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Unless I've misunderstood, it looks like this may be a problem
Taking an approximation of half a degree for the sun
Wouldn't that be affected by having less than the full Sun in the FOV?
I got 0.476 degrees/second.
I was using the value provided by the astronomer, 1º/sec.
reply to post by Curious69
This deserves a explanation, a bouble leaving the sun? anybody have exampels of this from earlier?
phys.org...edit on 12/4/2013 by Phage because: (no reason given)
I agree on what that is. But contrary to the text that yourignoranceisbliss originally posted with that graphic, it doesn't appear to be "a close-up view of OP's picture" at all. It's dated about 21 months previous to the OP's actual GIF, and appears to be a timelapse taken over several days, not 36 milliseconds.
Phage, I would be very interested to hear what you think was in the OP's original graphic. The one about which Richard Schmidt of Burleith Observatory said: "While imaging sunspots we observed a fast-moving satellite with a long boom arm crossing the field of view. This sequence spans 36 milliseconds of real time. The object was moving East at 1 degree per second. Lunt LS100 solar telescope."
Taken by Richard Schmidt on December 1, 2013 @ Burleith Observatory, Washington, DC.
While imaging sunspots we observed a fast-moving satellite with a long boom arm crossing the field of view. This sequence spans 36 milliseconds of real time. The object was moving East at 1 degree per second. Lunt LS100 solar telescope.
Link to source on spaceweather.com
It looks like a weather balloon with a tethered instrument pack or a satellite with a boom, but at 1 degree per second I think it would be moving too fast for either of those.
reply to post by ikonoklast
Since most satellites move east (more or less) the direction isn't a problem.
Let's start by guessing that the object is a satellite and it's in an orbit 250 miles above the Earth. That gives it a speed of 17,157 mph (4.76 mi/sec). At that altitude 4.76 miles has an angular length of 1.09º when directly overhead. For an angular velocity of 1.09º/sec.
Now, we don't know the elevation of the Sun at the time (or do we?) and that "1º/sec" is a suspiciously round number but the lower the orbit, the faster and there are satellites which orbit lower than that so, a satellite is entirely plausible and is the likely culprit and prime suspect.
reply to post by ChuckNasty
No. It's the observed angular velocity...how fast it was moving across the sky. Astronomers do not make observations from the center of the planet.