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Ok. Hello all...
What i must to read for get knowledge: how can i found coordinates of non-stellar objects(comets) on the my photos?
What i need to do?
Thanks.

What you're really asking is how to apply a World Coordinate System (WCS) to the image. This is normally done using the stellar objects in your image, e.g. you measure the (x,y) positions of the objects and correlate them with known positions in (ra,dec) for objects in an astrometric catalog like USNO-B2, and derive a plate solution that gives you the WCS. This sounds easier than it is in practice, especially if you have the star trails from your previous queries, but once you have the WCS you can simply read the coordinate of your comet or other non-stellar object.The GASP package in STSDAS.ANALYSIS is one way to try to do a plate solution and relies on the HST Guide Star Catalog (if you have STSDAS installed try "help gasp option=sysdoc" for details). If you have at least a rough position and an approximate plate scale you can try one of the WCSFIXER tasks from the NVO to see if it can solve the image automatically. One of these is IRAF-based (http://iraf-nvo.noao.edu/wcsfixer/), the other one from UPittsburgh takes a different approach (http://nvogre.phyast.pitt.edu/wcs/), but neither is guaranteed to work. Without seeing the image it's hard to say whether there is anything else you can try.An interesting project to watch is at http://astrometry.net. They've made quite a bit of progress on a general "blind solver" but aren't quite open for public images yet. Hope this helps.Cheers,
-Mike

Ok. Thanks! Will try to do this today's evening on my home Gentoo Linux box.
If test will ok, i'll take a know about my results here.