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
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
Unknown
Radar Cross Section
Small (<0.1 m²)
Expand to show TLE details & historyLast TLE update: 14 hours ago
TLE from 14 hours ago
0 VANGUARD 1
1 5U 58002B 26021.39351953 .00000188 00000-0 22283-3 0 9996
2 5 34.2514 47.3296 1839459 196.6334 156.5046 10.85942182427323Epoch: 2026-01-21T09:26Z
TLE epoch observation values (Epoch: 2026-01-21T09:26:40.087Z)
Latitude
-0°
Longitude
144.90089°
Altitude
3,724.226 km
Speed
5.715 km/s
True Right ascension
03h 09m 19s
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
00:42:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,823.549 km
Perigee altitude
653.542 km
Semi-major axis
8,616.683 km
Eccentricity
0.18395
Inclination
34.2514°
RAAN
47.3296°
Arg. of periapsis
196.6334°
True anomaly
163.42129°
Mean anomaly
156.5046°
Eccentric anomaly
160.09315°
Mean motion
2.71352 °/min
Orbital period
132.67 mins
BSTAR
0.00022283
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Other satellites on launch #2 in the year 1958 (1958-03-17 UTC)
Did you know?
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. |
|---|---|---|---|---|---|---|---|
| 16 mins | 2026-01-22 00:55:32.899Z | 150.973° SSE | 2026-01-22 01:03:32.899Z | 129.849° SE | 13.146° | 2026-01-22 01:11:32.899Z | 108.691° ESE |
| 35 mins | 2026-01-22 03:08:32.899Z | 202.629° SW | 2026-01-22 03:27:32.899Z | 143.579° SSE | 32.508° | 2026-01-22 03:43:32.899Z | 85.962° E |
| 34 mins | 2026-01-22 05:31:32.899Z | 237.624° WSW | 2026-01-22 05:51:32.899Z | 170.234° S | 41.878° | 2026-01-22 06:05:32.899Z | 89.278° E |
| 28 mins | 2026-01-22 07:58:32.899Z | 263.605° W | 2026-01-22 08:16:32.899Z | 177.555° S | 43.075° | 2026-01-22 08:26:32.899Z | 106.373° ESE |
| 18 mins | 2026-01-22 10:26:32.899Z | 272.861° WNW | 2026-01-22 10:37:32.899Z | 213.653° SW | 33.795° | 2026-01-22 10:44:32.899Z | 145.905° SSE |
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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