# PROBA-3 occulter 3D model

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

Free 3D model of PROBA-3 occulter, a satellite, built from published dimensions by Space Radar. 15,324 triangles, 85 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Astronomy
- **Triangles:** 15,324
- **File:** proba-3-osc.glb, 85 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 1.4 m across
- **Made:** Built from dimensions
- **Added:** 2026-10-27
- **NORAD:** 62258
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/proba-3-osc.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/proba-3-osc.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=proba-3-osc
- **On the live map:** https://www.spaceradar.ai/#at=sat-62258
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** PROBA-3 occulter 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/proba-3-osc/

## 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 ESA's published dimensions (no free picture of the craft).

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); no ESA picture or model is in the file: ESA's pictures (CC BY-SA 3.0 IGO), a visitor's photographs of the model (CC BY-SA 4.0) and ISRO's photograph of the stack (GODL-India) were looked at only, for the layout

## Dimensions

- X: 1.378 m
- Y: 1.069 m
- Z: 1.16 m
- Disc: 1.4 m
- Mass: 250 kg

Source: eoPortal, https://www.eoportal.org/satellite-missions/proba-3, OPENED 2026-10-26: 'OSC wet mass is about 250 kg, with a size of 1378mm x 1069 mm x 1160 mm. The Occulter spacecraft structure is essentially a cube with all the avionics and instrument equipment mounted on the inner panels, and with the occulter disc on the anti-Sun face.'; Wikipedia, https://en.wikipedia.org/wiki/PROBA-3, OPENED 2026-10-26: 'It features the occulter disk that is 1.4 meters in diameter.' OURS: which side of the box is which, the metrology fittings' places and sizes, the rim's teeth.

## References

- [PROBA-3 Occulter - model II.jpg](https://commons.wikimedia.org/wiki/File:PROBA-3_Occulter_-_model_II.jpg), Pavel Hrdlicka (Wikimedia Commons) (CC BY-SA 4.0 (Pavel Hrdlicka; read 2026-10-26): share-alike, LOOKED AT ONLY, never fetched by the tool and on no sheet)
- [PSLV-C59, PROBA-3 - Dual spacecraft stack in cleanroom.webp](https://commons.wikimedia.org/wiki/File:PSLV-C59,_PROBA-3_-_Dual_spacecraft_stack_in_cleanroom.webp), Indian Space Research Organisation (GODL-India (ISRO; read 2026-10-26): LOOKED AT ONLY, never fetched by the tool and on no sheet)