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VANGUARD 1, 5

Orbit data source: Space-Track

VANGUARD 1, 5 is a payload satellite owned by NRL (US) in LEO that was launched on Mon, 17 Mar 1958 UTC via a VANGUARD launch vehicle from the Air Force Eastern Test Range (AFETR). 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/5?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/5?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

5, 1958-002B

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

NRL

Mission

Spacecraft

Bus & Motor

NRL 6", Unknown motor

Mass

2 kg wet, 2 kg dry

Launch date (UTC)

1958-03-17 (68 years ago)

Launch vehicle

VANGUARD

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 VANGUARD 1
1 00005U 58002B   26201.29754256  .00000153  00000-0  17727-3 0  9997
2 00005  34.2522 212.1525 1837022 287.7762  53.1395 10.86017563446888

Epoch: 2026-07-20T07:08Z

TLE epoch observation values (Epoch: 2026-07-20T07:08:27.677Z)

Latitude

-0.00001°

Longitude

166.95355°

Altitude

1,503.225 km

Speed

7.41 km/s

True Right ascension

14h 08m 36s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

20:12:54

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,820.977 km

Perigee altitude

655.317 km

Semi-major axis

8,616.284 km

Eccentricity

0.1837

Inclination

34.2522°

RAAN

212.1525°

Arg. of periapsis

287.7762°

True anomaly

72.28434°

Mean anomaly

53.1395°

Eccentric anomaly

62.47335°

Mean motion

2.71371 °/min

Orbital period

132.66 mins

BSTAR

0.00017727

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Other satellites on launch #2 in the year 1958 (1958-03-17 UTC)

VANGUARD DEB, 1576

VANGUARD DEB, 69999

VANGUARD R/B, 16

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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.

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VANGUARD 1 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.
42 mins	2026-07-21 07:49:04.777Z	268.645° W	2026-07-21 08:09:04.777Z	187.063° SSW	43.591°	2026-07-21 08:31:04.777Z	111.995° ESE
37 mins	2026-07-21 10:15:04.777Z	277.029° WNW	2026-07-21 10:35:04.777Z	210.763° SW	37.391°	2026-07-21 10:52:04.777Z	146.629° SSE
22 mins	2026-07-21 12:45:04.777Z	266.729° W	2026-07-21 12:57:04.777Z	232.707° WSW	18.495°	2026-07-21 13:07:04.777Z	197.567° SSW
11 mins	2026-07-22 01:14:04.777Z	145.754° SSE	2026-07-22 01:18:04.777Z	124.784° SE	15.06°	2026-07-22 01:25:04.777Z	97.232° ESE
30 mins	2026-07-22 03:27:04.777Z	214.328° SW	2026-07-22 03:38:04.777Z	145.918° SSE	37.129°	2026-07-22 03:57:04.777Z	81.79° E
38 mins	2026-07-22 05:47:04.777Z	251.086° W	2026-07-22 06:02:04.777Z	169.794° S	43.711°	2026-07-22 06:25:04.777Z	93.786° ESE

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out VANGUARD 1, 5 on other resources

View VANGUARD 1, 5 on NASA - NSSDCA Website

View VANGUARD 1, 5 on Heavens-Above

View VANGUARD 1, 5 on Keep Track

View VANGUARD 1, 5 on Celestrak

View VANGUARD 1, 5 on Gunter's Space Page

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

VANGUARD 1, 5

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-07-20T07:08:27.677Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #2 in the year 1958 (1958-03-17 UTC)

VANGUARD 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out VANGUARD 1, 5 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago