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PostPosted: Mon Apr 10, 2017 8:13 am 
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Joined: Sun Nov 13, 2011 4:39 pm
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Location: Gilford Park
http://earthsky.org/astronomy-essential ... how-to-see

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For backyard observers, the exciting news is that asteroid 2014 JO25 might be be visible moving across the stars though 8″-diameter and bigger telescopes. Can it be seen with smaller telescopes? Maybe, but in order to be able to detect its motion across the stars, at least an 8″ scope will be required. The asteroid will not be visible to the unaided eye, as it may show a brightness or magnitude between 10 and 11.

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PostPosted: Wed Apr 12, 2017 3:32 pm 
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Joined: Thu Oct 13, 2011 12:53 pm
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Location: Maple Shade, NJ
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Can it be seen with smaller telescopes? Maybe, but in order to be able to detect its motion across the stars, at least an 8″ scope will be required.

I wonder what would happen with less than an 8" scope, the point of light remains motionless, even though the object is actually moving relatively quickly with the respect to the background stars?

For an authoritative discussion about watching the pass of 2014 JO25 on April 19 with a 3" or greater scope, see Bob King's article at Sky & Telescope online.

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