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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Civil Technology
Bus & Motor
NRL 6", Unknown motor
Mass
2 kg wet, 2 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Sphere, 0.1 m
Radar Cross Section
0.020 m², Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 VANGUARD 1
1 00005U 58002B 25258.81643954 -.00000054 00000-0 -64438-4 0 9992
2 00005 34.2501 81.1407 1842206 341.4123 12.6954 10.85923711413455Epoch: 2025-09-15T19:35Z
TLE epoch observation values (Epoch: 2025-09-15T19:35:40.376Z)
Latitude
-0.00003°
Longitude
152.20676°
Altitude
706.128 km
Speed
8.142 km/s
True Right ascension
05h 24m 33s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
13:40:50
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,826.033 km
Perigee altitude
651.256 km
Semi-major axis
8,616.781 km
Eccentricity
0.18422
Inclination
34.2501°
RAAN
81.1407°
Arg. of periapsis
341.4123°
True anomaly
18.64746°
Mean anomaly
12.6954°
Eccentric anomaly
15.5196°
Mean motion
2.71347 °/min
Orbital period
132.67 mins
BSTAR
-0.000064438
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Other satellites on launch #2 in the year 1958 (1958-03-17 UTC)
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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.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. |
|---|---|---|---|---|---|---|---|
| 17 mins | 2025-09-17 20:53:09.147Z | 167.971° S | 2025-09-17 20:53:09.147Z | 167.971° S | 38.287° | 2025-09-17 21:10:09.147Z | 129.534° SE |
| 32 mins | 2025-09-17 23:00:09.147Z | 267.48° W | 2025-09-17 23:14:09.147Z | 216.004° SW | 27.912° | 2025-09-17 23:32:09.147Z | 164.885° S |
| 8 mins | 2025-09-18 14:01:09.147Z | 166.426° S | 2025-09-18 14:04:09.147Z | 134.765° SE | 17.535° | 2025-09-18 14:09:09.147Z | 98.949° ESE |
| 19 mins | 2025-09-18 16:17:09.147Z | 232.727° WSW | 2025-09-18 16:23:09.147Z | 163.001° S | 39.447° | 2025-09-18 16:36:09.147Z | 89.118° E |
| 28 mins | 2025-09-18 18:36:09.147Z | 262.211° W | 2025-09-18 18:45:09.147Z | 186.536° SSW | 42.797° | 2025-09-18 19:04:09.147Z | 107.468° ESE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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 ascending order |
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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 ascending order |
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