Vitor Sexto Bernardes wrote: > How do I calculate how dim a satellite can be, still being able to be > caught in my binoculars? For example, a 7x18 binoculars can acquire a > satellite up to what mag? That partly depends upon what your naked eye mag limit is. Here, it's about 4.2. 8x56 binoculars go to mag 8 1/2 or a little fainter. 7x18 probably reach mag 7-8. -- Jay Respler -- JRespler@surfnj.net Sky Views: http://njsurf.com/skyviews/ Satellite Tracker * Early Typewriter Collector Freehold, New Jersey