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Vanguard 1

fourth artificial Earth orbital satellite
Vehicle technology_demonstration_spacecraft Q676802
Vanguard 1

Facts

24 properties
Instance of
technology demonstration spacecraft, derelict spacecraft, artificial satellite of the Earth[2][3]
Part of
Vanguard[5]
Duration
+2200[18]
Apoapsis
+3839.9[23]
Argument of periapsis
+120.16
Described by source
Retro Space HD[15]
Diameter
+16.5
Longitude of ascending node
+181.84[21]
Manufacturer
United States Naval Research Laboratory[4]
Mass
+1.46[19]
Mean anomaly
+10.84
Orbital eccentricity
+0.1844061[14]
Orbital inclination
+34.2[17]
Orbital period
+132.8[20]
Parent astronomical body
Earth[7]
Periapsis
+658.9[24]
Powered by
Bell Solar Battery[8]
Semi-major axis of an orbit
+8620[22]
Service retirement
May 1964[11]
Significant event
rocket launch, loss of signal[12][13]
Space launch vehicle
Vanguard[6]
Start point
Cape Canaveral Launch Complex 18[16]
Type of orbit
medium Earth orbit[9]
UTC date of spacecraft launch
March 17, 1958[10]
🏷️ Also known as
en Vanguard 1 en Vanguard I ar فانجارد 1 ar فانغارد 1 ar فانغارد ١ de Vanguard TV4 de 1958-002B de Vanguard 6.5in-Sat 3 he ואנגארד 1 hu Vanguard–1 ja ヴァンガード1号 ko 밴가드 1호 pl Vanguard 1C ru Авангард-1 th แวนการ์ด 1 uk Венгард 1 zh 先鋒1號 zh 先锋1号 zh 前鋒1號 zh 尖兵1号
🔖 Identifiers · 6
COSPAR ID
1958-002B
Freebase ID
/m/0l2d_
Harvard designation
1958 Beta 2
NSSDCA ID
1958-002B
SCN
00005
Wolfram Language entity code
Entity["Satellite", "00005"]
🔗 Connections
Instance of 3
artificial satellite of the Earth, technology demonstration spacecraft, derelict spacecraft
Part of 2
Vanguard, Vanguard
Manufacturer 1
United States Naval Research Laboratory
Parent astronomical body 1
Earth
Significant event 1
rocket launch
Space launch vehicle 1
Vanguard
Start point 1
Cape Canaveral Launch Complex 18
Type of orbit 1
medium Earth orbit
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Summary

Vanguard 1 is a technology demonstration spacecraft[1].

Related Entities

artificial satellite of the Earth Cape Canaveral Launch Complex 18 derelict spacecraft technology demonstration spacecraft United States Naval Research Laboratory Vanguard Vanguard

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . Jonathan's Space Report. wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . bellresources.com. bellresources.com. Provenance: wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . Jonathan's Space Report. wikidata.org.
  10. [11] ↑ . nssdc.gsfc.nasa.gov. nssdc.gsfc.nasa.gov. Provenance: wikidata.org.
  11. [12] ↑ . Jonathan's Space Report. wikidata.org.
  12. [13] ↑ . nssdc.gsfc.nasa.gov. nssdc.gsfc.nasa.gov. Provenance: wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . Jonathan's Space Report. wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . wikidata.org.
  18. [19] ↑ . nssdc.gsfc.nasa.gov. Retrieved . nssdc.gsfc.nasa.gov. Provenance: wikidata.org.
  19. [20] ↑ . wikidata.org.
  20. [21] ↑ . wikidata.org.
  21. [22] ↑ . wikidata.org.
  22. [23] ↑ . wikidata.org.
  23. [24] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Vanguard 1. Retrieved October 30, 2026, from https://4ort.xyz/entity/vanguard-1
MLA “Vanguard 1.” 4ort.xyz Knowledge Graph, 4ort.xyz, 30 Oct. 2026, https://4ort.xyz/entity/vanguard-1.
BibTeX @misc{4ortxyz_vanguard-1_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Vanguard 1}}, year = {2026}, url = {https://4ort.xyz/entity/vanguard-1}, note = {Accessed: 2026-10-30}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Vanguard 1 — https://4ort.xyz/entity/vanguard-1 (retrieved 2026-10-30)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 4w ago · ~2026-52401-96 · 2026-09-29 view diff on Wikidata ↗
    Diameter → {'unit': 'Q174728', 'amount': '+16.5'}
    Semi-major axis of an orbit → {'unit': 'Q828224', 'amount': '+8620'}
    Type of orbit → medium Earth orbit
    Harvard designation → 1958 Beta 2
    + 65 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update:2||1|1 */ Space launch vehicle: Vanguard"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.