# Hitomi 3D model

> Shape built from an artist’s render; proportions approximate.

Free 3D model of Hitomi, a space telescope, generated from a public-domain picture and repaired by Space Radar. 13,284 triangles, 138 kB glTF, MIT.

- **Class:** Space telescopes
- **Mission:** Astronomy
- **Triangles:** 13,284
- **File:** hitomi.glb, 138 kB, glTF 2.0 binary (meshopt)
- **Look:** Flat colours
- **Size:** 14 m across
- **Made:** Generated, then repaired
- **Added:** 2026-10-13
- **NORAD:** 41337
- **Download:** https://raw.githubusercontent.com/Sara-Managed-Projects/space-radar/main/site/models/hitomi.glb
- **Mirror:** https://git.sara-agent.org/sara-projects/space-radar/raw/branch/main/site/models/hitomi.glb
- **Viewer:** https://www.spaceradar.ai/model/?id=hitomi
- **On the live map:** https://www.spaceradar.ai/#at=sat-41337
- **Licence:** MIT (https://github.com/Sara-Managed-Projects/space-radar/blob/main/LICENSE)
- **Credit:** Hitomi 3D model by Space Radar (spaceradar.ai), MIT License

Canonical: https://models.spaceradar.ai/hitomi/

## How it was made

Generated from a public-domain picture with TRELLIS (Microsoft Research, MIT licence), then repaired, measured and completed in code. 3D model: body generated from NASA Goddard renders of XRISM with TRELLIS (Microsoft Research, MIT); Hitomi's optical bench and detectors built by Space Radar from published dimensions and NASA drawings.

https://github.com/microsoft/TRELLIS — THE BODY IS XRISM'S: the mesh TRELLIS generated on 2026-10-13 from two frames of NASA Goddard's turntable render of XRISM (row `xrism`), which is Hitomi's recovery mission on the same bus; nothing was generated for this row. Hitomi's own parts, the extensible optical bench, the HXI plate and its two imagers, the two soft gamma-ray detectors, and both solar paddles were built in code

## Dimensions

- Total length: 14 m
- Bench: 6.4 m
- Body height: 7.9 m
- Span: 9.2 m

Source: Takahashi et al., 'The ASTRO-H X-ray Astronomy Satellite', https://ar5iv.labs.arxiv.org/html/1412.1356, opened 2026-10-13: 'Total Length 14 m'; 'The focal length of the HXTs is 12 m. The Hard X-ray Imaging detectors (HXIs) are mounted on the HXI plate, at the end of a 6 m extendable optical bench (EOB) that is stowed to fit in the launch fairing and deployed once in orbit.' JAXA's press kit, https://global.jaxa.jp/projects/sat/astro_h/files/astroh_presskit.pdf, opened 2026-10-13, figure 3.1: 'Overall length ~14 m', 'Extensible Optical Bench (EOB) ~6.4 m'. THE TWO DISAGREE on the bench by 0.4 m; the 6.4 m is built, which with the body's 7.9 m is 14.3 m. The body's 7.9 m and the 9.2 m span are XRISM's (row `xrism`): no source opened gives Hitomi's body or its paddles alone. The breakup, JAXA, https://global.jaxa.jp/press/2016/04/20160428_hitomi.html, opened 2026-10-13: 'it is highly likely that both solar array paddles had broken off at their bases where they are vulnerable to rotation.' NOT CITED: the bench's 0.7 m side, the HXI plate's 1.9 m, the detectors' boxes and which side panels they sit on

## References

- [XRISM 001](https://commons.wikimedia.org/wiki/File:XRISM_001.png), NASA's Goddard Space Flight Center Conceptual Image Lab (Public domain (NASA's Goddard Space Flight Center Conceptual Image Lab))
- [XRISM 004](https://commons.wikimedia.org/wiki/File:XRISM_004.png), NASA's Goddard Space Flight Center Conceptual Image Lab (Public domain (NASA's Goddard Space Flight Center Conceptual Image Lab))
- [Hitomi](https://commons.wikimedia.org/wiki/File:Hitomi.png), NASA (Public domain (NASA))
- [Astro-H schema (en)](https://commons.wikimedia.org/wiki/File:Astro-H_schema_(en).png), NASA/HEASARC (Public domain (NASA/HEASARC))