Re: A possible satellite observation?
Sat, 7 Aug 1999 20:05:06 EDT

In a message dated 8/3/99 10:32:50 PM Eastern Daylight Time, writes:

> I've never observed a grazing occultation, but I sort of wonder if the star
>  was never actually occulted, how much it would move relative to the Moon 
> 5
>  minutes.  Mightn't the motion be imperceptible at least to some observers? 

I've seen a few.  There is very little motion in 5 minutes.  Unless you are 
using 600+ power (and have good resolution, something few amatuers have - 
with 600x, if they can achieve it), you will not detect motion for, at the 
very least, 5 minutes.  Consider this: the moon moves at 30 arc-minutes per 
hour, or 30" per minute (2 and a half arc-minutes in five minutes).  A 
scrutinizing observer theoretically could detect movement inside of 300 
seconds, but if the star was already an arc-minute or so off the moon's limb, 
movement would be much less visible.

I believe that it is very possible that this was a star.