How accurate are the annotations?
Not very. The annotations are based on an approximate mathematical model. Since the model is not exact, some stars are annotated several pixels away from their actual location. So far, 25 pixels is about the maximum error I’ve spotted, but it could be larger in some cases. The exact error depends on how the original mathematical model was created (it’s created a little differently for each photograph). I’ve tried to be careful to avoid very large errors, but some error is inherent. 2.2. Are planets annotated? No. Although it’s possible to compute the position of a planet at a given time, it would require knowing when the photograph was taken. While I do have this information for some photographs, I don’t have it for all of them. It’s also somewhat computationally intensive to compute planetary positions, so I’ve decided to leave them out for now (if a planet appears in a photograph, it’s often mentioned in the description anyway). 2.3. Are Messier and other deep-sky objects annotated?
