Quote:
Originally Posted by Uchtungbaby
Loomberah,
>> One moment it was there silhuoetted against the moon, the next it had passed.
Had I taken the time to time the transit of the object I might now know its' speed. Knowing its' speed would assist location once direction has been established.  |
So, did you actually see it moving? Did you take any other photos of the Moon around the same time, any other photos of anything bright with your lens set to a high f/#? They will no doubt show the dust spot too, and the 2 in the upper part of the Moon if none of them moved.
Looking at the image, the dark spot in the middle is about 20" across, so:
*IF* it was a 1m diameter weather balloon, it would have been about 10km range.
*IF* it was a satellite at say 500km range it would have to be about 50m across, ie it is not a satellite as its not ISS.
*IF* it was an asteroid half way to the Moon it would be about 20km diameter, and there are no asteroids that big anywhere near Earth now. There are unlikely to be any undiscovered Near-Earth asteroids that size anyway.
A small dust spot would look exactly like what you have in your image.
Gordon