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: 1 day ago
TLE from 1 day ago
0 VANGUARD 1
1 00005U 58002B 26291.06405159 .00000466 00000-0 59004-3 0 9997
2 00005 34.2518 295.0839 1838991 332.5693 18.8501 10.86077279456641Epoch: 2026-10-18T01:32Z
TLE epoch observation values (Epoch: 2026-10-18T01:32:14.057Z)
Latitude
0°
Longitude
-114.5364°
Altitude
775.876 km
Speed
8.074 km/s
True Right ascension
19h 40m 20s
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
20:01:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,822.301 km
Perigee altitude
653.363 km
Semi-major axis
8,615.969 km
Eccentricity
0.1839
Inclination
34.2518°
RAAN
295.0839°
Arg. of periapsis
332.5693°
True anomaly
27.49073°
Mean anomaly
18.8501°
Eccentric anomaly
22.96039°
Mean motion
2.71386 °/min
Orbital period
132.65 mins
BSTAR
0.00059004
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-10-19 01:58:08.207Z | 161.94° S | 2026-10-19 02:02:08.207Z | 129.087° SE | 15.052° | 2026-10-19 02:07:08.207Z | 99.509° ESE |
| 21 mins | 2026-10-19 04:14:08.207Z | 223.213° SW | 2026-10-19 04:21:08.207Z | 152.749° SSE | 51.369° | 2026-10-19 04:35:08.207Z | 85.845° E |
| 30 mins | 2026-10-19 06:33:08.207Z | 258.206° W | 2026-10-19 06:43:08.207Z | 184.303° SSW | 71.19° | 2026-10-19 07:03:08.207Z | 100.962° ESE |
| 36 mins | 2026-10-19 08:54:08.207Z | 271.684° WNW | 2026-10-19 09:08:08.207Z | 198.47° SSW | 59.42° | 2026-10-19 09:30:08.207Z | 128.568° SE |
| 34 mins | 2026-10-19 11:17:08.207Z | 271.03° WNW | 2026-10-19 11:33:08.207Z | 216.66° SW | 33.464° | 2026-10-19 11:51:08.207Z | 164.826° S |
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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