Space Radar Models
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GEOStar-2 satellite bus

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

Turn it in 3D

GEOStar-2 satellite bus, 3D model, three-quarter view

Open the 3D viewer (www.spaceradar.ai).

The viewer loads when you ask: about 700 kB the first time (three.js and the model), much less after.

Pictures 4

  • GEOStar-2 satellite bus, three-quarter viewThree-quarter view
  • GEOStar-2 satellite bus, from the sideFrom the side
  • GEOStar-2 satellite bus, from behindFrom behind
  • GEOStar-2 satellite bus, from aboveFrom above

About this model

GEOStar-2 satellite bus is one of the 203 3D models Space Radar made itself: a satellite, built in code from published dimensions and photographs, with no image-to-3D generator and no one else’s mesh.

Shape built from published dimensions and the maker’s renders; details estimated. It has 13,356 triangles in a 100 kB glTF file, and is 22 m across at full scale.

It is part of the map’s library; no object on the live map is drawn with it today.

Dimensions and their sources

MeasureValue
Body x1.8 m
Body y2.3 m
Body z3.2 m
Span22.4 m
Reflector2.4 m

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. (read 2026-11-07)

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.

The full record

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)

Where the map uses it. the 27 geostationary satellites registry/geo-buses.yaml names as Northrop Grumman (Orbital) GEOStar-2 (Star-2, 2.4, 2e), by catalogue number. A family FORM, not one satellite's payload: the route is `generic` and the card says the shape is built from the maker's renders. They wore the SSL-1300 stand-in; forge #117

Licence note. The numbers are facts (GCAT CC BY 4.0, Wikipedia CC BY-SA 4.0); the shape is this project's, under this repository's licence. The photographs and renders named under `references` were LOOKED AT ONLY: no part of any is in a file. NO LOGO AND NO LETTERING is on the mesh.

References 7

What the shape was compared with. None of these pictures is in the file.

  1. Amazonas 4A (Gunter's Space Page)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)
  2. Azerspace-1 (Gunter's Space Page)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)
  3. Eutelsat 5 West B (Gunter's Space Page)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)
  4. Galaxy 30 (Gunter's Space Page)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)
  5. Horizons-2 (Gunter's Space Page)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)
  6. Hylas 2 (Gunter's Space Page)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)
  7. General Catalog of Artificial Space Objects (GCAT), satcat.tsv of 2026-11-07Jonathan C. McDowellCC BY 4.0 (the catalogue's own statement)

Use it

The model is under the MIT licence: use it, change it and share it, in any project, also a paid one. Keep the credit:

GEOStar-2 satellite bus 3D model by Space Radar (spaceradar.ai), MIT License

Any glTF 2.0 loader that reads meshopt compression (EXT_meshopt_compression) opens the file: three.js with its MeshoptDecoder, Babylon.js, model-viewer. Tools such as glTF-Transform can write an uncompressed copy.

Or embed the viewer in your page:

<iframe src="https://www.spaceradar.ai/model/?id=bus-geostar-2" title="GEOStar-2 satellite bus, 3D model by Space Radar" width="600" height="450" loading="lazy" style="border:0;max-width:100%"></iframe>

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