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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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
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, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 23 hours ago
TLE from 23 hours ago
0 VANGUARD 1
1 00005U 58002B 26259.42768667 .00000404 00000-0 50244-3 0 9996
2 00005 34.2502 32.7157 1837683 189.9666 165.9010 10.86053247453201Epoch: 2026-09-16T10:15Z
TLE epoch observation values (Epoch: 2026-09-16T10:15:52.128Z)
Latitude
-0.00001°
Longitude
-116.63094°
Altitude
3,782.54 km
Speed
5.675 km/s
True Right ascension
02h 10m 51s
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
01:59:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,821.324 km
Perigee altitude
654.593 km
Semi-major axis
8,616.096 km
Eccentricity
0.18377
Inclination
34.2502°
RAAN
32.7157°
Arg. of periapsis
189.9666°
True anomaly
170.08787°
Mean anomaly
165.901°
Eccentric anomaly
168.0764°
Mean motion
2.7138 °/min
Orbital period
132.66 mins
BSTAR
0.00050244
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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. |
|---|---|---|---|---|---|---|---|
| 35 mins | 2026-09-17 10:34:02.703Z | 206.544° SW | 2026-09-17 10:54:02.703Z | 145.957° SSE | 40.695° | 2026-09-17 11:09:02.703Z | 87.342° E |
| 33 mins | 2026-09-17 12:58:02.703Z | 239.717° WSW | 2026-09-17 13:18:02.703Z | 171.62° S | 64.129° | 2026-09-17 13:31:02.703Z | 90.055° ESE |
| 26 mins | 2026-09-17 15:25:02.703Z | 264.888° W | 2026-09-17 15:42:02.703Z | 189.818° SSW | 68.184° | 2026-09-17 15:51:02.703Z | 108.856° ESE |
| 16 mins | 2026-09-17 17:53:02.703Z | 272.291° WNW | 2026-09-17 18:03:02.703Z | 214.625° SW | 38.311° | 2026-09-17 18:09:02.703Z | 151.574° SSE |
| 26 mins | 2026-09-18 08:36:02.703Z | 170.528° S | 2026-09-18 08:49:02.703Z | 134.23° SE | 21.032° | 2026-09-18 09:02:02.703Z | 96.554° 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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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