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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: 1 day ago

TLE from 1 day ago

0 VANGUARD 1
1 00005U 58002B   26134.89553612  .00000102  00000-0  13755-3 0  9992
2 00005  34.2482  57.0677 1836008 348.3595   7.9502 10.85981134439666

Epoch: 2026-05-14T21:29Z

TLE epoch observation values (Epoch: 2026-05-14T21:29:34.320Z)

Latitude

-0.00005°

Longitude

-137.96002°

Altitude

676.08 km

Speed

8.171 km/s

True Right ascension

03h 48m 16s

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

17:03:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,820.332 km

Perigee altitude

656.348 km

Semi-major axis

8,616.477 km

Eccentricity

0.1836

Inclination

34.2482°

RAAN

57.0677°

Arg. of periapsis

348.3595°

True anomaly

11.70013°

Mean anomaly

7.9502°

Eccentric anomaly

9.72763°

Mean motion

2.71362 °/min

Orbital period

132.66 mins

BSTAR

0.00013755

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Computing Atmospheric mass density...

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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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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.
16 mins	2026-05-16 22:15:59.029Z	218.77° SW	2026-05-16 22:21:59.029Z	147.408° SSE	33.587°	2026-05-16 22:31:59.029Z	87.746° E
24 mins	2026-05-17 00:34:59.029Z	254.764° W	2026-05-17 00:42:59.029Z	167.41° S	42.639°	2026-05-17 00:58:59.029Z	99.513° ESE
31 mins	2026-05-17 02:54:59.029Z	268.729° W	2026-05-17 03:05:59.029Z	194.287° SSW	40.216°	2026-05-17 03:25:59.029Z	126.051° SE
31 mins	2026-05-17 05:16:59.029Z	266.767° W	2026-05-17 05:29:59.029Z	213.7° SW	28.941°	2026-05-17 05:47:59.029Z	161.053° S

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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

Please sign-in to view Co-orbital & Co-planar RSOs.

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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Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 2026-05-14T21:29:34.320Z)

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