Starlinks "Darksat" not so dark

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Brian
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Starlinks "Darksat" not so dark

Post by Brian »

From
https://www.spaceweather.com/
for 24 Feb 2020

Starlinks experimental "dark" anti-reflective coating doesn't appear to be working.
Brian
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Wellingborough UK.

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brian livesey
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Re: Starlinks "Darksat" not so dark

Post by brian livesey »

And again today: www.spaceweather.com .
brian
stella
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Re: Starlinks "Darksat" not so dark

Post by stella »

Let me tell you my tale.

On January 27, I was scanning the southern part of the sky, when I spotted two
satellites going east. I made magnitude estimates of them, without knowing their
identity. The first one at 18:16:58.10 U.T. was magnitude +4.4. The second at
18:19:56.50 U.T. was magnitude +4.9.
Later that evening I identified them as 20-001P and 20-001U.
The latter one is 'darksat'. So I was unbiased as to its brightness, since I didn't
know that I was observing 'darksat' at the time.
So the action by SpaceX had worked by decreasing its brightness by half-a-magnitude.
So 'painting' the surfaces has worked, but not nearly as much as required.
David Frydman
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Re: Starlinks "Darksat" not so dark

Post by David Frydman »

Are 0.01 seconds real time signals commonly available?

As sound travels about 1,000fps, at ten feet there is a 0.01 second delay.
Actually about 762mph at standard sea level.

Regards,
David
Brian
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Re: Starlinks "Darksat" not so dark

Post by Brian »

Would a good layer of carbon black work I wonder?

Although I did read* that Starlink is participating in secret US "Spacewar" games with NASA and the Military by providing "targets" for top-secret radar and weapons systems testing so presumably they will not be made too difficult to find in that case. I also read that highly advanced surveillance technology is being deployed amongst these communication swarms - what better place to hide then than amongst 40,000 others :mrgreen:

* internet chatter
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed
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