Whole-Orbital geometry

One unlabelled 3:2 astronomical photograph. A thin open circular space habitat is seen from thirty degrees above its plane, several diameters away. Its outline is a broad elliptical oval. The oval is exactly twice as wide as it is tall in physical pixels, and sits entirely within a generous black border. Make the oval about three-quarters of the picture width and a little over half the picture height. Do not draw a nearly edge-on saucer.

On the 3072 by 2048 photograph, the leftmost point is (369,1024), rightmost (2703,1024), top (1536,440), bottom (1536,1608). These are invisible composition coordinates, not labels. The physical oval bounds are width 2334 and height 1168. Preserve the wide black opening inside this complete oval, with ample black outside all four sides.

The habitat is a finished open bracelet, diameter 3,000,000 kilometres, inward-facing living strip 6,000 kilometres wide, with mostly transparent sloping edgewalls 1,000 kilometres high. That means the material ring is only 1:500 of its diameter: just a few pixels of thin ribbon on this photograph, not a thick torus or cylinder. There is no solid disk inside the oval, no planet, no central sun, no spokes and no visible Hub. Nothing at continent or building scale is resolved.

A real star far outside the picture casts light nearly along the ring plane with a small offset. Only subdued desaturated blue-white light catches portions of the interior-facing strip. Other stretches are dark, with at most tiny discontinuous habitation glints. The rim is not uniformly luminous and has no neon glow or halo. Simplify incidental detail to only a few sparse pin-point background stars; keep the ring geometry, physical scale and restrained lighting. The black opening is empty. Natural astronomical exposure, rectilinear optics, fine subtle grain, no ornamental effects, borders, captions, diagram marks or text.