Re: Are Starlink Ion Propulsion Trails Visible?

From: George Roberts via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 30 Jul 2021 22:44:24 -0400
Those "trails" are caused by the camera shutter staying open.  It's an 
effect of photography.  The satellites themselves look like a moving dot.

The question should possibly be rephrased: "why are some of these 
satellites more bluish and some more reddish?  Is it because we can see 
the ion drive?"

I don't know the answer but possibly it has something to do with the 
sunlight passing through a lot of the earth's atmosphere and the blue 
light being scattered more in certain situations?

- George

On 7/30/21 4:50 PM, Anthony Mallama via Seesat-l wrote:
> I have observed hundreds of Starlink satellites in binoculars but have not
> seen trails. I haven't heard of anyone mentioning them either. That doesn't
> mean that they are never visible though. Maybe someone familiar with ion
> propulsion can comment.
>
> Tony Mallama
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Received on Fri Jul 30 2021 - 21:45:37 UTC

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