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Location: UFOUpDatesList.Com > 2012 > May > May 20

Re: Unusual Craft Over Reading, England

From: William Treurniet <wtreurniet.nul>
Date: Sat, 19 May 2012 14:54:52 -0400
Archived: Sun, 20 May 2012 17:48:56 -0400
Subject: Re: Unusual Craft Over Reading, England


>From: Martin Shough<parcellular.nul>
>To:<post.nul>
>Date: Sat, 19 May 2012 16:20:43 +0100
>Subject: Re: Unusual Craft Over Reading, England

>>From: William Treurniet<wtreurniet.nul>
>>To: post.nul
>>Date: Fri, 18 May 2012 20:03:54 -0400
>>Subject: Unusual Craft Over Reading, England

><snip>

>>This object seems to be at a relatively low altitude, and is
>>somewhat spherical in shape. There appears to be a black band
>>separating two whitish hemispheres. Occasionally, the white
>>changes to a cyan color.

><snip>

>>I posted the clip at the following location:

>>http://tinyurl.com/d6lboud

>>Can anyone identify this object?

>One possibility is a drifting soap bubble.

>A transparent bubble typically shows an "upright" reflection of
>the environment in one hemisphere and an "inverted" reflection
>of the same scene in the other. The reflection is an extremely
>wide angle or fish-eye type image, like an all-sky camera.
>Against a bright sky you will often see two such reflections of
>the sky separated by a darker band which is the horizon (check
>Google images for "soap bubble reflection").

>If you can find the pointing angle of the camera relative to the
>local horizon you might be able to prove this to your
>satisfaction by ray tracing, or you could ask your friend to try
>photographing a detergent bubble in the same location and
>conditions.

>Further, with some camera data such as angular FOV and lens
>hyperfocal distance, and local weather records, you could put
>some limits on distance, angular size, angular rate, true rate
>and direction that would help to test the hypothesis.

Thank you Martin, for mentioning that possible explanation.
Maybe not a soap bubble, but a mylar balloon? A problem with it
though is that the black band in the object has a vertical
orientation. Presumably the horizon is horizontal in England.

Also, towards the end of the clip, the object turns so that the
band disappears. The band appears to go behind the object,
suggesting it is a semicircle rather than a full circle. A
spherical reflection would not disappear.

The object also seems to flash briefly occasionally, which would
be odd if the light source were the sun. Judging from the way
the cloud is illuminated, the sun is approximately behind the
camera location. The flashes suggest to me that the light source
is the object itself.

If anyone is interested in taking a closer look, I recommend
downloading the hires (720p) mp4 version, then stepping through
it a frame at a time. I use the arrow keys with the Apple
QuickTime player.


William



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