  9993
2 01577  90.0067 211.3381 0070343   9.2756 108.1544 13.36176224916092

Epoch: 2025-07-03T12:54Z

TLE epoch observation values (Epoch: 2025-07-03T12:54:31.478Z)

Latitude

61.89258°

Longitude

-84.08376°

Altitude

1,151.016 km

Speed

7.275 km/s

True Right ascension

02h 05m 24s

True Declination

61° 45' 25"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

83.68956°

Longitude

95.84382°

Altitude

1,124.031 km

Speed

7.304 km/s

Apparent Right ascension

00h 56m 21s

Apparent Declination

39° 21' 13"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

13:07:47

Azimuth

2.25° NNE

Elevation

-10.687°

Doppler factor

Orbital elements

Apogee altitude

1,173.375 km

Perigee altitude

1,067.878 km

Semi-major axis

7,498.764 km

Eccentricity

0.00703

Inclination

90.0067°

RAAN

211.3381°

Arg. of periapsis

9.2756°

True anomaly

Unknown

Mean anomaly

108.1544°

Eccentric anomaly

Unknown

Mean motion

3.3424 °/min

Orbital period

107.71 mins

BSTAR

0.00010511

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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°

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	2025-07-04 02:48:00.681Z	201.292° SSW	2025-07-04 02:54:00.681Z	277.466° WNW	36.37°	2025-07-04 03:00:00.681Z	345.57° N
4 mins	2025-07-04 12:21:00.681Z	63.155° ENE	2025-07-04 12:22:00.681Z	72.185° E	12.958°	2025-07-04 12:25:00.681Z	98.418° ESE
12 mins	2025-07-04 14:05:00.681Z	3.706° NNE	2025-07-04 14:11:00.681Z	135.481° SSE	44.831°	2025-07-04 14:17:00.681Z	181.72° SSW
6 mins	2025-07-04 15:55:00.681Z	313.089° NW	2025-07-04 15:57:00.681Z	294.404° NW	15.366°	2025-07-04 16:01:00.681Z	258.358° W
5 mins	2025-07-05 00:27:00.681Z	89.239° E	2025-07-05 00:29:00.681Z	69.86° E	14.093°	2025-07-05 00:32:00.681Z	41.866° NE

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

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