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I was taking some photo stacks yesterday, and I also took a plenty of random ones (pointed not at a specific object) too at 200mm.

However, I've ended with a shot but I have no idea where I pointed my camera at, and because of the narrow angle of 200mm, I'm lost without any guiding star/object.

This happened to me before too, so I was wondering whether there is a software or a website that I can upload a photo, and it will analyze the objects, cross match them with known objects and detect which part of the sky it is? Or is there a method that I can use to figure out by myself (remember that there are no well-known bright stars in the image, at least not that I can identify by myself)?

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Have you tried nova.astrometry.net?

They set up a web service for doing more or less what you're talking about.

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  • $\begingroup$ This is EXACTLY what I was looking for. Thank you! $\endgroup$
    – Can Poyrazoğlu
    Commented Jun 18, 2016 at 10:06
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    $\begingroup$ An amazing example of the sort of thing that modern computers/databases/connectivity can achieve. $\endgroup$
    – Fattie
    Commented Jun 18, 2016 at 12:24
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This type of software is called plate-solving software. There are several other software other than astrometry.net that can achieve this as well.

http://pinpoint.dc3.com/

http://www.astrosurf.com/pulgar/elbrus/elbrusin.htm

To name a few

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