# OAO-2 3D model

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

Free 3D model of OAO-2, a space telescope, built from published dimensions by Space Radar. 11,520 triangles, 60 kB glTF, MIT.

- **Class:** Space telescopes
- **Mission:** Astronomy
- **Triangles:** 11,520
- **File:** oao-2.glb, 60 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 4.9 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-27
- **NORAD:** 3597
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/oao-2.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/oao-2.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=oao-2
- **On the live map:** https://www.spaceradar.ai/#at=sat-3597
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** OAO-2 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/oao-2/

## 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 and NASA photographs (public domain).

built by this project in code (the private tool model-from-images: assemble.py, from a yaml of primitives), from the cited dimensions and the pictures under `references`; no image-to-3D model was used, and no published mesh (NASA's 3D Resources, 1 583 paths read 2026-10-26, and NASA Science's resources have none of this craft; the agency pages were searched, and no agency model of it under usable terms was found); NASA's own photographs (public domain, Commons) are the reference

## Dimensions

- Length: 4.9 m
- Solar area: 38.2 m²

Source: NASA NSSDC, https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1968-110A, OPENED 2026-10-26: 'This spacecraft carried two experiment packages, which were located centrally within the spacecraft, each viewing space from opposite ends.' The bus is OAO-3's (NSSDC, 1972-065A: 'an octagonally shaped aluminum structure with a 1.21 m hollow central tubular area'). OURS: every size, read off NASA's photograph; OAO-2's own length is not cited by the page.

## References

- [Orbiting Astronomical Observatory 2.jpg](https://commons.wikimedia.org/wiki/File:Orbiting_Astronomical_Observatory_2.jpg), NASA (Public domain (NASA; read 2026-10-26))
- [Orbiting Astronomical Observatory.jpg](https://commons.wikimedia.org/wiki/File:Orbiting_Astronomical_Observatory.jpg), NASA (Public domain (NASA; read 2026-10-26))