Had this blob in the sky hanging around for 20-30mins in approx same location before moving off. Got the DSLR out with 135mm and took some photos to get a better look. Seems to change shape a bit or reflect light differently. Moved at different speed than the clouds, but could have been much higher altitude. In some photos looks like a weather balloon, although usually they climb in altitude quicker.
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So theres a sad kid somewhere whos lost their balloon right?

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So theres a sad kid somewhere whos lost their balloon right?