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: 11 hours ago
TLE from 11 hours ago
0 VANGUARD 1
1 00005U 58002B 25296.44128684 .00000007 00000-0 11179-4 0 9991
2 00005 34.2482 324.9912 1841574 151.0667 220.5891 10.85925080417542Epoch: 2025-10-23T10:35Z
TLE epoch observation values (Epoch: 2025-10-23T10:35:27.182Z)
Latitude
-0.00004°
Longitude
134.02739°
Altitude
3,540.484 km
Speed
5.842 km/s
True Right ascension
21h 39m 57s
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
16:44:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,825.48 km
Perigee altitude
651.794 km
Semi-major axis
8,616.774 km
Eccentricity
0.18416
Inclination
34.2482°
RAAN
324.9912°
Arg. of periapsis
151.0667°
True anomaly
208.98858°
Mean anomaly
220.5891°
Eccentric anomaly
214.59785°
Mean motion
2.71348 °/min
Orbital period
132.67 mins
BSTAR
0.000011179
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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. |
|---|---|---|---|---|---|---|---|
| 19 mins | 2025-10-24 02:01:33.572Z | 174.06° S | 2025-10-24 02:12:33.572Z | 141.743° SSE | 16.143° | 2025-10-24 02:20:33.572Z | 111.582° ESE |
| 25 mins | 2025-10-24 04:20:33.572Z | 213.976° SW | 2025-10-24 04:35:33.572Z | 157.249° SSE | 32.108° | 2025-10-24 04:45:33.572Z | 93.178° ESE |
| 19 mins | 2025-10-24 06:45:33.572Z | 245.055° WSW | 2025-10-24 06:57:33.572Z | 181.923° SSW | 40.362° | 2025-10-24 07:04:33.572Z | 98.352° ESE |
| 13 mins | 2025-10-24 09:10:33.572Z | 264.87° W | 2025-10-24 09:18:33.572Z | 199.858° SSW | 38.049° | 2025-10-24 09:23:33.572Z | 121.414° SE |
| 5 mins | 2025-10-24 11:35:33.572Z | 242.866° WSW | 2025-10-24 11:37:33.572Z | 219.479° SW | 15.916° | 2025-10-24 11:40:33.572Z | 179.176° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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