# GEOStar-2 satellite bus 3D model

> Shape built from published dimensions and the maker’s renders; details estimated.

Free 3D model of GEOStar-2 satellite bus, a satellite, built from published dimensions by Space Radar. 13,356 triangles, 100 kB glTF, MIT.

- **Class:** Satellites
- **Mission:** Communications
- **Triangles:** 13,356
- **File:** bus-geostar-2.glb, 100 kB, glTF 2.0 binary (meshopt)
- **Look:** Physically based
- **Size:** 22 m across
- **Made:** Built from dimensions
- **Added:** 2026-11-08
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/bus-geostar-2.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/bus-geostar-2.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=bus-geostar-2
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** GEOStar-2 satellite bus 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/bus-geostar-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 (McDowell's GCAT, Wikipedia); layout read from the makers' photographs and renders, looked at only.

built by this project in code (tools/bus-builder, release 2.0.0 batch m4-buses) from published sizes, with the photographs and the maker's renders under `references` LOOKED AT ONLY; no image-to-3D model was used and no published mesh (NASA 3D Resources has none of this bus)

## Dimensions

- Body x: 1.8 m
- Body y: 2.3 m
- Body z: 3.2 m
- Span: 22.4 m
- Reflector: 2.4 m

Source: GCAT, the 27 satellites: Length 3.2 to 5.6 m (median 4.7, with the stowed antennas), Diameter 2.0 to 3.4 m (median 2.3), Span 17.0 to 25.6 m (median 22.4), launch mass 2 000 to 3 300 kg. Drawn: a box 1.8 x 2.3 x 3.2 m (4.4 m with the deck antennas), 22.4 m over the wings. OURS (ESTIMATED): the reflectors' 2.4 m and their arms and tilts, three panels of 2.15 x 2.6 m and a 0.7 m pale end panel a wing (drawn as the renders show it; its purpose is not published), the yoke, the deck reflector.

## References

- [Amazonas 4A (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/amazonas-4a.htm), Orbital ATK, via Gunter's Space Page (Gunter D. Krebs) (copyright Orbital ATK (a maker's render; looked at only, no part of it is in a file))
- [Azerspace-1 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/azerspace-1.htm), Orbital Sciences, via Gunter's Space Page (Gunter D. Krebs) (copyright Orbital Sciences (a maker's render; looked at only, no part of it is in a file))
- [Eutelsat 5 West B (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/eutelsat-5-west-b.htm), Northrop Grumman, via Gunter's Space Page (Gunter D. Krebs) (copyright Northrop Grumman (a maker's render; looked at only, no part of it is in a file))
- [Galaxy 30 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/galaxy-30.htm), Northrop Grumman, via Gunter's Space Page (Gunter D. Krebs) (copyright Northrop Grumman (a maker's render; looked at only, no part of it is in a file))
- [Horizons-2 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/horizons-2.htm), Orbital Sciences, via Gunter's Space Page (Gunter D. Krebs) (copyright Orbital Sciences (a maker's render; looked at only, no part of it is in a file))
- [Hylas 2 (Gunter's Space Page)](https://space.skyrocket.de/doc_sdat/hylas-2.htm), Orbital Sciences, via Gunter's Space Page (Gunter D. Krebs) (copyright Orbital Sciences (a maker's render; looked at only, no part of it is in a file))
- [General Catalog of Artificial Space Objects (GCAT), satcat.tsv of 2026-11-07](https://planet4589.org/space/gcat/tsv/cat/satcat.tsv), Jonathan C. McDowell (CC BY 4.0 (the catalogue's own statement))