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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

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 19 hours ago

TLE from 19 hours ago

0 VANGUARD 1
1 00005U 58002B   26067.66433402  .00000224  00000-0  31278-3 0  9991
2 00005  34.2419 264.5468 1837399  45.2139 328.3992 10.85956128432357

Epoch: 2026-03-08T15:56Z

TLE epoch observation values (Epoch: 2026-03-08T15:56:38.459Z)

Latitude

-0.00002°

Longitude

-140.98185°

Altitude

989.199 km

Speed

7.872 km/s

True Right ascension

17h 38m 11s

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

15:07:38

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,821.688 km

Perigee altitude

655.258 km

Semi-major axis

8,616.61 km

Eccentricity

0.18374

Inclination

34.2419°

RAAN

264.5468°

Arg. of periapsis

45.2139°

True anomaly

314.8465°

Mean anomaly

328.3992°

Eccentric anomaly

321.90391°

Mean motion

2.71355 °/min

Orbital period

132.67 mins

BSTAR

0.00031278

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

VANGUARD DEB, 1576

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.
6 mins	2026-03-09 16:26:31.087Z	196.101° SSW	2026-03-09 16:29:31.087Z	148.994° SSE	18.154°	2026-03-09 16:32:31.087Z	109.02° ESE
9 mins	2026-03-09 18:45:31.087Z	236.522° WSW	2026-03-09 18:48:31.087Z	168.807° S	36.718°	2026-03-09 18:54:31.087Z	101.364° ESE
14 mins	2026-03-09 21:04:31.087Z	251.881° W	2026-03-09 21:08:31.087Z	191.443° SSW	35.619°	2026-03-09 21:18:31.087Z	122.961° SE
16 mins	2026-03-09 23:24:31.087Z	245.6° WSW	2026-03-09 23:29:31.087Z	207.3° SW	23.633°	2026-03-09 23:40:31.087Z	157.07° SSE

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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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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

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: 19 hours ago

TLE from 19 hours ago

TLE epoch observation values (Epoch: 2026-03-08T15:56:38.459Z)

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: 19 hours ago