# Sputnik 1 3D model

> Shape built from published dimensions and pictures; details simplified.

Free 3D model of Sputnik 1, a satellite, built from published dimensions by Space Radar. 3,032 triangles, 25 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Launch vehicles
- **Triangles:** 3,032
- **File:** sputnik-1.glb, 25 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 29 m across
- **Made:** Built from dimensions
- **Added:** 2026-11-03
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/sputnik-1.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/sputnik-1.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=sputnik-1
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Sputnik 1 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/sputnik-1/

## How it was made

Built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh. 3D model: built by Space Radar from published dimensions.

built by this project in code (scripts/sputnik/build-sputnik.mjs, release 1.7.0): no agency or museum 3D model of PS-1 under a free licence was found (read 2026-11-03): NASA 3D Resources has nothing of Sputnik; Wikimedia Commons has photographs of the full-size copies and no 3D file. The numbers are published: Wikipedia, Sputnik 1 (read 2026-11-03), from NASA, NSSDC and the Russian sources it cites, gives the sphere as 585 mm in two hemispheres of 2 mm, sealed with O-rings and held by 36 bolts, 83.6 kg, two pairs of whip antennas of 2.4 m and 2.9 m, a cone-shaped payload fairing 80 cm high, the rocket 29.167 m long with PS-1

## Dimensions

- Sphere diameter: 0.585 m
- Whip long: 2.9 m
- Whip short: 2.4 m
- Fairing height: 0.8 m
- Rocket length: 29.167 m

Source: Wikipedia, Sputnik 1 (read 2026-11-03), from NASA and the Russian sources it cites: sphere 585 mm, whips 2.4 m and 2.9 m, fairing 80 cm high, the 8K71PS 29.167 m long with PS-1; the head's 1.95 m is ours

## References

- [Sputnik 1, Wikipedia](https://en.wikipedia.org/wiki/Sputnik_1), Wikipedia contributors, from NASA, NSSDC and the Russian sources it cites (CC BY-SA 4.0 (Wikipedia's text); the numbers are facts)
- [Sputnik 1, NSSDCA Master Catalog](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1957-001B), NASA NSSDCA (Public domain (NASA))