Where was my photo pointing?

Add a photograph of the night sky. Opus 5.5 looks for star patterns it can name; the rest is exact: the stars' catalogue positions give where the camera was pointing, how wide the view is and which way is north, and the photo's own points of light have to agree before it is shown as placed. It works best on a wide view of a constellation; a telescope's narrow field usually holds no named star to go on.

Your photo is read once, in your browser and in the one request that looks at it, and is not kept.

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